ROKAE NB25 Series User manual

NB25 Series
Product Manual

NB25 Series
Product Manual
Document No.:DOC-00001492
Version: A
© Copyright 2015 ROKAE. All rights reserved.

This manual may not be copied or disclosed without the express permission of ROKAE.
We have checked the contents of this manual. Nevertheless, discrepancies or errors cannot be
precluded. We are not able to guarantee total conformity.
We will check the contents of this manual on a regular basis. No prior notice will be given if there is
any change in the contents of the manual.
It is impossible for ROKAE to foresee all hazards and consequences, and therefore this manual
cannot warn the user of all possible hazards.
If you find any errors or anything need to be improved or complemented in this manual, please
contact us.
The original language of this manual is Chinese. Any other language versions are translated from
Chinese.
© Copyright 2015 ROKAE. All rights reserved.

Contents
NB25 Series Product Manual
Contents
1 Manual Overview ............................................................................................................... 1
1.1 About this manual................................................................................................................................ 1
1.2 Target group ......................................................................................................................................... 1
1.3 How to read the product manual ........................................................................................................ 1
1.4 Illustrations in this manual ................................................................................................................. 1
1.5 Contact ................................................................................................................................................. 1
2 Safety................................................................................................................................. 3
2.1 Introduction .......................................................................................................................................... 3
2.1.1 Safety responsibility description .......................................................................................... 3
2.1.2 Using the robot in compliance .............................................................................................. 3
2.2 Safety terms ......................................................................................................................................... 3
2.2.1 Safety symbols....................................................................................................................... 3
2.2.2 Hazard description................................................................................................................. 4
2.2.3 Safety features ....................................................................................................................... 5
2.2.4 Motion enabling and safe stop ............................................................................................. 6
2.2.5 Safety devices ........................................................................................................................ 7
2.3 Safety precautions............................................................................................................................... 8
2.3.1 Overview ................................................................................................................................. 8
2.3.2 About the user's own safety.................................................................................................. 9
2.3.3 Safety precautions for operating the Teach Pendant.......................................................... 9
2.3.4 Safety precautions for using the control cabinet .............................................................. 10
2.3.5 Emergency stop button test ................................................................................................ 11
2.3.6 Resetting the emergency stop ............................................................................................ 11
2.3.7 Band-type brake test ........................................................................................................... 11
2.3.8 Manual release of the band-type brake ............................................................................. 12
2.3.9 Safety precautions in manual mode................................................................................... 12
2.3.10 Safety precautions in auto mode...................................................................................... 13
2.3.11 Safe handling on the production line................................................................................ 13
2.3.12 Safe handling of fire accidents ......................................................................................... 13
2.3.13 Safe handling of electric shock accidents ....................................................................... 14
2.4 Personnel and work content requirements...................................................................................... 14
2.4.1 Definition of personnel ........................................................................................................ 14
2.4.2 Personnel requirements ...................................................................................................... 15
2.4.3 Work content requirements ................................................................................................. 16
2.5 Safety training .................................................................................................................................... 16
2.5.1 Overview ............................................................................................................................... 16
2.5.2 Personnel safety .................................................................................................................. 17
3 Product Overview ............................................................................................................ 19
3.1 Introduction ........................................................................................................................................ 19
3.2 Robot................................................................................................................................................... 19
3.2.1 Overview ............................................................................................................................... 19
3.2.2 Robot system ....................................................................................................................... 19
3.2.3 Robot arm body.................................................................................................................... 20
3.3 Symbols and labels............................................................................................................................ 21
4 Technical Specifications ................................................................................................. 23
4.1 Introduction ........................................................................................................................................ 23
4.2 Model .................................................................................................................................................. 23
4.3 Specification....................................................................................................................................... 23
4.4 Allowable wrist payload..................................................................................................................... 24
4.4.1 Allowable torque and inertia ............................................................................................... 24
4.4.2 Center of gravity of the load ................................................................................................ 25
4.4.3 Load diagram ....................................................................................................................... 25
4.4.4 Calculating the Inertia Moment........................................................................................... 28
4.5 Working space.................................................................................................................................... 29

Contents
II NB25 Series Product Manual
4.6 Overall dimensions and mechanical interfaces...............................................................................32
4.7 Mounting flange .................................................................................................................................36
5 Environment and Installation ..........................................................................................39
5.1 Introduction ........................................................................................................................................39
5.2 Installation process table ..................................................................................................................39
5.3 Environmental conditions..................................................................................................................39
5.4 Unpacking ...........................................................................................................................................40
5.4.1 Unpacking .............................................................................................................................40
5.4.2 Robot transportation angle..................................................................................................43
5.4.3 Inspection before the transportation ..................................................................................43
5.5 On-site installation.............................................................................................................................44
5.5.1 Handling ................................................................................................................................44
5.5.2 Installing the robot ...............................................................................................................46
5.5.3 Fixing the required parts ......................................................................................................47
5.5.4 Bracket installation ..............................................................................................................47
5.5.5 Foundation installation ........................................................................................................48
5.5.6 Supporting reaction force of the robot ...............................................................................48
5.6 Electrical connection..........................................................................................................................49
5.6.1 Definition of the robot arm body side ports .......................................................................50
5.6.2 Definition of the IO fitting pins ............................................................................................51
5.6.3 Cabinet cable length and wiring method ............................................................................52
5.7 User wiring/routing ............................................................................................................................52
5.8 Brake release ......................................................................................................................................53
6 Zero calibration................................................................................................................55
6.1.1 Overview................................................................................................................................55
6.1.2 What is a mechanical zero? .................................................................................................55
6.1.3 What is zero calibration?......................................................................................................55
6.1.4 When is zero calibration required? ......................................................................................56
6.2 Calibration method.............................................................................................................................56
6.2.1 Calibration position ..............................................................................................................56
6.2.2 Mechanical calibration.........................................................................................................57
6.3 Zero check...........................................................................................................................................58
7 Maintenance ....................................................................................................................61
7.1 Introduction ........................................................................................................................................61
7.2 Safety maintenance ...........................................................................................................................61
7.3 Maintenance outline...........................................................................................................................61
7.3.1 Inspection progress and contents ......................................................................................61
7.3.2 Lubrication ............................................................................................................................63
7.3.3 Motor sealing........................................................................................................................68
7.3.4 Fastening of socket head cap screws ................................................................................69
7.3.5 Battery replacement .............................................................................................................70
7.3.6 Maintenance of timing belts................................................................................................71
7.4 Cleaning ..............................................................................................................................................73
7.5 Confirmation after maintenance .......................................................................................................73
7.6 Maintenance Part List........................................................................................................................74
8 Common Failures.............................................................................................................75
8.1 Introduction ........................................................................................................................................75
8.2 Analysis of the failure causes and countermeasures .....................................................................75
Revision...............................................................................................................................79

1 Manual Overview
NB25 Series Product Manual 1
1Manual Overview
1.1 About this manual
Thank you for purchasing our robot system.
This manual contains the following instructions for correct installation and use of the robot:
Mechanical and electrical installation of the robot
Maintenance and calibration of the robot
Please read this manual and other related manuals carefully before installing and using the
robot system.
After reading, keep the manual properly so that you can read it at any time.
1.2 Target group
This manual is for:
Installation personnel
Maintenance personnel
Please ensure that the above personnel have the necessary knowledge of mechanical and
electrical installation and maintenance, and have received our relevant training.
1.3 How to read the product manual
This manual includes a separate safety chapter that must be read through before proceeding
with installation or maintenance operations.
1.4 Illustrations in this manual
Due to product upgrades or other reasons, some figures in the product manual may differ
from the actual product. However, the operating procedures are correct.
Also, figures of other types of robots may be used to describe some general information.
1.5 Contact
For matters related to maintenance and repair of the robot, please contact our after-sales
department or the local reseller.
Service hotline: [phone].
Get the following information ready when contacting us:
Controller model/serial number
Robot model/serial number
Software name/version
Problems with the system

2 Safety
NB25 Series Product Manual 3
2Safety
2.1 Introduction
This section describes the safety principles and processes that need to be noted when using
the robot.
The contents related to the design and installation of the external safety protection device of
the robot are not covered within this section. Please contact your system integrator to obtain
such information.
2.1.1 Safety responsibility description
ROKAE is dedicated to but not liable for providing reliable safety information. Even if all
operations are carried out according to the safe operation instructions, we cannot guarantee
that our industrial robots will not cause personal and property losses.
In addition to the safety section, please also note that there are other safety reminders in the
necessary parts of the document.
2.1.2 Using the robot in compliance
The industrial robots should be used in accordance with local laws and regulations, and must
not be used for any purpose that violates such laws and regulations.
Using the robot in compliance also means observing the instructions in product manuals of
various individual components, including the operation, installation and maintenance
instructions for them.
The following uses that violate the rules shall be prohibited:
Transporting people and animals
Using in environments with explosion hazard
Using in flammable environments
Using outside the permissible range
Using downhole
2.2 Safety terms
2.2.1 Safety symbols
2.2.1.1 About safety symbols
There may be different degrees of danger when operating the robot in accordance with this
manual, so there will be a special safety symbol in the vicinity of dangerous operation
instructions to remind the user to be careful. The contents include:
An icon that indicates safety level and the corresponding name, such as warning, danger,
tips, etc.;
A brief description given to illustrate the possible consequences if the operator does not
eliminate the danger;
Operating instructions on how to eliminate dangers.
2.2.1.2 Safety levels

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4 NB25 Series Product Manual
Icon
Name
Description
Danger
For those coming with this sign, failure of following the rules
in operation may cause serious or even fatal injury to
personnel, and will/may cause serious damage to the robot.
Operations related to such hazards include contacting high-
voltage devices in the control cabinet, entering the working
area when the robot is running, etc.
Warning
For those coming with this sign, failure of following the rules
in operation may cause serious and even fatal personal
injury, and will cause a great damage to the robot.
Alert
For those coming with this sign, failure of following the rules
in operation may cause personal injury, and may cause
damage to the robot.
Tips
This icon indicates important information or prerequisites.
2.2.2 Hazard description
2.2.2.1 Hazards
Icon
Name
Description
Squeezing
There may be an injury to the operators and maintenance
personnel who enter into the motion range of the robot
during debugging, repair, overhaul and tool installation.
Hand
pinching
There may be a risk of hand pinching when the maintenance
personnel approach the belt drive parts or other moving
parts during maintenance.
Strike
There may be a serious injury to the operators and
maintenance personnel who enter into the motion range of
the robot during debugging, repair, overhaul and tool
installation.
Friction
There may be an injury to the operators and maintenance
personnel who enter into the motion range of the robot
during debugging, repair, overhaul and tool installation.
Parts
flying out
There may be a serious injury to the operators and
maintenance personnel who enter into the motion range of
the robot during debugging, repair, overhaul and tool
installation when tools or workpieces fly out due to loose
clamping.
Fire
There may be a serious injury due to fire that might occur in
case of electrical short circuit or the wire or device on fire.
Hot
surface
During the maintenance and repair of the equipment, a burn
may be caused if the maintenance personnel touch the
robot's hot surface.
Electric
shock
The current operation may cause an electric shock with a
serious or even fatal injury.

2 Safety
NB25 Series Product Manual 5
Icon
Name
Description
ESD
The components involved in the current operation are
sensitive to static electricity. Failure to operate according to
specifications may cause component damage.
Warning
Any robot in motion is a potentially fatal machine!
When the robot is running, it may execute undesirable or even unreasonable motions. In
addition, the robot carries huge energy when it is running. It will cause serious
damage/injury to the personnel and equipment in its working area in case of collision.
2.2.2.2 Danger elimination
Operation
Reference information
1
Before running the robot, make sure that
all safety protection devices have been
properly configured and installed.
Safety protection devices include the
emergency stop button, safety gate,
safety grating, etc.
2
In the process of robot programming, the
personnel who enter the robot working
area must hold the Teach Pendant.
Personnel outside the working area
must avoid using the Teach Pendant
to operate the robot without
observing the personnel inside the
working area.
3
Before starting the robot program, make
sure that there are not any person in the
robot working area.
4
When programming the robot's motion,
make sure to identify potential collision
risks before the first commissioning.
2.2.3 Safety features
2.2.3.1 Description
This robot system is equipped with a special safety controller for handling safety-related
signals, and provides external safety symbol interfaces such as the safety gate and
emergency stop button.
Signals processed or outputted by the safety controller include:
Emergency stop button signal
Safety gate signal
Enabling switch signal
Mode selection signal
Emergency stop status signal
2.2.3.2 Applicable safety standards
The robot system is designed in accordance with the following relevant standards:
Standard
Description
2006/42/EC
Machinery directive
2014/30/EU
Electromagnetic compatibility directive
EN ISO 12100:2010
Safety of machinery - General principles for design - Risk
assessment and risk reduction

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6 NB25 Series Product Manual
Standard
Description
EN ISO 10218-1:2011
Industrial robots –Safety requirements Part 1: Robots
EN ISO 13849-1:2015
Safety of machinery - Safety-related parts of control
systems –Part 1: General principles for design
IEC 60204-1:2016
Safety of machinery - Electrical equipment of machines -
Part 1: General requirements
IEC 61508-2:2010
Functional safety of electrical/electronic/programmable
electronic safety-related systems - Part 2: Requirements for
electrical/electronic/programmable electronic safety-
related systems
IEC 62061:2010
Safety of machinery - Functional safety of safety-related
electrical/electronic/programmable electronic control
systems
IEC 61000-6-2:2016
Electromagnetic compatibility - Generic standards -
Immunity standard for industrial environments
IEC 61000-6-4:2011
Electromagnetic compatibility - Generic standards -
Emission standard for industrial environments
2.2.4 Motion enabling and safe stop
2.2.4.1 Motion enabling
The motion control function of the robot control system should be enabled by the safety
controller, which, when determining the safety level of the current environment through
internal logic, controls on/off of drive STO (Safe Torque Off) via safety output signal. Manual
operation of the robot by the user and automatic running of the program are not allowed by
the control system before the safety controller determines that it is safe at the moment.
2.2.4.2 Safe stop
There are three ways to stop the robot, i.e. STOP 0, STOP 1 and STOP 2.
Safe stop refers to stop triggered by the safety controller, which only involves STOP 0 and
STOP 1, while STOP 2 can only be triggered by the control system.
STOP 0
As the stop method of the highest safety level, STOP 0 cuts off the power source of the
motors and engages the band-type brakes of individual joints immediately. During the
stopping process, however, the robot is uncontrolled and may deviate from the programmed
path after it is stopped.
Safe stop in manual mode is STOP 0. Safe stop caused by operating mode switchover in
automatic mode is also STOP 0.
STOP 1
Once STOP 1 is triggered, the control system immediately executes the deceleration process
along the programmed path. Thereafter, whether or not the robot comes to a complete stop,
the safety controller will always cut off the power source of the motors and engage the band-
type brakes of all joints. Since the stop is controlled, in most cases, the robot will finally stop
on the programmed path. Therefore, This emergency stop method provides the best
protection for nearby equipment.
Both safe stops arising from the opening of safety gate/safety grating in automatic mode
and pressing of the emergency stop button in automatic mode are STOP 1.

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NB25 Series Product Manual 7
STOP 2
Once STOP 2 is triggered, the control system immediately executes deceleration along the
programmed path until the robot stops completely. The power source of the motors is
maintained and the band-type brakes are still disengaged, while the robot stays in the current
position.
2.2.4.3 Emergency stop
As one of the safe stops, emergency stop is the function of the highest priority in the robot
system. Pressing the emergency stop button triggers the emergency stop function. All other
robot control functions will stop, the robot will stop movement, the power source of the
motors of all joints will be cut off, and the control system will switch to the emergency stop
state. Such state will be maintained until reset.
The emergency stop state means that, except the manual band-type brake release circuit, all
other power supplies to the robot arm body will be cut off and the reset operation must be
executed to restore the system to its normal condition.
Tips
Emergency stop is only used to stop the robot immediately in case of danger and
cannot be used as a normal program; otherwise, extra and unnecessary abrasion will
be caused to the band-type brake system and drive system of the robot to reduce the
service life of the robot.
2.2.5 Safety devices
2.2.5.1 Emergency stop button
Most emergency stop buttons are in red. The most common shape is a mushroom. In general,
a yellow substrate, protective casing or warning sign is also attached to the emergency stop
button. The emergency stop button is mechanically locked when it is pressed. This is the
safety lock mechanism for the button. The device must be reset through manual release.
Most emergency stop buttons are released by rotation and the direction of rotation is
indicated on the button surface. Some buttons also support releasing by upward pulling.
2.2.5.2 Enabling switch
The enabling device is a special switch with two pressing modes and three positions, which
is also called three-position enabling switch (hereinafter referred to as "enabling switch"),
and is used to control on/off of the power supply of the robot in manual mode, thus realizing
motion enabling of the robot.
The enabling switch is installed on the back of the Teach Pendant, as shown in Fig. 1. The
motor power supply is switched on only when the enabling switch is pressed and kept in the
middle position, so that the robot is allowed to move, and you can perform Jog or run
programs. Either releasing or pressing all the way down will cut off the motor power supply.

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8 NB25 Series Product Manual
Fig. 1 Enabling switch
No.
Description
1
Position 1
2
Position 2
3
Position 3
4
Lightly press
5
Heavily press
6
Release
Warning
It is strictly prohibited to use any external devices to keep the enabling switch locked
or stopped in the middle position!
Tips
Under any circumstances, ensure that the enabling switch can work properly.
During programming and debugging, the enabling switch should be released as soon
as possible when robot motion is not required.
2.3 Safety precautions
2.3.1 Overview
2.3.1.1 About the robot
Regardless of the motion velocity, industrial robots pose great potential hazard. A quick and
dangerous motion command may be performed following a pause or waiting during program
running. Even if you know the motion trajectory and mode of the current robot, the motion
trajectory of the robot in auto mode may still be changed by external signals without warning.
Therefore, one must observe the safety specifications when entering the working range of
the robot.
2.3.1.2 About this section
This section will describe some basic safety specifications to the end users of the robot.

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NB25 Series Product Manual 9
However, it cannot cover each specific circumstance due to limited space.
2.3.2 About the user's own safety
2.3.2.1 Basic principles
To ensure safety when using the robot, the following principles must be observed strictly:
The personnel are only allowed to operate the robot in manual mode when they are within
the safety zone of the robot.
You should hold the Teach Pendant in your hands when entering the safety zone of the
robot to ensure that the robot is under your control.
Pay attention to the active tools installed on the robot, such as the electric drill and
electric saw. Make sure that all these tools have stopped running before you approach
the robot.
Pay attention to the workpiece surface or the robot arm body. The motor and casing
temperature of the robot may become very high after prolonged work.
Pay attention to the gripper of the robot and the objects gripped. If the gripper is opened,
the workpiece may fall off and cause personal injury or equipment damage. Moreover,
the gripper used on the robot may be very powerful and may cause injury if it is not used
according to the specification;
Pay attention to the electrical components in the robot control cabinet. Even if the power
supply has been switched off, the remaining power in the component is still very
dangerous.
2.3.3 Safety precautions for operating the Teach Pendant
2.3.3.1 Safe storage of the Teach Pendant
The Teach Pendant no longer used should be removed from the control cabinet and properly
stored in a place that is far away from the robot workstation or control cabinet, so as to
prevent the operator from mistakenly believing that this Teach Pendant is still connected to
the control cabinet and attempting to use it to stop the robot in case of danger.
2.3.3.2 Teach Pendant cable
The Teach Pendant and control cabinet are connected through a Teach Pendant cable.
Please comply with the following requirements when using the Teach Pendant in order to
avoid personal injury or equipment damage:
Make sure that the personnel do not stumble over the Teach Pendant cable so as to avoid
falling of the Teach Pendant or personnel.
Do not squeeze the Teach Pendant cable, otherwise, its internal cores may be damaged.
Do not put the Teach Pendant cable on the edge of sharp objects, otherwise, the cable
sheath may be damaged.
Make sure that the bending radius of the Teach Pendant cable is greater than 100mm,
otherwise, the cable may be damaged.
2.3.3.3 Permission of using the Teach Pendant
The mode selection switch of a standard Teach Pendant is equipped with a key, i.e.
switchover between manual/auto modes is only possible using the key. Please keep the key
properly and carefully consider the user permission of the key. Generally, only those

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10 NB25 Series Product Manual
personnel who have completed safety training and basic operation training can have the
permission to use the key.
Warning
The key to the mode selection switch on the Teach Pendant is designed for all Teach
Pendants of the same model according to standard.
Ensure that all keys are kept by qualified personnel to prevent misuse.
The user permissions for operating the Teach Pendant interface should also be distinguished
to ensure that the debugging personnel and maintenance personnel can use the Teach
Pendant correctly and reasonably according to their work.
Three user levels are built into the control system, namely operator, admin and god. The
operation permissions rank from low to high. A password must be entered when a user with
lower permission level wants to switch to a higher one; but not vice versa. A user of higher
level can modify the password of a same- or lower-level user. You cannot modify the
password of an operator. For the operation contents of different permission levels, refer to
the corresponding control system operation manual.
2.3.3.4 No Teach Pendant mode
When the No Teach Pendant mode is selected for the control system, special attention must
be paid to safety during debugging and programming. An emergency stop button device
must be installed or placed within the reach of the operator and the signal of the emergency
stop button must be routed into the safe IO interface of the robot system so that the person
can protect the safety of himself/herself and the equipment by pressing the emergency stop
button promptly in case of emergencies.
2.3.4 Safety precautions for using the control cabinet
2.3.4.1 Make sure that there is no conductive foreign objects in the control cabinet
After operations such as repair and component replacement on the control cabinet, make
sure to check if there is any conductive foreign object in the cabinet. Such objects may cause
short circuit in the control cabinet during use of the robot, thus resulting in other dangers.
2.3.4.2 Do not supply power to the control cabinet when the cabinet door is open
Make sure that the cabinet door has been closed before switching on the robot control
cabinet.
Not all electrical devices or nodes in the control cabinet are protected. Therefore, do not
use the control cabinet when the cabinet door is open to avoid fatal danger to the
operator or equipment!
The control cabinet cannot reach the claimed protection level when the cabinet door is
open.
When the cabinet door is open, components in the cabinet are more prone to
electromagnetic interference and may generate excessive radiation to the outside, thus
directly affecting the use of the robot system.
2.3.4.3 Do not use the control cabinet for other purposes
The control cabinet is only used to control motion of the robot arm body. Using it for any
other purposes, such as standing on the cabinet body, working on the control cabinet and

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NB25 Series Product Manual 11
using the cabinet body as a ladder, is prohibited.
2.3.5 Emergency stop button test
The emergency stop button is the only means to trigger the emergency stop as well as the
most important device to protect the safety of operators and equipment in case of emergency.
Therefore, when the robot is put into use for the first time and when the robot is started for
the first time after an overhaul, you must first test the emergency stop button, including
testing the external emergency stop button that the integrator has connected into the robot
system, so as to confirm that pressing the emergency stop button can force the equipment
to enter the emergency stop state and executing the reset operation can exit the emergency
stop state.
Only after confirming the normal operation of the emergency stop button can you conduct
configuration or programming on the robot.
2.3.6 Resetting the emergency stop
2.3.6.1 Description
When the system is in the emergency stop state, reset it to return to its normal state. The
reset process is simple but very important. It ensures that the robot system will not be put
into production and operation in a dangerous state.
2.3.6.2 Resetting the emergency stop button
All button-shaped emergency stop devices are equipped with a safety lock mechanism,
which must be released manually after being pressed to reset the emergency stop. Most
emergency stop buttons are released by rotation and the direction of rotation is indicated on
the button surface. Some buttons also support releasing by upward pulling.
2.3.6.3 Operating procedures of resetting the emergency stop
NO.
Operation
1
Confirm that the dangerous conditions causing emergency stop have been
handled properly and the danger is removed.
2
Reset the safety device causing emergency stop.
3
Press the reset button on the control cabinet or click the reset button on the
Teach Pendant/PC interface to recover the system from the emergency stop
state. In auto mode, you can also use the system input signal to reset the system
emergency stop state.
Caution! This operation depends on the control cabinet model. For specific
operations, refer to the corresponding control cabinet product manual and control
system operation manual.
2.3.7 Band-type brake test
When the system enters the emergency stop state, the power source of the motors will be
cut off and the band-type brakes of all joints will engage. Therefore, the normal operation of
the band-type brakes helps ensure the safety of the operator and reduces risks when the
robot enters the emergency stop state.
During daily use of the robot, normal wear will occur to the band-type brakes of individual
joints. It is very necessary to carry out band-type brake tests to ensure its functioning.
The testing method is as follows:

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12 NB25 Series Product Manual
NO.
Operation
1
In manual mode, run each axis to its maximum load position.
2
Press the enabling switch and keep it in the middle position.
Then the motor power supply is switched on and the band-type brakes are
disengaged.
3
Release the enabling switch to engage the band-type brakes.
Observe if the robot arm body keeps its previous position.
You can observe the angle value of each axis through the Teach Pendant to
confirm that the position of each joint remains unchanged.
4
Test each axis one by one.
If the position of each axis remains unchanged, it is believed that the band-type
brake function works well.
2.3.8 Manual release of the band-type brake
When the robot is in the emergency stop state, all other power supplies to the robot arm body
are cut off except the manual band-type brake release circuit. In case of emergency, you can
move the robot arm body by manually releasing the band-type brake.
A band-type bake release button is installed on the standard control cabinet. When this
function is not used, keep the protective cover of this button in place so as to prevent this
function from being triggered mistakenly.
The band-type brake release button is also installed on some models of robot arm bodies.
The method for triggering this function is different based on the models. Please carefully
check the product manual of the corresponding arm body.
Danger
Before manually releasing the band-type brake, make sure that the trapped person and
operator will not be injured during the process of moving the arm body!
Warning
When moving the robot arm body by manually releasing the band-type brake, please
note:
For small-load models, you can manually move each axis of the arm body. For
medium- and large-load models, a traveling crane, a hoist or other equipment should
be used to help move each axis of the arm body.
2.3.9 Safety precautions in manual mode
2.3.9.1 About manual mode
In manual mode, the motion of the robot is under manual control. Only when the enabling
switch is in the middle position can you perform Jog or run programs on the robot.
The manual mode is used to write and debug robot programs and engage in commissioning
of the workstation.
2.3.9.2 Speed limitation in manual mode
The motion velocity of the robot end is limited to less than 250mm/s in manual mode. This
means that the maximum motion velocity of the robot end will not exceed 250mm/s whether

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you perform Jog or run programs on the robot, regardless of the set velocity in the program.
2.3.9.3 Bypass external safety signals
In manual mode, signals of external safety devices such as the safety door and safety grating
will be bypassed, i.e. in manual mode, the system can still perform motor enabling operations
even if the safety door is opened. The system will not prompt the safety door opening
information for the convenience of debugging.
2.3.10 Safety precautions in auto mode
2.3.10.1 About auto mode
The auto mode is used to run robot programs during the formal production process.
In auto mode, the enabling switch will be bypassed, so that the robot can be operated
automatically without personnel involved.
2.3.10.2 Enabling external safety signals
In auto mode, external safety devices such as the safety door and safety grating will be
enabled. When the safety door is opened, the motor power supply will be switched off and
the band-type brake will be engaged.
2.3.11 Safe handling on the production line
In most cases, the robot is a part of the production line. Therefore, robot failures do not only
affect the robot itself, but may also affect the entire production line. Likewise, problems with
other parts of the production line may also affect the robot. For this reason, a fault remedial
plan should be designed by personnel who are very familiar with the entire production line in
order to improve the safety of the whole system.
Pay attention to other devices that interact with the robot
For example, when a robot needs maintenance, you must first remove it from the production
line, as well as remove other devices interacting with the robot, such as the robot loading it.
Pay attention to other running devices around the robot
For example, a robot on the production line grabs workpieces from the conveyor belt. When
the robot fails and in order to guarantee uninterrupted production, the conveyor belt may
keep running while the robot is being repaired. The robot maintenance personnel must pay
extra attention to safety, give advance consideration to the risks that might arise from the
running conveyor belt and develop detailed safety measures for working in such environment.
2.3.12 Safe handling of fire accidents
2.3.12.1 Measures against mild fire
Do not panic and stay calm in case that the fire is expected or has happened but yet to spread;
you can use on-site fire-extinguishing equipment to put out the flame. Do not use water to
put off fires caused by short circuit.
Warning
The fire-extinguishing equipment on the working site of the robot shall be supplied by
the user. The user shall choose appropriate fire-extinguishing equipment according to
the actual situations of the site. For fire with the controller, use a carbon dioxide (CO2)
fire extinguisher.

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14 NB25 Series Product Manual
2.3.12.2 Measures against severe fire
When the fire has spread and become out of control, the personnel on site should
immediately notify other personnel to give up their personal belongings and evacuate from
the emergency exit as soon as possible rather than trying to put out the fire. Do not use the
elevator during evacuation and call the fire brigade during evacuation.
If the clothes catch fire, do not run but quickly lie flat on the ground, and put out the fire using
clothes or other appropriate items or methods.
2.3.13 Safe handling of electric shock accidents
2.3.13.1 Measures against electric shocks
When someone gets an electric shock, do not panic but cut off the power supply as soon as
possible. Appropriate methods and measures should be adopted without hesitation
according to the site conditions:
If the power switch or button is near to the location of the electric shock, switch it off at
once to cut off the power supply.
If the power switch or button is far away from the location of the electric shock, you can
use insulated pliers or an axe, knife and shovel with dry wooden handle to cut off the live
wire on the power side (where the electricity comes from) and keep the cut wire away
from the human body.
If the conducting wire lies on or under the body of the victim, you can use a dry stick,
board, bamboo pole or other tools with insulated handles (to hold) to remove the wire
quickly. Do not use a metal bar or wet object to remove the wire lest the rescuer gets an
electric shock.
Warning
The rescuer should not be in direct contact with the person getting an electric shock,
otherwise, the rescuer may also get an electric shock!
2.3.13.2 Treatment of the wounded personnel after removing the power source
If the wounded is conscious, he/she should lie on the back and be closely observed. The
wounded should not stand or walk around.
If the wounded is unconscious, make him/her lie on the back to keep the airways open.
Call the wounded or pat him/her on the shoulder at an interval of 5 seconds to judge if
he/she loses consciousness. Do not call the wounded by shaking his/her head.
Meanwhile, contact the hospital as soon as possible.
If the wounded loses consciousness, judge his/her respiratory conditions and heartbeat
within 10 seconds. If neither breath nor arterial pulse is sensed, the wounded is deemed
with a cardiac arrest. Give first aid immediately by cardiopulmonary resuscitation.
2.4 Personnel and work content requirements
2.4.1 Definition of personnel
There are three types of personnel:
Operating personnel
The operating personnel can switch on/off the robot power supply and start robot programs