
B-63943EN-1/02 4.REFERENCE POSITION ESTABLISHMENT
- 485 -
- Setting the reference position without dog when the absolute-position detector
loses the reference position
When an absolute-position detector is provided [bit 5 (APCx) of
parameter No. 1815 is set to 1] and the reference position is lost [bit 4
(APZx) of parameter No. 1815 is set to 0], an alarm (DS0300) is
issued.
As described in "Basic Procedure for Setting the Reference Position
Without DOG," feed the tool to point P in the figure below in the jog
feed mode.
Then, put the machine into the manual reference position return mode
and set the reference position without dog.
+J1 or -J1
Grid
ZP1
Feedrate
Manual reference position return
mode
FL rate
.
.
..
.
PRef.
Upon the completion of setting the reference position without dog, the
tool is positioned at a grid point and point Ref. in the figure is used as
the reference position.
The correspondence between the machine position and reference
position for the absolute-position detector has been established, and
the reference position is also established. [Bit 4 (APZx) of parameter
No. 1815 is set to 1.]
Then, reset the system to release the alarm (DS0300).
With the first reference position return without dog, the
correspondence between the machine position and position in the
absolute-position detector has been established.
Bit 4 (GRDx) of parameter No. 1007 can be set to 1 to set the
reference position without dog twice or more when an alarm
(DS0300) is issued due to absolute-position detection.
Bit 4 (APZx) of parameter No. 1815 remains set to 0 after the
reference position is set without dog and the tool reaches the reference
position.
As shown in the figure below, reference position return without dog is
repeated from P2 to P3 and P4 until the tool reaches point Ref used as
the reference position.