TOMATECH AUTOMATION
indicator on the operation panel lights up for zero return completion.
� Machine zero return by a proximity switch taken as both deceleration and zero
signals
① Its sketch map is as follows:
Sketch map of zero tongue for machine zero return mode B:
Fig. 2-42-a
Sketch map of zero tongue for machine zero return mode C:
Fig. 2-42-b
② Circuit of the deceleration signal
Chapter 2 Definition and Connection of Interface Signal
337
Ⅲ Connection
Fig. 2-43
③Sequence of machine zero return(taking example of X)
When the BIT0(ZMX) of the bit parameter No.006 are all set to 0, and the BIT5(DECI) of
the bit
parameter No.004 is 0, it chooses the machine zero return mode B.
The sequence of machine zero return is as follows:
Fig. 2-44-a
B type machine zero return process
A: Select the Machine Zero mode, press manual positive or negative (zero return direction
set
by bit parameter No.183) feed key, the corresponding axis will move to the zero at a high
speed(set by parameter No.113).
B: As the proximity switch touches the tongue for the first time, the deceleration signal is
active
and speed immediately slows down and it runs in a fixed low speed(set by parameter
No.33 ).
C: As the proximity switch detaches the tongue, the deceleration signal is inactive, it
moves at a
fixed low speed after deceleration and starts to detect zero signal (PC).
D: As the proximity switch touches the tongue for the second time, the zero signal is active
and
the movement stops. The zero return indicator on the panel lights up for machine zero
return
completion.
When the BIT0(ZMX) of the bit parameter No.006 are all set to 1, and the BIT5(DECI) of
the bit
parameter No.004 is 0, it chooses the machine zero return mode C.
The sequence of machine zero return mode C is shown as follows:
338
Ⅲ Connection
Deceleration switch
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