GSK GSK928TE User manual


GSK928TEII

TurningMachineCNCSystem


UserManual









GSK928TEⅡTurning CNC System User Manual
1
The user manual describes all items concerning the operation of
the system in detail as much as possible. However, it is
impractical to give particular descriptions of all unnecessary
and/or unavailable works of the system due to the length limit of
the manual, specific operations of the product and other causes.
Therefore, the operations not specified herein may be
considered impractical or unavailable.
This user manual is the property of GSK CNC Equipment Co., Ltd.
All rights reserved. It is against the law for any organization or
individual to publish or reprint this manual without the express written
permission of GSK and the latter reserves the right to ascertain their
legal liability.

GSK928TEⅡTurning CNC System User Manual
2
Dear user,
We are really grateful for your patronage and purchase of GSK928 TEⅡTurning CNC
system made by GSK CNC Equipment Co., Ltd.
Caution
This system can only be operated by authorized and qualified personnel as
improper operations may cause accidents. Please carefully read this user
manual before use!
Before Use:
zConnect the emergency stop button of the system firmly and correctly, otherwise an
emergency stop alarm will occur when switch on the system, so that the system cannot
work properly.
zSet the reference point of the program of the system according to the actual mounting
position of the tool of the machine that the system controls.
Note: The power supply of the system installed in the cabinet is exclusive to GSK’
CNC systems.
Must not take the power supply as other uses, otherwise, there maybe
cause great accidence!
Chinese version of all technical documents in Chinese and English
languages is regarded as final.
All specifications and designs are subject to change without notice.
All rights reserved.
We are full of heartfelt gratitude to you for supporting us in the use of GSK’s
products.

GSK928TEⅡTurning CNC System User Manual
I
Contents
Suggestions for Safety .....................................................................................................................1
Operation............................................................................................................................................7
Chapter One Overview................................................................................................................7
Chapter Two Technical Specifications.......................................................................................8
Chapter Three Operator Panel ...................................................................................................9
Chapter Four System Operation ..............................................................................................14
4.1 System ON/OFF ................................................................................................................14
4.2 CNC System Operating Mode ...........................................................................................15
4.3 EDIT Mode.........................................................................................................................15
4.4 Manual Mode .....................................................................................................................28
4.5 AUTO Mode.......................................................................................................................47
4.6 Parameter Setting..............................................................................................................58
4.7 Tool Offset Setting Mode....................................................................................................69
4.8 Diagnosis ...........................................................................................................................70
4.9 Alarm of Emergency Stop and Overtravel..........................................................................74
4.10 Drive Unit Switch Control .................................................................................................75
Programming...................................................................................................................................76
Chapter 1 Programming Fundamentals ..................................................................................76
1.1 Coordinate Axis and its Direction .......................................................................................76
1.2 Machine Zero.....................................................................................................................76
1.3 Programming Coordinate...................................................................................................76
1.4 Workpiece Coordinate System...........................................................................................78
1.5 Reference Point .................................................................................................................78
Chapter 2 Program Structure ...................................................................................................79
2.1 Character ...........................................................................................................................79
2.2 Word ..................................................................................................................................79
2.3 Block Number ....................................................................................................................80
2.4 Block ..................................................................................................................................80
2.5 Program Structure..............................................................................................................80
Chapter 3 Commands and their Functions.............................................................................81
3.1 G commands — Preparatory Function .........................................................................81
3.2 M function — Miscellaneous Function...........................................................................113
3.3 S function — Spindle Function ...................................................................................... 118
3.4 T Function — Tool Function ........................................................................................ 119
3.5 F function — Feedrate Function .................................................................................120
Chapter Four Programming Rules.........................................................................................121

Contents
II
4.1 Some Commands in One Block.......................................................................................121
4.2 Modal and Initial State of Commands ..............................................................................121
4.3 Other Rules......................................................................................................................122
4.4 Programming Example ....................................................................................................122
4.5 Alarm List.........................................................................................................................129
Appendix 1 GSKRS232 Communication Use........................................................................132
Appendix 2 C5.1 FLASH Chip Copy and Check .................................................................141
Connection.....................................................................................................................................143
Chapter One Interface.............................................................................................................143
1.1 Interface Layout ...............................................................................................................143
1.2 Total Frame......................................................................................................................144
1.3 Total Connection Layout ..................................................................................................145
Chapter Two Interface Function.............................................................................................146
2.1 Specifications...................................................................................................................146
2.2 Interface Graph................................................................................................................147
Chapter Three CNC Device Connection................................................................................148
3.1 X1 Communication Interface............................................................................................148
3.3 X3 Spindle Encoder Interface ..........................................................................................150
3.4 X4 Tool Post Device Interface ..........................................................................................152
3.5 X5 Feed Drive Unit Interface............................................................................................154
3.5.3.3 Pulse signal.....................................................................................................................155
3.6 X Switching Value Input Interface ....................................................................................163
3.7 X7 Switching Value Output ..............................................................................................165
3.8 X7 Spindle Converter Interface ........................................................................................167
Appendix 1 GSK928TEⅡTool post Controller Circuit Diagram.........................................170
Appendix 2 Interface Circuit Diagram....................................................................................171
Appendix 3 Machine Zero Return Mode................................................................................174
Appendix 5 GSK928TEⅡIntegrated Wiring Table...............................................................177
Appendix 6 Appearance Installation Dimension of GSK928TEⅡTurning CNC System ..181

GSK928TEⅡTurning CNC System User Manual
1
Suggestions for Safety
The user must carefully read the suggestions for the system before installing and operating the
system.
The user must follow the suggestions of the system to ensure that the person is not hurt and the
equipments are not damaged.
The user must follow the related suggestions for safety described in the manual, and must not
operate it until the manual is read completely.
Follow safety instructions for the machine that the system will control. Do not run the machine
until you have completely read both the instructions and this manual.
User must follow the suggestions of safety described in the user manual from the machine
manufacture
User can operate the machine or compile the program to control the machine after completely
reading the User Manual and the one from the machine manufacturer.
The power supply of the system installed in the cabinet is exclusive to GSK’ CNC systems. Must
not take the power supply as other uses, otherwise, there maybe cause great accidence!

Safety Warning
2
Ⅰ.Graphic symbol
Caution Operation against the instructions may cause the operator serious injuries.
Alarm Wrong operation may injure the operator and damage the system.
Warning Improper operation may result in damage to the machine, as well its products.
Important information
Shield
Earthing(PE)
Encoder
Coil of contact or relay
Exchange
Connecting terminal

GSK928TEⅡTurning CNC System User Manual
3
Ⅱ. Notes
1）Check before acceptance
Warning ●The damaged or defect product must not be used.
2）Delivery and storage
Warning ●Moistureproof measures are needed while the system is delivered and stored.
Never climb the packing box, neither stand on it, nor place heavy items on it. Do
not put over five packing boxes in piles. Take particular care of the front panel
and the display of the system.
3）Installation
Warning ●Protect the system from sunlight and raindrops. The shell of the system is not
waterproof.
Warning ●Prevent dust, corrosive air, liquid, conductors and inflammable substances from
entering the system.
●Keep the system away from inflammable and explosive substances. Avoid
places where there is powerful electromagnetic interference.
●Install the system firmly without vibration.
4）Wiring
Caution ●Only qualified persons can connect the system or check the connection. The
connecting wires cannot be damaged. Do not press or open the cover of the
system with power on.
Caution ●The voltage and the polarity of connecting plugs must accord with the manual.
●Wet hands are dangerous to grasp the plug or the switch.
Warning ●The connection must be proper and firm.
●The system must be earthed.
5）Debugging
Warning ●Make sure that the parameters of the system is correct before the system runs.
●No parameter is beyond the setting limit in the manual.

Safety Warning
4
6）Operation
Caution ●Only qualified operators can operate the system.
●Ensure the switch is OFF before connecting the power supply.
Warning ●The operator can not leave the system to work alone.
●Do not switch on the system until making sure the connection is correct.
●The emergency stop button is able to disconnect all power supplies when the
system breaks down. Do not switch on/off the system frequently
Warning ●Prevent the system from the environmental interference.
7）Troubleshooting
Caution ●Unqualified persons cannot repair the system.
Warning ●After alarms, do not restart the system until the breakdown is fixed.

GSK928TEⅡTurning CNC System User Manual
5
Ⅲ. Safety Suggestions for Programming
1）Setting a coordinate system
Incorrect coordinate system may cause the machine not to work as expected even if the
program is correct, which may injure the operator, and damage the machine as well as its
tool and workpiece.
2) Rapid traverse (positioning)
When G00 rapid traverse performs the positioning( nonlinear motion to position between
its starting point and end point), make sure that the path for the tool is safe before
programming. The positioning is to perform the rapid traverse, and when the tool and the
workpiece are interfered, the tool, the machine and the workpiece may be damaged, and
even the operator injured.
3) Applicability of user manual
The manual introduces in detail all functions of the system, including optional functions
and max. controllable ranges, which are subject to change with the machine. If there is
any doubt, please read the instruction for the machine。
4) Functions of CNC system and machine
CNC machines depend on CNC systems, but also power voltage cabinets, servo systems,
CNC and the operator panels. It is hard to explain all the integrated functions,
programming and operation. Do not use integrated instructions not included in the manual
until they have been tested successfully.

Safety Warning
6
Ⅳ. Notes and Safety Suggestions for Operating Machine
1）Test the machine without workpieces or tools. Make sure that the machine runs well before
it starts to work.
2）Check the input data of the system carefully before operating the machine. Incorrect input
data may cause the machine to work improperly, so as to damage the workpiece and the
tool, as well injure the operator.
3）Make sure that the input feedrate of the system is suitable for the expected operation.
Feedrate has a maximum for each machine, and the amount of the feed rate is subject to
change with operation. Choose the maximum according to the instructions of the machine.
Improper feedrate leads the machine to work wrongly, so as to damage the workpiece and
the tool, as well injure the operator.
4）When tool compensation is needed, check the direction and the amount of the
compensation. Improper compensation causes the machine to work wrongly, so as to
damage the workpiece and the tool, as well injure the operator.
5）If the machine is to run in Manual mode, check the current position of the tool and the
workpiece, and correctly specify the moving axis, moving direction and the feedrate.
MPG(Handwheel) control with great override, such as 100, may damage the machine and
its tool, even injure the operator.
6）If the tool is return to the reference point, make sure that the machine has been equipped
with the device to detect the reference point, otherwise, the tool can not reach the
reference point, which may damage the machine and its tool, and even injure the operator.

GSK928TEⅡTurning CNC System User Manual
7
Operation
Chapter One Overview
With 480×240 lattice TFT color graphic LCD, GSK 928TEⅡCNC system takes as key control the
high-speed CPU and the complex programmable logic device of super-large-scale integrated
circuits. ISO CNC code is used to write part programs. The system is characterized by μ-level
precision control, a full screen editing, Chinese operation interface, real time demonstration of the
machining process, and high cost-performance ratio. By means of programming, the system can be
used to control stepper motors, so as to machine outer cylinders, end faces, grooves, tapers,
circular arcs, and threads.

Operation Chapter Two System Operator Panel
8
Chapter Two Technical Specifications
2.1 Controlled axes 2 (X, Z axis)
2.2 Link axes 2 (X, Z axis)
2.3 Min. setting unit 0.001 mm
2.4 Min. motion unit X: 0.0005mm; Z: 0.001mm
2.5 Max. dimension for programs ±8000.000 mm
2.6 Max. traverse rate 15000 mm/min
2.7 Feedrate 5-6000 mm/min (G98/G99)
2.8 Capacity of part program 62KB
2.9 Max. number of part programs 100
2.1 Graphic LCD 480×240 lattice TFT color LCD
2.11 Communication interface Standard RS-232
2.12 Tool selection 4（up to 8）
2.13 Compensation Tool compensation, clearance compensation
2.14 MPG(MPG) ×0.001 ×0.01 ×0.1
2.15 Spindle
S1, S2, S3, S4 direct output; S0～S15 output
with BCD code; three automatic gear shifting with
0～10V analog output; 1024p/r, 1200p/r spindle
encoder available
2.16 G codes 24 codes，including the fixed /compound cycles, Z
threading
2.17 Thread functions
Metric/inch single and multiple straight, taper
thread, high-speed retraction with setting the
retraction distance

GSK928TEⅡTurning CNC System User Manual
9
Chapter Three Operator Panel
928TE-II
EDIT JOG AUTO PARAMETER OFFSET DIAGNOSIS
Introduction of GSK 928TEⅡTurning CNC System operator panel as follows:
3.1 LCD display: CNC man-machine dialogue interface. Resolution 480×240 lattice TFT color
LCD display.
3.2 Digit key: input all kind: Input all kinds of data（0-9）.
3.3 Address keys：Input English letters in word addresses of part programs.
3.4 Function keys：All function keys are based on Numerical Control of Machine-Symbol.
INCREASING RAPID OVERRIDE TRAVERSE OVERRIDE: Increase rapid traverse
override in JOG mode and G00 rapid traverse override in AUTO mode.
REDUCING RAPID TRAVERSE OVERRIDE: Reduce rapid traverse override in JOG
mode and G00 rapid traverse override in AUTO mode.
INCREASING FEEDRATE OVERRIDE: Increase feedrate override in JOG mode
and G01 feedrate override in AUTO mode.

Operation Chapter Two System Operator Panel
10
REDUCING FEEDATE OVERRIDE: Reduce feedrate override in JOG mode and G01
feedrate override in AUTO mode.
X PROGRAM REFERENCE POINT(PROGRAM ZERO) RETURN : It is valid in
JOG/AUTO mode.
Z PROGRAM REFERENCE POINT (PROGRAM ZERO) RETURN : It is valid in
JOG/AUTO mode.
X MACHINE ZERO RETURN : It is valid in JOG/AUTO mode.（whether machine zero is
valid is defined by Bit7 of P12 ）.
Z MACHINE ZERO RETURN: It is valid in JOG/AUTO mode.（whether machine zero is
valid is defined by Bit7 of P12 ）.
DRY RUN: In AUTO mode, DRY RUN tests a program without G, S, M, and T functions
output. In EDIT mode, moves the cursor directly to the first character behind the block
number. The machine coordinate data become white from yellow besides LED ON after it
is pressed.
SINGLE BLOCK : A single block runs in AUTO mode.
EDIT mode
JOG mode
AUTO mode
PARAMETER mode

GSK928TEⅡTurning CNC System User Manual
11
OFFSET mode
DIAGNOSIS mode
3.5 Edit/state key
Switch the input method in EDIT mode—- INSERT/REWRITE .
Delete a number, a letter, a block or a whole program.
Cancel the current input all kind of data or escape from the current operation state.
Input all kind of data or select the required or run program or create a new part program.
Press ENTER to confirmation.
PAGE UP: page up to search programs or parameters in EDIT/PARAMETER/OFFSET
operation mode.
PAGE DOWN: page down to search programs or parameters in EDIT/ PARAMETER/
OFFSET mode.
Cursor moving up：the cursor moves up one line in EDIT/PARAMETER/OFFSET mode.
Cursor moving down: the cursor moves down one line in EDIT/PARAMETER/OFFSET
mode.
Cursor moving left: the cursor moves one character position left in EDIT mode.
Cursor moving right: the cursor moves one character position right in EDIT mode.
3.6 Cycle start and feed hold button

Operation Chapter Two System Operator Panel
12
Start and pause programs in AUTO mode.
CYCLE START: Start to run programs in AUTO mode.
FEED HOLD: Motor reduces to pause in JOG or AUTO mode.
3.7 Manual axis control key
The selected axis and its direction in JOG mode:
X axis moves negatively in JOG mode.
X axis moves positively in JOG mode.
Z axis moves negatively in JOG mode.
Z axis moves positively in JOG mode.
RAPID TRAVERSE/FEED Switching rapid traverse and feed.
MANUAL STEP Selecting each step width or MPG feed in STEP/ MPG(Handwheel)
mode.
XMPG(Handwheel) X motion is controlled by the MPG(Handwheel) (when the control
is valid, other control keys related to the axis moving are invalid) .
ZMPG Z motion is controlled by the MPG(Handwheel) (when the control is valid, other
control keys related to the axis moving are invalid).
STEP/JOG mode Switch STEP/JOG mode.
3.8 Manual tool change and auxiliary function keys
Select directly the next tool number and control the machine to complete auxiliary functions as
follows：

GSK928TEⅡTurning CNC System User Manual
13
Spindle rotation (CCW) Spindle rotates counterclockwise.
Spindle stop Spindle stops.
Spindle rotation (CW) Spindle rotates clockwise.
Cooling control Cooling ON/OFF
Spindle gear shifting Select the speed of each gear when the machine is equipped
with multi-gear (up to 16 gears) spindle motor and control
loops.
Toolchange Select the next tool number neighboring to the current one.
Note
： The above-mentioned pressing keys are valid in JOG, AUTO and DIAGNOSIS mode when X,
Z does not move, but only cooling control is valid.
3.9 Reset key
System reset When the system resets, all axes stop motion, all auxiliary function
outputs are invalid, and the machine stops and returns to the initialization.
3.10 State indicator
It indicates the current state of CNC system. There are 15 function keys with LED indicator.
When LED ON, its function of corresponding key is valid, otherwise it is invalid.

GSK928TEⅡTurning CNC System User Manual
14
Chapter Four System Operation
This chapter introduces operations of GSK928TEⅡTurning CNC system. Please read carefully
before operation.
4.1 System ON/OFF
GSK928TE Turning CNC System is not equipped with the system power switch. User installs itⅡ
according to the different machine to avoid bad effects to CNC system owing to the impaction of
power supply.
CNC system is turned on as follows:
1. The master power switch of machine is turned on.
2. Connect with the power switch of the CNC system. Press and the system displays
GSK mark and caption, at the time, the system displays the software and hardware version
number, delivery date by pressing other keys persistently except for the reset key.
CNC system is turned off as follows：
1. The power switch of the CNC is turned off.
2. the power switch of the machine is turned off.
Note : The system should be initialized when it is turned on firstly.
The initialization operations are as follows:
Press the reset key and “9” key, and then release firstly the reset key and then “9” to enter the
debugging window.
1. CNC PAR P01—P26 DY3
2. CNC PAR P01—P26 DA98
3. CLEAR PRO %00—%99
4. DEBUG
5. COPY FLASH 29C010
0. ESC PLEASE INPUT
Pressing 1: initialize the system parameters for stepper motor
Pressing 2: initialize the system parameters for servo motor
Pressing 3: delete all part programs
Pressing 4: enter the system development system
Pressing 5: FLASH copy and check
Pressing 9: escape from the system EDIT menu
Note 1: Measure the machine backlash of X, Z，and input their values to the machine parameters
P07 and P08. For input methods, see Section Operation, Parameter mode.
Note 2: Set P11 according to the electric circuit design and the motor’s direction of the machine.
Note 3: Adjust parameters P05, P06, P17～P22 according to the load of machine, which make it

GSK928TEⅡTurning CNC System User Manual
15
run efficiently and stably.
Fig. 1 System initialization display
4.2 CNC System Operating Mode
GSK928TEII CNC System uses operating mode keys to select directly the operating mode,
which is helpful to directly change operating modes, easy, convenient and direct operations.
After GSK928TE CNC System is switched on, the dynamic display window iⅡs as Fig. 1. The
window is displayed circularly until any key is pressed except for , the system will enter
the operating mode which is that of last power off.
4.3 EDIT Mode
In EDIT mode, the user manually inputs or modifies the content of part program by operation
panel. In EDIT mode, create, select and delete part programs by keyboard, and insert, modify
and delete the content of selected part program. Besides, transmit part programs of the system
to the external PC or the edited part programs of external PC to CNC system by the serial
connection between RS232 communication interfaces and general-purpose PC.
After pressing to enter EDIT mode, the system displays program names of all part
programs stored in the current program, the byte amount contained in current program and the
available memory bytes of system. See Fig. 2: