WEIHONG NK280 User manual

NK280 Integrated CNC System
Manufacturers’ Manual
2nd Edition
Weihong Electronic Technology Co., Ltd.

The copyright of this manual belongs to Weihong Electronic Technology Co., Ltd. (hereinafter referred to as
Weihong Company). This manual and any image, table, data or other information contained in this manual may
not be reproduced, transferred, or translated without any prior written permission of Weihong Company.
The information contained in this manual is constantly being updated. You can login to the official website of
Weihong Company http://en.weihong.com.cn to download the latest PDF edition for free.
Second Edition, February, 2016
XXX Printing, XX, XXXX
158 pages

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Weihong Electronic Technology Co., Ltd.
Specialized, Concentrated, Focused i
Preface
About This Manual
This manual is intended for manufacturers and end-users. If you use the CNC system for the first
time, you need to read through the manual. If you are experienced with the system, you can search for
the desired info via the contents.
With 8 chapters, this manual can be divided into 5 parts, as follows:
1) Precautions part. This part mainly lists the notices of storage and transportation, installation and
wiring, usage and so on. Users should read them carefully to ensure safe operation.
2) Hardware part, including chapter 1, 2 and 6. Chapter 1 and 2 mainly talk about product
configuration and hardware introduction of NK280. While chapter 6 refers to driver parameters
and terminal board wiring diagrams of different brands.
3) Software operation part. Chapter 3 and 4 introduces software interface and operation
corresponding to each function and lists related parameters and setting notes. After reading
through this part, users will learn the operation menus and commands.
4) Maintenance part. Chapter 5 talks about maintenance information so that users can take
corresponding steps in case of breakdown.
5) Appendix part, including chapter 7 and 8. Chapter 7 lists all the parameters while chapter 8
contains the software license agreement.
Applicable Product Models
This manual is applicable to NK280 integrated CNC system. Refer to the table below for details.
Product Model
Remarks
NK280 integrated CNC
system
Abbreviated as NK280; system in this manual refers to NK280
integrated CNC system, if there is no particular explanation.
Nk280 integrated CNC system, as introduced in this manual, can
serve as control system for standard four axes system (namely, for
machines with X/Y/Z/A axes) as well as Dual Z axes system
(namely, for machines with X/Y/Z1/Z2 axes). Furthermore, through
continuous market research and exploration, Weihong Company
has successfully upgraded NK280 system into control system for
key cutting machine and knife grinder machine. If you are
interested, please contact us for more information.
Contact Us
You can contacts us by the following info for technical support and pre-sales/after-sales service:
Company Name: Weihong Electronic Technology Co., Ltd.
HeadquartersAddress: No.1590, Huhang Rd., Fengxian, Shanghai, PRC 201400
Tel: +86-21-33587550
Fax: +86-21-33587519
Website: http://en.weihong.com.cn

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Revision History
You can refer to the following table for the revision records of each edition. Please note that content
in this manual is subjected to change.
Date
Edition
Revision
2016.02
R2
Contact information updated.
2015.07
R1
Released for the first time.
Precautions
Precautions can be divided into caution and warning according to the degree of loss or injury in case
of negligence or omission of precautions stipulated in this manual.
CAUTION
: general info, mainly for informing, such as supplementary instructions and
conditions to enable a function. In case of negligence or omission of this kind of precautions, you may
not activate a function. Note that in some circumstances, negligence or omission of even this kind of
precautions could cause physical injury or machine damage.
WARNING
: warning info which you must comply with. In case of negligence or omission
of this kind of precautions, you may suffer physical injury, or even death, machine damage or other
losses.

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WARNING
1) Precautions Related to Storage and Transportation
The products should be transported properly in terms of the weight;
An excess of specified quantity of stacking products is prohibited;
Climbing, standing or placing heavy loads on the products is prohibited;
Dragging or carrying the products via cables or devices connected to them is prohibited;
2) Precautions Related to Installation
Only when this equipment installed in the qualified electricity cabinet can it be used. The
construction of the cabinet must reach IP54 grade of protection;
Paste sealing strips on the joint of the cabinet to seal all the cracks;
Cable entry should be sealed while easy-to-open on the spot;
A fan or heat exchanger should be adopted for the heat dissipation and air convection of the
cabinet;
If a fan is adopted, air strainer is a must in air inlet or air outlet;
Dust or cutting fluids may have access to the CNC device via the tiny cracks and tuyere.
Therefore it is necessary to pay attention to the surroundings and air flow direction of the air
vent to make sure that the outflow gas is towards pollution source;
100 mm space should be preserved between the back of the CNC device and the cabinet wall
for plugging cable connected with the device and the ventilation & heat dissipation in the
cabinet;
Space between this device and other equipments should also be preserved according to the
requirements;
The product should be installed firmly and without vibration. During installing, casting,
knocking, striking, or loading on the product is forbidden;
To reduce electromagnetic interference, power-supply components used should be above AC
or DC 50V and the space between cable and CNC device should be preserved above 100mm;
It will be better if CNC device is installed at a position facilitating debugging and maintenance.
3) Precautions Related to Wiring
Only qualified people are allowed to participate in the wiring and checking;
The CNC device should be grounded reliably and grounding resistance should be less than 4
ohm. Neutral line is absolutely not allowed to replace earth wire. Otherwise, it may result in
malfunction of the device due to the interference;
Wiring should be firm and steady, or misoperation may occur;
Voltage values and positive & negative polarity of any connection plug should be in accordance
with specifications set forth in the manual, or it may result in breakdowns such as short circuit
and permanent damage to the device;
To guard against electric shock or CNC device damage, fingers should keep dry before
plugging or touching switch;
The connecting wire should not be damaged and squeezed, or the leakage or short circuit may
occur;

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WARNING
It is prohibited to plug or open the chassis of CNC device when power on.
4) Precautions Related to Running & Debugging
Parameters setting should be checked before running, since wrong setting may lead to
accidental movements;
Modification to parameters should be within the allowable range, or such breakdowns as
unsteady running and machine damage will occur.
5) Precautions in Use
Before power-on, please make sure that the switch is on blackout to avoid occasional start-up;
Please check the electromagnetic compatibility during electrical design in order to avoid or
reduce electromagnetic interference to the CNC device. A low pass filter should be employed
to reduce electromagnetic interference if there are other electrical devices nearby;
It is not allowed to frequently power on and power off. It is recommended to power up the
machine again at least one (1) minute later after power failure or blackout.
CAUTION
1) Precautions Related to Product and Manual
Matters related to restrictions and functions available stipulated in the manuals issued by the
machine manufacturer is prior to those in this manual;
This manual assumes adding all optional functions, which you must confirm through manuals
issued by the machine manufacturer;
Please refer to manuals issued by the machine manufacturer for the instructions of machine
tools;
Functions, and software interfaces vary with the system and the version of software. Before
using the system, you must confirm specifications.
2) Precautions When Opening the Package
Please make sure whether the products are what you have ordered;
Check if the products are damaged in transit;
Check if the components and accessories are damaged or missing in terms of the detailed list;
Please contact us promptly if product discrepancy, accessory missing or transit damage
occurs.

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Contents
1SUMMARIZATION ................................................................................................................................... - 5 -
1.1 HARDWARE INTRODUCTION .......................................................................................................................... - 6-
1.1.1 A Picture of NK280.............................................................................................................................- 6 -
1.1.2 System configuration .........................................................................................................................- 6 -
1.1.3 Mounting Dimension .........................................................................................................................- 6 -
1.1.4 Host of NK280....................................................................................................................................- 7 -
1.1.5 Connection Schematic Diagram.......................................................................................................- 11 -
1.2 SOFTWARE INTRODUCTION ......................................................................................................................... - 12 -
2WIRING................................................................................................................................................. - 13 -
2.1 BASIC CONCEPTS OF SIGNAL........................................................................................................................ - 14 -
2.1.1 Signal Types .....................................................................................................................................- 14 -
2.1.2 Binary Input .....................................................................................................................................- 15 -
2.1.3 Binary Output ..................................................................................................................................- 15 -
2.1.4 Analog Output .................................................................................................................................- 17 -
2.2 WIRING SPECIFICATION OF TERMINAL BOARD ................................................................................................ - 17 -
2.2.1 Wiring Diagram of Terminal Board..................................................................................................- 18 -
2.2.2 Port Specification of Terminal Board ...............................................................................................- 21 -
2.2.2.1 Standard 4-axis System................................................................................................................................ - 21 -
2.2.2.2 Dual Z System .............................................................................................................................................. - 22 -
2.3 PORT DEFINITION AND WIRING SPECIFICATION ............................................................................................... - 24 -
2.3.1 Driver Interface Definition ...............................................................................................................- 24 -
2.3.2 Handwheel Interface Definition .......................................................................................................- 26 -
3MANIPULATION .....................................................................................................................................- 27 -
3.1 DEBUGGING STEPS.................................................................................................................................... - 29 -
3.2 ADJUSTMENT OF AXIAL DIRECTION AND PULSE EQUIVALENT ............................................................................. - 30 -
3.2.1 Axial Direction Adjustment ..............................................................................................................- 30 -
3.2.2 Pulse Equivalent Adjustment ...........................................................................................................- 30 -
3.2.3 Upper & Lower Limit Setting of Workbench Stroke..........................................................................- 32 -
3.3 RETURNING TO MACHINE ORIGIN ................................................................................................................ - 34 -
3.3.1 Principle of Motion of Returning to Machine Origin........................................................................- 34 -
3.3.2 Parameters Specifications................................................................................................................- 37 -
3.3.3 FAQ & Troubleshooting ....................................................................................................................- 38 -
3.4 SPINDLE PARAMETERS ADJUSTMENT............................................................................................................. - 40 -
3.5 PORT POLARITY ADJUSTMENT ..................................................................................................................... - 42 -
3.6 TOOL MEASUREMENT................................................................................................................................ - 44 -
3.6.1 Software Interface ...........................................................................................................................- 44 -
3.6.2 Mobile Calibration ...........................................................................................................................- 45 -
3.6.3 Fixed Calibration ..............................................................................................................................- 46 -
3.6.4 First Calibration/ Tool Calibration after Tool Change.......................................................................- 47 -
3.7 OFFSET SETTING....................................................................................................................................... - 49 -

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3.7.1 WCS (Workpiece Coordinate System) ..............................................................................................- 49 -
3.7.2 Extended WCS..................................................................................................................................- 50 -
3.7.3 Software Interface ...........................................................................................................................- 50 -
3.8 CENTERING.............................................................................................................................................. - 53 -
3.9 ADJUSTMENT OF VELOCITY &ACCELERATION ................................................................................................. - 54 -
3.9.1 Feedrate Setting...............................................................................................................................- 54 -
3.9.2 Traverse Speed Setting (G00 Speed Setting) ....................................................................................- 54 -
3.9.3 Parameters Specification .................................................................................................................- 54 -
3.10 SIMULATION &TRACK ............................................................................................................................... - 57 -
3.10.1 Simulation....................................................................................................................................- 57 -
3.10.2 Motion Trace................................................................................................................................- 58 -
3.11 COMPENSATION ....................................................................................................................................... - 59 -
3.11.1 Screw Error Compensation ..........................................................................................................- 59 -
3.11.2 Tool Compensation ......................................................................................................................- 63 -
3.11.3 Across Quadrant Error (AQE) Compensation ...............................................................................- 65 -
3.12 LOG AND DIAGNOSIS ................................................................................................................................. - 67 -
3.12.1 Log ...............................................................................................................................................- 67 -
3.13 PROGRAM FILE MANAGEMENT.................................................................................................................... - 68 -
3.13.1 Program Wizard ..........................................................................................................................- 68 -
3.13.2 Part Statistic ................................................................................................................................- 69 -
3.13.3 Program File ................................................................................................................................- 69 -
3.14 HANDWHEEL OPERATION ........................................................................................................................... - 75 -
3.14.1 Handwheel Mode ........................................................................................................................- 75 -
3.14.2 Handwheel Guide ........................................................................................................................- 75 -
3.15 SYSTEM MANAGEMENT ............................................................................................................................. - 77 -
3.15.1 System Info ..................................................................................................................................- 77 -
3.15.2 Network Connection ....................................................................................................................- 77 -
3.15.3 Language.....................................................................................................................................- 77 -
3.15.4 Register........................................................................................................................................- 77 -
3.16 NETWORK CONNECTION AND SHARE ............................................................................................................ - 79 -
3.16.1 IP Setup........................................................................................................................................- 79 -
3.16.1.1 Direct Connection or Switch Connection................................................................................................... - 79 -
3.16.1.2 Router Connection .................................................................................................................................... - 82 -
3.16.1.3 Multiple NK280 Connection ...................................................................................................................... - 83 -
3.16.2 Connection Verification Setup .....................................................................................................- 83 -
3.16.3 NK280 Network Files Management by PC via FTP.......................................................................- 84 -
3.16.4 NK280 Network Files Management by PC via Network Sharing .................................................- 84 -
3.17 AUXILIARY FUNCTION ................................................................................................................................ - 86 -
3.17.1 Single Block..................................................................................................................................- 86 -
3.17.2 Start Line (Selective Processing) ..................................................................................................- 86 -
3.17.3 Breakpoint Resume......................................................................................................................- 86 -
3.17.4 Parameter Auto Backup...............................................................................................................- 86 -
3.17.5 User Code Input (MDI) .................................................................................................................- 87 -
3.17.6 Coordinate Backup ......................................................................................................................- 87 -
3.18 TOOL MAGAZINE ...................................................................................................................................... - 90 -

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3.18.1 Auto Tool Change of Linear Tool Magazine .................................................................................- 90 -
3.18.2 Auto Tool Change of Circular Tool Magazine ...............................................................................- 91 -
3.18.3 Related Parameters .....................................................................................................................- 92 -
4NK280 FOR DUAL Z-AXES MACHINE ...................................................................................................... - 93 -
4.1 MULTIPLE ZAXES CONTROL ........................................................................................................................ - 94 -
4.1.1 Mode Selection ................................................................................................................................- 94 -
4.1.2 Tool Measurement ...........................................................................................................................- 95 -
4.2 SPECIAL PARAMETERS ................................................................................................................................ - 95 -
5MAINTENANCE ......................................................................................................................................- 97 -
5.1 OPERATING SYSTEM MAINTENANCE ............................................................................................................. - 98 -
5.1.1 Updating Mirror Image....................................................................................................................- 99 -
5.1.2 System update .................................................................................................................................- 99 -
5.1.3 BOOT Update Interface ..................................................................................................................- 101 -
5.2 WARNING INFORMATION ......................................................................................................................... - 103 -
5.3 COMMON TROUBLESHOOTING .................................................................................................................. - 105 -
5.3.1 What should users do if the spindle does not rotate? ...................................................................- 105 -
5.3.2 What should users do if an axis does not move?...........................................................................- 105 -
5.3.3 What should users do if servo motor Z brake can’t be opened? ....................................................- 105 -
5.3.4 What should users do if machine tool returns to the machine origin abnormally?.......................- 105 -
5.3.5 What should users do if the machine tool motions upward after arriving at the position of tool
presetter during calibration? ..............................................................................................................................- 106 -
6DRIVER ................................................................................................................................................- 107 -
6.1 DRIVER PARAMETERS............................................................................................................................... - 108 -
6.1.1 Parameter Setting of WISE Servo Driver ........................................................................................- 108 -
6.1.2 Parameter Setting of YASKAWA Σ–
Ⅱ
Servo Driver .......................................................................- 109 -
6.1.3 Parameter Setting of YASKAWA Σ-
Ⅴ
/Σ-7 Servo Driver ..................................................................- 111 -
6.1.4 Parameter Setting of PANASONIC MINAS A4 Servo Driver ............................................................- 112 -
6.1.5 Parameter Setting of PANASONIC MINAS A5 Servo Driver ............................................................- 113 -
6.1.6 Parameter Setting of MITSUBISHI MR-JE Servo Driver ..................................................................- 115 -
6.1.7 Parameter Setting of MITSUBISHI MR-E Servo Driver....................................................................- 116 -
6.1.8 Parameter Setting of DELTA ASDA-A Servo Driver..........................................................................- 117 -
6.1.9 Parameter Setting of DELTA ASDA-B Servo Driver..........................................................................- 119 -
6.1.10 Parameter Setting of DELTA ASDA-A2 Servo Driver....................................................................- 120 -
6.1.11 Parameter Setting of DELTA ASDA-B2 Servo Driver....................................................................- 122 -
6.1.12 Parameter Setting of SANYO PY Servo Driver ............................................................................- 124 -
6.1.13 Parameter Setting of SANYO R Servo Driver ..............................................................................- 126 -
6.1.14 Parameter Setting of SANYO Q Servo Driver.............................................................................. - 127 -
6.1.15 Parameter Setting of KT270 Servo Driver ..................................................................................- 128 -
6.1.16 Parameter Setting of FUJI FALDIC-β Servo Driver ......................................................................- 130 -
6.1.17 Parameter Setting of STONE GS Servo Driver ............................................................................- 131 -
6.1.18 Parameter Setting of TECO TSDA Servo Driver ..........................................................................- 132 -
6.2 WIRING DIAGRAM OF NK280 HOST AND DIFFERENTIAL INPUT STEPPING DRIVER............................................... - 133 -
6.3 WIRING DIAGRAM OF DRIVER AND TERMINAL BOARD ................................................................................... - 134 -

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6.3.1 Wiring Diagram of WISE Servo Driver ...........................................................................................- 134 -
6.3.2 Wiring Diagram of YASKAWA AC Servo Driver ...............................................................................- 135 -
6.3.3 Wiring Diagram of PANASONIC AC Servo Driver............................................................................- 136 -
6.3.4 Wiring Diagram of MITSUBISHI MR-JE Servo Driver......................................................................- 137 -
6.3.5 Wiring Diagram of MITSUBISHI MR-E Servo Driver .......................................................................- 138 -
6.3.6 Wiring Diagram of DELTA Servo Driver ..........................................................................................- 138 -
6.3.7 Wiring Diagram of FUJI Servo Driver .............................................................................................- 141 -
6.3.8 Wiring Diagram of HITACHI Servo Driver.......................................................................................- 141 -
6.3.9 Wiring Diagram of SANYO PY Servo Driver....................................................................................- 142 -
6.3.10 Wiring Diagram of SANYO R Servo Driver .................................................................................- 142 -
6.3.11 Wiring Diagram of KT270 Servo Driver......................................................................................- 143 -
6.3.12 Wiring Diagram of STONE GS Servo Driver................................................................................- 143 -
6.3.13 Wiring Diagram of TECO TSDA Servo Driver..............................................................................- 144 -
6.3.14 Wiring Diagram of TECO ESDA Servo Driver..............................................................................- 144 -
7PARAMETER OVERVIEW.......................................................................................................................- 145 -
8SOFTWARE LICENSE AGREEMENT ........................................................................................................- 151 -

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1 Summarization
1.1 HARDWARE INTRODUCTION .......................................................................................................................... - 6-
1.1.1 A Picture of NK280.............................................................................................................................- 6 -
1.1.2 System configuration .........................................................................................................................- 6 -
1.1.3 Mounting Dimension .........................................................................................................................- 6 -
1.1.4 Host of NK280....................................................................................................................................- 7 -
1.1.5 Connection Schematic Diagram.......................................................................................................- 11 -
1.2SOFTWARE INTRODUCTION ......................................................................................................................... - 12 -

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1.1 Hardware Introduction
1.1.1 A Picture of NK280
Fig. 1-1 A picture of NK280
1.1.2 System configuration
NK280 integrated system consists of the following components:
One host of NK280
One EX9A4 or EX24A2 terminal board
One DB9M/F cable (length custom)
Servo cable (brand, length and quantity decided by customers)
NK-MPG-06 Handwheel (optional)
Note:
The above lists the system components of standard configuration and the final receiving should be subject to the
receipt list.
The extended terminal board EX26A is optional.
1.1.3 Mounting Dimension
After NK280 is installed on the machine tool, 100 mm space should be preserved in its surrounding
for wiring convenience. Please ensure ventilation in the cabinet. And the mounting dimension is shown
in Fig. 1-2:

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390
310
130 130
408
320
66
112,2
274
362
Fig. 1-2 Mounting dimension of NK280 integrated system
1.1.4 Host of NK280
Front View of NK280
E-stop Button
Mode Buttons
Operation Buttons
USB Interface
Spindle Rate
Knob Feedrate
Override Knob
Extended Buttons
Keyboard
Function Buttons
User Interface
Manipulation
Buttons
Auxiliary Buttons
Fig. 1-3 Front view of NK280

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User interface: interactive, simple and user-friendly design, featuring convenient operation.
Operation buttons: including ―State‖, “Advanced‖, ―Program‖, ―Parameters‖, and ―System‖.
Keyboard: each letter key contains one bigger letter and smaller letter, the smaller locating at the
top left while bigger one, which supports capital entering only, at the lower right. If you want to enter
the bigger letter, just press the corresponding letter key; for the smaller one, pressing the shift key
and the letter key simultaneously is required.
The Num keys can also work as axis feeding buttons, as follows:
X1
7Z+ X1
8Y+ X1
9IV+
X1
4X- X1
5X1
6X+
X1
1Z- X1
2Y- X1
3IV-
X1
*V+ X1
'0 X1
& 。
V-
In auto and home mode, the Num buttons are
used to enter number.
In manual, jog and stepping mode, the Num
keys are used to manipulate the movement of
corresponding axes. Among them, the num key
―5‖is used to switch between the manual high
speed and manual low speed.
System operation buttons: including insert, back space, delete and so on.
Mode selection buttons: shown as below:
Auto JOG Handle REF. Point
The operation mode can be divided into 4
types: auto mode, manu mode and REF. point
mode. The manu mode can be further divided
into jog mode, stepping mode and handwheel
mode.
XUD X10 X100X1
Stepping mode buttons
XUD:custom step length.
X1:step length of 0.001 mm or inch。
X10:step length 0.01 mm or inch。
X100:step length of 0.1 mm or inch。
Auxiliary buttons: mainly including:
Simulate
SIM
Single Block HW Guide
Used for simulation, single block and
handwheel guide respectively.
Simulate
SIM
Single Block HW Guide
Controlling workpiece cooling, air and
lubrication switch respectively.

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ATC CW ATC CCW Light
Tool magazine manipulation buttons,
controlling tool magazine CW/CCW.
Light, used to control the lamp on/off.
CW CCWStop
Controlling the spindle start/stop.
E-stop button: in case of danger, pressing this button will power off and stop the machine to ensure
the safety of the operators and machines. Press down this button to make machine stop
immediately and turn the button in clockwise direction to cancel E-stop.
Extended buttons: used for extended functions, including [K1], [K2], [K3], available for the extension
of custom functions.
Feedrate override knob / spindle rate knob: used to adjust the feedrate override and spindle
rotational speed. For details, refer to chapter 3.4 and 3.9.1.
USB interface: take off the nut cap and connect USB equipment.
Manipulation buttons: including F1~F7.
Note:
When the indicator light at the top left is on, it means the corresponding function is activated.
Rear View of NK280
The rear view of NK280 with its interface definition is shown as below.
24V power
interface
DC INPUT
24V2A
+24V
COM
X Y Z 4Axis 5Axis
端子板接口
(I/O Board
Interface) 手轮(MPG) 网口(LAN0)
To X
driver To Z
driver To 5-axis
driver
To Y
driver To 4-axis
driver To I/O
board
To MPG
Network
interface
Fig. 1-4 Rear view of NK280
24V power interface: connected to 24V DC power.
To X driver: connected to the driver of X axis.
To Y driver: connected to the driver of Y axis.
To Z driver: connected to the driver of Z axis.

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To 4-axis driver: connected to the driver of the fourth axis;
To 5-axis driver: connected to the driver of the fifth axis.
To I/O board: connected to the terminal board. Refer to chapter 2.2 for the terminal board
specifications.
To MPG: connected to the handwheel.
Network interface: connected to the PC via the network cable.

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1.1.5 Connection Schematic Diagram
C
N
3
C
N
2
C
N
1
The connection
of Y/Z/4-axis/5-
axis port is
similar to that of
X axis.
Extended Terminal Board
EX26A3
Servo
Motor
Servo
Driver
To 24V
MPG
DC INPUT
24V2A
+24V
COM
X Y Z 4Axis 5Axis
端子板接口
(I/O Board
Interface) 手轮(MPG) 网口(LAN0)
Spindle
Motor
Terminal Board
EX9A4
Inverter
Fig. 1-5 Connection schematic diagram

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1.2 Software Introduction
Based on embedded operating system, NK280 can be used as 4-axis system, dual Z axes system,
system for key cutting machine and system for knife grinder machine respectively according to different
hardware configurations and software versions. This manual takes the standard 4-axis system as an
example as a whole, and the unique features of other systems will be introduced separately.
The software user interface consists of five function areas, which can be chosen and switched
through the function buttons at the right of the interface. Here just lists the brief introduction to each
function area. For more details, please refer to the following chapters.
State
Including [Coor], [Motion Trace], [Current Program] and [Part Statistic] altogether 4 screens. You
can set frequently used parameters, execute common and auxiliary operations, view the machining path
and statistics in this function area.
Advanced
Including [Coor-Manage], [Centering], [User Code Input] three screens. Coordinate-related
operations can be done here, such as building and choosing coordinate system, offset operation,
centering operation, backing to the fixed point and machine origin, direct input of command and so on.
Program
Including [Local Program], [USB File], [Program Wizard] altogether 3 screens. In this area, you can
manage all the program files both in local disk and in movable disk. Besides, program wizard is provided
to generate standard program file by simple setting of parameters.
Parameter
Including [Machine Parameter], [Parameter Backup], [Coordinate Backup], [Compensation] 4
screens. In this area, you can view, set and back up parameters, save and load workpiece coordinate,
set tool compensation and screw error compensation.
System
Including [Port], [Log], [System info], this area provides ports information, log information and
system information.

上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
Specialized, Concentrated, Focused - 13 -
2 Wiring
2.1 BASIC CONCEPTS OF SIGNAL........................................................................................................................ - 14 -
2.1.1 Signal Types .....................................................................................................................................- 14 -
2.1.2 Binary Input .....................................................................................................................................- 15 -
2.1.3 Binary Output ..................................................................................................................................- 15 -
2.1.4 Analog Output .................................................................................................................................- 17 -
2.2 WIRING SPECIFICATION OF TERMINAL BOARD ................................................................................................ - 17 -
2.2.1 Wiring Diagram of Terminal Board..................................................................................................- 18 -
2.2.2 Port Specification of Terminal Board ...............................................................................................- 21 -
2.2.2.1 Standard 4-axis System................................................................................................................................ - 21 -
2.2.2.2 Dual Z System .............................................................................................................................................. - 22 -
2.3 PORT DEFINITION AND WIRING SPECIFICATION ............................................................................................... - 24 -
2.3.1 Driver Interface Definition ...............................................................................................................- 24 -
2.3.2 Handwheel Interface Definition .......................................................................................................- 26 -

上海维宏电子科技股份有限公司
Weihong Electronic Technology Co., Ltd.
- 14 - Specialized, Concentrated, Focused
2.1 Basic Concepts of Signal
2.1.1 Signal Types
The signal types of NK280 system can be divided into the following 4 types: binary input signal,
relay output signal, differential output signal and analog output signal.
Binary Input Signal
Binary input signal is active low and supports NO and NC input signals (through modifying input port
polarity in the software). Conducting to GND (i.e. grounding signal) in NO connection means signal
detected, and disconnecting with GND in NC connection means signal detected.
Note:
1) NK280 standard 4-axis system also supports high level effective, if this function is needed, please choose the
related terminal board EX6A4; at this time, conducting to 24V in NO connection means signal detected, and
disconnecting with 24V in NC connection means signal detected.
2) NK280 dual Z system, system for key cutting machine and system for knife grinder machine do not support high
level effective.
Relay Output Signal
The relay output contact points on the terminal board have load capacity: 10A/250VAC and
10A/30VDC, which can control 220VAC load of low power. If high power load is needed, a contactor can
be used. Please see Fig. 2-1.
Machine Tool
(Example)
CON
COM
N.C
N.O
Terminal Board
Control
Output
AC
Fig. 2-1 Connection of relay output and contactor
Differential Output Signal
Differential signal refers to two equivalent signals with opposite phases sent by driving end, and the
voltage difference of these two signals is used for deciding whether the logical status of differential signal
is ―0‖ or ―1‖.
Pulse command format of controlling driver motion is pulse + direction, negative logic. And this
signal adopts differential signal transmission mode.
Analog Output Signal
SVC is controllable voltage output of 0~10V and externally connected with analog voltage frequency
command inputs of inverter. Therefore altering the controllable voltage leads to inverter frequency
change and a change of inverter frequency will change the spindle speed.
Table of contents
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