
6. INTERPOLATION FUNCTION
B--63003EN--1/02
506
To the contrary to P/S alarm No. 221, P/S alarm No. 194 occurs if
anotherNC control spindle function is specified during the two--spindle
polygon synchronization mode.
CAUTION
1 The maximum spindle speed for each gear stage (No. 3741
to 3744) must be specified correctly according to the model
of the machine. In addition, ordinary spindle connections
must have been terminated.
2 This function uses the one--rotation signal for the spindle as
a reference point for phase adjustment.
When a built -- in sensor is used, and there are gears
between the spindle and spindle motor, it is necessary to
install a detector on the spindle separately to take a
one-- rotation signal from the spindle. If the detector does
not guarantee detection of a correct position from arbitrary
speed, set bit 4 (PHST) of parameter No. 7602 and bit 7 of
serial spindle parameter No. 4016 to 1. This setting reduces
the spindle speed automatically down to 0 for spindle
position detection each time the spindle--spindle polygonal
turni ng mode is entered, thus guaranteeing a cor r ect phase
rel ati ons hi p during spindl e--spi ndl e polygon synchr oni z ati on
mode.
3 This function uses the spindle synch ronization function for
serial spindles. (However, it does not require the spindle
synchronization option for the CNC.) You may need to
specify the relevant serial spindle parameters (such as Nos.
4032 to 4035).
Specify the same serial spindle loop gain for both spindles.
If the same serial spindle loop gain is not used for both
spindles, polygonal turning may not be accurate.
If an attempt is made to perform spindle--spindle polygonal
turning, DGN 470#6 LGE becomes 1. (No alarm is issued.)
4 Before using the polygon synchronization mode, place both
first and second spindles in the spindle control mode. The
polygon synchronization mode cannot be used if they are
already in other modes (Cs contouring control mode or
spindle orientation mode, etc.).
5 During the polygon synch ronization mode, the speed of the
second spindle cannot be controlled independently of the
speed of the first spindle.
During the polygon synchronization mode, the spindle
ori entati on func ti on (ORC M A< G070#6>, ORCMB< G074#6>)
cannot be used for either the firs t spindle or second spindl e.
Therefore, gear, tool or wo r k piec e change is basically
unusable during the polygon synchronization mode.
Caution