
B-63324EN-1/03 OPERATION 14.ABSOLUTE-POSITION DETECTION
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(3) Return to the reference position manually. When tool reaches the
reference position, parameter APZ is automatically set to 1.
(4) Press the reset button. Alarm OT32 is then released.
- Setting the origin with MDI operation
When an absolute pulse coder or servo motor is replaced with another,
the setting of the origin of the absolute pulse coder (association of the
reference position with the counter value of the new absolute pulse
coder) is required.
There are two ways to setting the origin of the absolute pulse coder:
using a manual reference position return, and moving the machine to
the reference position manually and then performing MDI operation
necessary for setting the origin is performed.
The setting of the origin of the absolute pulse coder using MDI
operation eliminates the need for the dog for deceleration for a manual
reference position return or the manual reference position mode
selection switch. It does, however, require some means for ensuring
that the machine is at the reference position.
The origin can be set by moving the machine to the reference position
by means of jog feed or manual handle feed and then specifying the
appropriate parameters from the MDI.
The procedure is as described below:
(1) Set parameter APZ (bit 4 of No. 1815) to "0."
An alarm message "POWER MUST BE OFF" is displayed.
(2) Turn the power off and then on again.
Alarm OT32 NEED ZRN (ABS PCDR) is displayed.
(3) Move the machine to the reference position, using jog feed,
manual handle feed, or manual incremental feed.
(4) Set parameter APZ (bit 4 of No. 1815) to "1."
An alarm message "POWER MUST BE OFF" is displayed.
(5) Turn the power off and then on again.
With the following procedure, the origin is set.
- Removing controlled axes
On the axes on which absolute pulse coders are mounted, controlled
axes cannot be removed. For an explanation of removing controlled
axes, refer to the manual supplied by the machine tool builder.