TOMATECH AUTOMATION
mode. After the rigid tapping return, the tapping spindle returns to the previous control
mode.
④ When the system is in the rigid tapping state, the manual movement tapping spindle
cannot be
performed.
⑤ The rigid tapping state is cancelled in reset or emergency stop.
⑥ In M29, when the 1st or the 2nd spindle is currently used, it is switched into the rigid
tapping state.
In rigid tapping, a spindle should be selected firstly to execute the rigid tapping
interpolation. After
the spindle is switched into the rigid tapping state, the spindle switch is invalid.
⑦ After M29 is execute, M20 and the tapping command in the same block are executed
to clamp
the spindle before drilling or tapping.
Chapter 2 Definition and Connection of Interface Signal
355
Ⅲ Connection
2.8.11 External cycle start and feed hold
� Relevant signal (defined by standard PLC program)
ST: External cycle start signal, whose function is the same with the CYCLE START key on
the
machine panel;
SP: External feed hold signal, whose function is the same with the FEED HOLD key on
the
machine panel, and it shares an interface with SAGT(safety door detect) signal.
� Signal diagnosis
Signal SP ST
Diagnosis address X0.1 X1.4
Interface pin CN61.2 CN61.13
� Signal connection
The interior circuit of SP/ST signal is shown in Fig. 2-48:
Fig. 2-48
� Control parameter
Bit parameter
1 7 2 MST MSP
Bit 6 =1: External cycle start signal (ST) is invalid;
=0: External cycle start signal (ST) is valid;
Bit 5 =1: External stop signal (SP) is invalid;
=0: External stop signal (ST) is valid; the external feed hold switch is needed,
otherwise, “Feed hold” is displayed.
� External connection circuit
The external connection circuit of SP, ST signals is shown in Fig. 2-49:
Fig. 2-49
CN61 socket
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