Universal Robots ur3 User manual

Installation Guide
ORIGINAL INSTRUCTIONS (EN)
Version 1.3.3
Robot:
CB-Series: UR3, UR5, UR10
e-Series: UR3e, UR5e, UR10e, UR16e
Control Box:
CB-Series: Control Box, Control Box Merge
e-Series: Control Box, OEM AC, OEM DC

All rights reserved 1 Installation Guide (en) 1.3.3
The information contained herein is the property of Universal Robots A/S and shall not be
reproduced in whole or in part without prior written approval of Universal Robots A/S.
The information herein is subject to change without notice and should not be construed as a
commitment by Universal Robots A/S. This manual is periodically reviewed and revised.
Universal Robots A/S assumes no responsibility for any errors or omissions in this
document.
Copyright © 2009–2020 by Universal Robots A/S
The Universal Robots logo is a registered trademark of Universal Robots A/S.

All rights reserved 2 Installation Guide (en) 1.3.3
Table of Contents
1. Purpose ......................................................................................................................3
1.1 Disclaimer..........................................................................................................3
1.2 Company details ................................................................................................3
1.3 How to use this guide.........................................................................................3
2. Mechanical Set Up......................................................................................................4
3. Payload / Center of Gravity Offset...............................................................................5
4. Motion Control.............................................................................................................6
4.1 Acceleration .......................................................................................................7
4.2 Speed.................................................................................................................7
5. I/O Ports......................................................................................................................8
5.1 Inputs and Outputs.............................................................................................8
6. Programming ..............................................................................................................9
6.1 Processing.........................................................................................................9
6.2 Protective Stop.................................................................................................10
6.3 UR+/URCaps ...................................................................................................10
6.4 Interfaces.........................................................................................................10
6.5 Safety...............................................................................................................11

All rights reserved 3 Installation Guide (en) 1.3.3
1. Purpose
This installation guide is intended for experienced personnel to review existing robot
installations or design and review new robot integrations. It is very important that the robots
are installed properly and with good programming practice. Therefore, this document is
designed as a "checklist". Please always go through the complete guide to ensure that
everything was checked and considered.
1.1 Disclaimer
This document does not replace Universal Robots documentation. This document does not
guarantee completeness of all considerations for proper installation. The installation
parameter values specified here are intended as starting points for installation and should
not be interpreted as specifications or limits. These values can change with future versions
by further findings. This approach is intended to simplify and structure the robot integrations
and robot installation auditing.
1.2 Company details
Universal Robots A/S
Energivej 25
DK-5260 Odense, Denmark
Tel.: [phone]
Fax: [phone]
1.3 How to use this guide
Step 1: Check the condition of the first fields for relevance. "YES" means it should be
checked for all applications.
Step 2: Read description and compare with installation. If differences are visible, correct
them.
Step 3: If you need more information or details, go to the appendix.
Step 4: Put initials into checklist field.
Step 1
Step 2
Step 3
Step 4
Relevant
Description
Further Information
Checked
YES
Mount the robot on a sturdy surface strong
enough to withstand at least ten times the
full torque of the base joint and at least five
times the weight of the robot arm.
Furthermore, the surface shall be vibration
free.
UR User Manual
Chapter “Mounting”
UR Support Site
Article “Max. joint
torques”

All rights reserved 4 Installation Guide (en) 1.3.3
2. Mechanical Set Up
Relevant
Description
Further Information
Checked
YES
Mount the robot on a sturdy surface strong
enough to withstand at least ten times the
full torque of the base joint and at least five
times the weight of the robot arm.
Furthermore, the surface shall be vibration
free.
UR User Manual
Chapter “Mounting”
UR Support Site
Article “Max. joint
torques”
YES
Is robot mount in an environment suited for
the IP rating?
The robot must be operated in
environments that fulfill the required IP
ratings of Robot Arm, Teach Pendant and
Control Box.
UR User Manual
Chapter “Technical
Specifications”
UR Support Site
Article “IP (Ingress
Protection) ratings
report UR3, UR5 and
UR10”
Linear Axis?
YES
NO
If the robot is mounted on a linear axis or a
moving platform then the acceleration of the
moving mounting base shall be very low. A
high acceleration might cause the robot to
stop, thinking it bumped into something.
It is recommended to keep the robot joints
stationary while the linear stage is in motion,
especially during accelerating and
decelerating. The validation that robot joints
are stationary (steady) can be done by
using script function “is_steady()”.
It also might be helpful to keep the robot in
more of a folded-up pose versus extended
(to avoid accidental protective stops).
UR User Manual
Chapter “Mounting”
UR Support Site
Article “7th Axis
Gravity Settings”
UR Script Manual
function “is_steady()”
YES
Please go through inspection plan in
Service Manual and follow all recommended
inspections. By doing this you can eliminate
many possible failures.
UR Service Manual
Chapter “Preventive
Maintenance”

All rights reserved 5 Installation Guide (en) 1.3.3
3. Payload / Center of Gravity Offset
Relevant
Description
Further Information
Checked
YES
Payload and Center of Gravity must be set
correctly. The maximum allowed payload of
the robot arm depends on the center of
gravity offset. The center of gravity offset is
defined as the distance between the center
of the tool output flange and the center of
gravity of the total payload (tool +
workpiece).
Example for UR5 –CB3
UR User Manual
Chapter “Maximum
Payload” & “Payload”
& “Center of Gravity”
UR Support Site
Article “Setting
payload and center of
gravity when using
multiple TCPs”
YES
The Payload and Center of Gravity must be
always adjusted when a workpiece is picked
up or dropped off.
The script command from the Script Manual
can be used for this purpose.
"set_payload(m, cog)"
UR User Manual
Chapter “Payload”
& “Center of Gravity”
UR Script Manual
function
“set_payload()”
UR Support Site
Article “Setting
payload and center of
gravity when using
multiple TCPs”

All rights reserved 6 Installation Guide (en) 1.3.3
4. Motion Control
Relevant
Description
Further Information
Checked
YES
Program the trajectories of the robot
smoothly and continuously to avoid
disruptive movements.
Blends should be programmed with at
least 15 mm if there is no special
requirement by application (e.g. Gluing).
UR User Manual
Chapter “Command:
Fixed Waypoint”
MoveP used?
YES
NO
While the robot is moving through the
waypoints with constant speed, the robot
cannot wait for either an I/O operation or
an operator action. Some smart gripper
commands will also impose a wait on the
program execution, so this is something to
also be aware of.
Doing so might stop the robot motion or
cause a protective stop.
If a wait is necessary, stop robot with script
command "stopl()".
UR Support Site
Article “Circular path
using MoveP/MoveC”
UR Script Manual
function “stopl()”
Skipped
Waypoint
entries in the
log file?
YES
NO
Waypoints in the program that are too
close to each other or whose blend is too
large are skipped during program
execution. This is logged as a warning
message in the Log File.
e.g. warning message:
“Overlapping Blends in a MoveL, a
waypoint was skipped”
Adjust blend configuration in specific
waypoints.
UR Support Site
Article “Circular path
using MoveP/MoveC”
Loops or If
command
where "Check
expression
continuously"
is selected?
YES
NO
The robot should not be stopped abruptly.
This can occur due to a jump out of the
program section where “check expression
continuously” is enabled.
Realize the continuous expression check
without interrupting the movement. If
interrupt is necessary script commands
“stopl()/stopj()” can be used.
UR Script Manual
function
“stopl()/stopj()”

All rights reserved 7 Installation Guide (en) 1.3.3
4.1 Acceleration
Relevant
Description
Further Information
Checked
YES
It is generally advised to avoid the use of
accelerations higher than needed for a
given application. High accelerations,
especially in combination with high loads,
can lead to reduced lifetime of the robot.
Acceleration values are advised to be below
800 °/s² or below 2500 mm/s².
It is good practice to choose a reasonable
ratio between speed and acceleration
depending on the distance of the waypoints.
UR User Manual
Chapter “Product
warranty”
4.2 Speed
Relevant
Description
Further Information
Checked
YES
For applications with short cycle times and
high requirements on speed, it is generally
advised to use blends as much as possible
to ensure smooth trajectories without the
need for high accelerations.
It is recommended to use large radii when
high speed is used and good practice to
choose a reasonable ratio between speed
and acceleration depending on the distance
of the waypoints.
UR User Manual
Chapter “Product
warranty”

All rights reserved 8 Installation Guide (en) 1.3.3
5. I/O Ports
5.1 Inputs and Outputs
Relevant
Description
Further Information
Checked
YES
Check all terminals for proper connection.
Terminals should not be loose. You should
also take caution that the shield of the wire
(if present) is not contacting any terminal
connections.
Incorrect or loose connection of these
terminals can result in problems with the
signals.
UR User Manual
Chapter “Controller
I/O”
Controller
I/O used?
YES
NO
Be sure that the current per single I/O is not
above the maximum allowed value.
Be sure that the total current used by all I/O
is not above the maximum allowed.
If there is a need for larger current supplying
capacity than can be supplied by internal
power supply unit use an external power
supply unit and make sure the 24 V jumper
is properly configured and that the internal
24 V supply of the robot is not tied to the
external 24 V supply. It is not good practice
to have the outputs of two different 24 V
power supplies connected together.
UR User Manual
Chapter “Controller
I/O”
UR Support Website
Article “Connecting
internal inputs and
outputs (I/O) on the
robot’s controller”
Tool I/O
used?
YES
NO
Be sure that the current per single I/O is not
above the maximum allowed value.
Be sure that the total current used by all I/O
is not above the maximum allowed value.
UR User Manual
Chapter “Tool I/O”
Safety
devices
connected?
YES
NO
Check mismatch time settings on safety
signals on external safety devices. Note that
dual channel safety outputs are switched
with a maximum delay of 8 ms within the
UR robots safety IO and an internal error
message is triggered after 48 ms. A value of
20 ms is recommended for setting the
mismatch on safety inputs on external
devices (like Safety PLCs).
UR Support Website
Article “Scan time for
CB3 and e-Series
controller I/O”

All rights reserved 9 Installation Guide (en) 1.3.3
6. Programming
6.1 Processing
Relevant
Description
Further Information
Checked
Threads or
Events used in
the program?
YES
NO
Many parallel or computationally-
intensive processes can put additional
strain on the robots control software. The
use of threads should be carefully
considered, and overuse might cause
the PolyScope GUI to seem slow and
unresponsive. Efficient programming is
important.
UR User Manual
Chapter ”Event” &
”Thread”
Switch/case
Used?
YES
NO
Verify that switch case statements are
used in a non-stressful way on robot.
Do not use blend in last or first
waypoints in cases. It could cause
problems when jumping through cases.
UR User Manual
Chapter “Switch“
Does robot
show “runtime
error / infinite
loop”?
YES
NO
This error happens due to the fact, that
all operations do not necessarily use
physical time code segments that
execute only one command repeatedly
might cause the runtime interpreter to
view this command sequence as an
infinite loop.
Use wait command or sync() function for
avoiding runtime errors.
UR Script Manual
function “sync()”
UR Support Site
Article “Runtime
error/Infinite loop”