
B-63943EN-1/02 4.REFERENCE POSITION ESTABLISHMENT
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- Requirements when this function is used with feed axis synchronization control
axes
When this function is used with feed axis synchronization control axes,
the distance coded linear scale used for the master axis and that used
for the slave axis must have reference marks placed at identical
intervals.
(Set identical values in parameter Nos. 1821 and 1882 for both the
master and slave axes.)
This function does not work unless the use of this function is specified
for both the master and slave axes (bit 7 (DCL) of parameter No. 1815
is 1).
Also, in all parameters related to this function, except parameter No.
1883, 1884 (distance from the scale zero point to reference position 1,
2), set identical values for both the master and slave axes.
If a parameter value for the master axis differs from the corresponding
parameter value for the slave axis, alarm SV1051 is issued.
NOTE
When this function is used with feed axis
synchronization control axes for which the
operation mode is switched between
synchronization operation and normal operation,
this function is enabled only if the synchronization
select signal (SYNC1, SYNC2, ...) is 1. (During
establishment of a reference position, the
synchronization select signal status must be
maintained.)
- Reference position establishment with feed axis synchronization control axes
With feed axis synchronization control axes, a reference position is
established as follows. When a reference mark for the master or slave
axis is detected, a stop takes place temporarily. Then, a feed operation
is performed again at the reference position return FL feedrate. This
sequence is repeated until a reference mark is detected three or four
times for both the master and slave axes. Then the absolute position is
calculated for both the master and slave axes, and the reference
position establish signals (ZRF1, ZRF2, ...) are set to 1.
After the reference position has been established by the above
operation, a synchronization error is corrected. (Checking for
excessive synchronization error alarm 2 is made even during reference
position establishment.)