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GSK980TDi Turning CNC System User Manual
490
Ⅲ
Connection
the backlash offset can improve the machining precision only by accurate compensation, it is not
recommended to measure it in MPG or Step mode, but the following method is suggested:
z
Program editing (taking example of Z):
O0001
；
N10 G01 W10 F800
；
N20 W15
；
N30 W1
；
N40 W-1
；
N50 M30.
z
Set the backlash error offset to 0 before measuring:
z
Run the program by single blocks, search the measuring benchmark after 2 positioning
operations, record the current data, move 1mm in the same direction, then move 1mm to
point B reversely, read the current data.
Fig. 4-4 Schematic map of backlash measuring method
z
Backlash error offset value= | data of point A –data of point B |; then input its outcome to the
data parameter No.034
（
BKLn
）
(for X axis, multiply 2 and then input the outcome to data
parameter No.034).
Data A: dial-indicator data at point A
Data B: dial-indicator data at point B
Note 1: The backlash offset mode can be set by Bit7 of CNC parameter No.011; the backlash frequency can
be set by Bit6 of parameter No.011 and Bit4, Bit3, Bit2, Bit1, Bit0 of bit parameter No.010.
Note 2: Check the machine backlash every 3 months.
4.8 Tool Post Debugging
GSK980TDi supports various kinds of tool post, and the parameter settings are based on the
machine manual. The parameter settings for the tool post running are as follows:
BIT2(TSGN) of K parameter No.011: high/low level selection of tool post in-position signal, when
the signal is low level active, a parallel pull-up resistor is needed.
Bit3 (CTCP) of K parameter No.011: check/do not check tool post lock signal in tool change;
Bit4 (TCPS)of K parameter No.011: tool post lock signal HIGH/LOW selection;
Bit5 (CHET) of K parameter No.11: check/do not check tool signal;
Data reading
position
A
B
Reverse
position
