
4. REFERENCE POSITION ESTABLISHMENT
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The tool is moved in the direction specified in parameter ZMI (bit 5 of No.
1006) for each axis by turning the feed axis and direction select signal to
“1” in the manual reference position return mode, and is returned to the
reference position.
Manual reference position return is performed by using a grid method.
The reference position is based on an electrical grid, using on one--rota-
tion signals received from the position detector.
When the option for a workpiece coordinate system is not used, Bit 0 of
parameter 1201 (ZPR) can be set to automatically determine the
coordinate system at manual reference position return. Parameter 1250
can be set to determine the workpiece coordinate system by assigning,
upon the completion of reference position return, the value set in a
parameter to a reference point on the tool holder or the tip position of the
reference tool.
NOTE
Automatic coordinate system setting is not performed if the
option for a workpiece coordinate system is used. In that
case, manual reference position return always establishes
a workpiece coordinate system based on the workpiece
origin offsets, specified with parameters No. 1220 to 1226.
The following signals relate with the manual reference position return:
Manual Reference Position Return
Mode selection MD1, MD2 , MD4
Selection of reference position return ZRN, MREF
Selectionofaxistobemoved
Selection of direction to be moved
+
1, --
1, +
2, --
2, +
3, --
3, ...
Selection of speed to be moved ROV1, ROV2
Deceleration signal for reference
position return
*DEC1, *DEC2, *DEC3, ...
Completion signal for reference
position return
ZP1, ZP2, ZP3, ...
Reference position establis hment
signal
ZRF1, ZRF2, ZRF3, ...
4.1
MANUAL
REFERENCE
POSITION RETURN
General
D Automatic setting of
coordinate system