
4.REFERENCE POSITION ESTABLISHMENT B-63783EN-1/01
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Reference position resetting
The controlled axis for which parameter GRD (bit 6 of parameter No.
1007) is 0 can be used to set up the reference position any number of
times without turning the power off and on again after positioning to
the grid point is performed in reference position return mode.
1. Place the machine in jog feed mode, then make a movement to a
position near but before a reference position in the direction set by
bit 5 (ZMI) of parameter No. 1006.
2. In reference position return mode, set the feed axis direction
selection signal (+ direction or - direction) for the axis to 1.
3. The grid nearest to the current point is selected, and the absolute-
position detector regards this position as being the reference
position. To prevent the absolute-position detector from storing the
grid as a reference position, set the feed axis direction signal (+
direction or - direction) to 1 again to select the next grid. After a
reference position has been established, set bit 1 (APZ) of parameter
No. 1815 for the absolute-position detector to 1 in MDI mode so that
the absolute-position detector stores the reference position.
4. After step 3, reference position return can be performed by rapid
traverse with the feed axis direction selection signal (+ direction or -
direction) for the axis in the reference position return mode.
Reference position preservation
By using an absolute-position detector (absolute pulse coder), a
reference position, once set, is maintained even if the power is turned
off.
Parameter
#7 #6 #5 #4 #3 #2 #1 #0
1007 DOG GRD
[Input type] Parameter input
[Data type] Bitaxis
# 6
# 6 # 6
# 6 GRD
GRDGRD
GRD Dog-less reference position setting is
0: Performed more than once.
1: Not performed more than once.
# 7
# 7 # 7
# 7 DOG
DOGDOG
DOG In the manual reference position return mode
0: Dog-less reference position setting is disabled.
1: Dog-less reference position setting is enabled.