
14.PMC CONTROL FUNCTION B-63323EN-1/02
- 1340 -
- Feed per revolution
Cutting feed--Specifying feed per revolution (CDxX7 to CDxX0: 12h)
requires the specification of the threading and feed-per-revolution
options.
- Skip--feed per minute
This operation does not save the skip position in a macro variable,
unlike ordinary G31-based skip.
- 1st. to 4th. reference position returns
If the reference position return function is enabled (parameter ZRN (bit
0 of parameter No. 1005) = 0), but no manual reference position return
has been made since power-on, performing a first reference position
return (CDxX7 to CDxX0: 17h) results in an alarm (OT0450) being
issued. If parameter ZRN (bit 0 of parameter No. 1005) = 1, no alarm is
issued. Instead, the machine is set to the first reference position in the
machine coordinate system according to the current machine
coordinate data.
If no manual reference position return has been made since power-on,
performing a second to fourth reference position return (CDxX7 to
CDxX0: 18h to 1Ah) does not result in an alarm being issued even if
the reference position return function is enabled (parameter ZRN (bit 0
of parameter No. 1005) = 0). Instead, the machine is set to the second
to fourth reference position in the machine coordinate system
according to the current machine coordinate data.
In addition, the first to fourth reference position return for PMC axis
control does not set the reference position return completion signal
(ZP1x to ZP4x) to “1” even after the machine is set to the reference
position.
- External pulse synchronization
If external pulse synchronization (CDxX7 to CDxX0: 1Bh) is
specified, the machine moves in the reverse direction when the external
pulse value is negative.