
B-63944EN/02 OPERATION 3.MANUAL OPERATION
- 921 -
- Procedure for reference position establishment through manual operation
(1) Select the JOG mode, and set the manual reference position
return selection signal ZRN to "1".
(2) Set a direction selection signal(+J1,-J1,+J2,-J2,…) for a target
axis.
(3) The axis is fed at a constant low speed (reference position return
FL feedrate specified by parameter (No.1425) setting).
(4) When the absolute position of linear scale with distance-coded
reference marks (serial) is detected, the axis stops. Then the
absolute position of CNC is calculated and reference position
establishment signal (ZRF1,ZRF2,ZRF3,…) turns to "1".
The timing chart for this procedures is given below.
FL rate
JOG
ZRN
+J1
Reference mark
ZRF1
Feedrate
- Procedure for reference position establishment through automatic operation
If an automatic reference position return (G28) is specified before a
reference position is not established, steps (3) to (4) above are
performed automatically.
After the reference position is established, the automatic reference
position return is performed by setting of parameter RFS No.1818#0.
- Stopping the operation for establishing a reference position
The operation for establishing a reference position is stopped if any of
the following operations is performed in steps (3) to (4), described
above.
- Reset
- Setting the feed axis direction selection signal (+J1, -J1, +J2, -J2,
etc.) to 0
- Setting the Servo off signals (SVF1, SVF2, etc.) to 1
If any of the following operations is performed during the operation of
automatic reference position return (G28) before a reference position
is not established, the operation for establishing a reference position
stops:
- Reset
- Performing feed hold during movement from an intermediate
position
- Setting the Servo off signals (SVF1, SVF2, etc.) to 1
If the operation for establishing a reference position is stopped by an
operation other than a reset, the operation for establishing a reference
position must be reset and resumed.