TOMATECH TAC-100XT - Page 270

TOMATECH AUTOMATION
needed to be detected during machine zero return;
0: Machine zero point is not set on the 5th, 4th, Y, Z, X axes; deceleration signal and zero
point signal
are not detected during machine zero return;
1 8 3 MZR5 MZR4 MZRY MZRZ MZRX
Bit4/Bit3/Bit2/Bit1/Bit0 1: The direction of machine zero return is negative;
0: The direction of machine zero return is positive;
334
Ⅲ Connection
Data parameters
0 3 3 ZRNFLn
The low speed of machine zero return;
1 1 3 REF_SPDn
The high speed of machine zero return;
0 4 7 PRSn
Setting value of absolute coordinate after machine zero return;
� Signal connection
The interior circuit of deceleration signal is shown in Fig. 2-38:
Fig. 2-38
� Machine zero return by regarding servo motor one-turn signal as the zero signal
①Its sketch map is shown below:
Fig. 2-39
② The circuit of deceleration signal
Fig. 2-40
③ Sequence of machine zero return
When the BIT0 (ZMX) of the bit parameter No.006 is set to 0, and the BIT5(DECI) of the
bit
parameter No.004 is set to 0, the system chooses the machine zero return mode B, and
the
deceleration signal low level is active.
So the sequence of machine zero return mode B is shown as follows:
Chapter 2 Definition and Connection of Interface Signal
335
Ⅲ Connection
Fig. 2-41-a
Return process of machine zero mode B
A: Select Machine zero mode, press the manual positive or negative feed key(machine
zero
return direction set by bit parameter No.183), the corresponding axis moves to the
machine zero by a rapid traverse speed (No.113). As the axis press down the
deceleration switch to cut off deceleration signal, the feeding slows down immediately,
and it continues to run in a fixed low speed(No.33).
B: When the deceleration switch is released, the deceleration signal contact is closed