GSK 980MDc, User Manual

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Chapter 2 Interface Signals
321
Ⅲ
Inst
allation
Fig.2-37
③
Action time sequence of machine zero return
When ZMn(n is X,Y,Z,4
th
,5
th
axis) of the bit parameter No.006, ZCn(n=X, Y, Z, 4th) of bit parameter
No.007 and the DECn of the bit parameter No.004 are all set to 0, the deceleration signal low level is valid.
The action time sequence of machine zero return is shown as follows
Fig.2-38
④
Machine zero return process
A
：
Select machine zero return mode, press the manual positive or negative feed key(machine zero
return direction i s set by bit parameter No.13), the corresponding axis moves to the machine
zero by a rapid traverse speed. As the axis press down the deceleration switch to cut off
deceleration signal, the feed slows down immediately, and it continues to run in a fixed low
speed.
B
：
When the deceleration switch is released, the deceleration signal contact point is closed again.
And CNC begins to detect the encoder one-rotation signal, if the signal level changes, the
motion will be stopped. And the corresponding zero indicator on the operator
panel lights up for machine zero return completion
z Machine zero return type B as an proximity switch is taken as both deceleration and zero
signals
①
Its sketch map is shown in the following: