
PROGRAMMING
B–63534EN/02
20. AXIS CONTROL FUNCTIONS
573
CAUTION
1 In automatic phase synchronization, specify the speed in parameter No.7776 and the
movement direction in parameter PHD, bit 7 of No. 7702.
In phase synchronization, rapid–traverse linear acceleration/deceleration (with the time
constant specified in parameter No. 1620) is performed.
The workpiece–axis speed is obtained by superposing the speed in automatic phase
synchronization onto the speed corresponding to spindle rotation.
In consideration of this superposition, specify a position deviation limit in parameter No. 1828.
2 The one–rotation signal used for automatic phase synchronization is issued not by the spindle
position coder but by the separate pulse coder attached to the spindle and used to collect EGB
feedback information. This means that the orientation position based on the one–rotation
signal issued by the spindle position coder does not match the position used as the reference
for the workpiece axis when establishing phase synchronization for automatic phase
synchronization based on G81R2.
Moreover, the one–rotation signal of the separate pulse coder must be turned on for each
rotation of the spindle.
3 With the use of parameter No.7777, the position at which the phase of the workpiece axis is
matched can be shifted from the position corresponding to the one–rotation signal in automatic
phase matching.
4 In automatic phase synchronization, when a synchronization command is issued again in a
synchronization state, movement about the workpiece axis is performed such that the position
corresponding to the one–rotation signal of the spindle matches the position about the
workpiece axis specified in the G81R2 synchronization start command executed first.
5 In automatic phase synchronization, movement is performed about the workpiece axis from the
current position to the nearest phase position in the phase synchronization movement direction
specified by the parameter.
6 Linear acceleration/deceleration applies to synchronization start/cancellation.
7 The acceleration/deceleration plus automatic phase synchronization type can be executed by
the PHS parameter, bit 6 of No.7702, without specifying an R2 command in a G81 or G80 block.
8 In automatic synchronization cancellation due to Reset or P/S alarm (No.000), deceleration is
executed and synchronization is canceled.
9 This item is for spindle EGB.
If the control mode of the master axis is the speed control, it is necessary to execute the position
coder orientation before that the automatic phase synchronization is started. In this case,
RFCHK3 (PRM4016#7) of the master axis must be set “0” to keep memorizing the one–rotation
signal position of the spindle in the speed control mode.
10 This item is for spindle EGB.
If the control mode of the master axis is Cs contouring, it is necessary to execute the reference
point return before that the automatic phase synchronization is started.
11 The acceleration rate parameter(No.2135,2136 or No.4384,4385) must not be changed in the
synchronization mode.
12 Do not cancel the synchronous mode by the reset when this function is used. (Set “1” in
patameter No.7700#0 HBR.)