5. REFERENCE POSITION
If the jog feed (JOG) mode is selected, and a return signal (RTN1n,
RTN2n, or RTN3n) is set to 1, rapid traverse occurs to the reference
position specified by the return signal. If the signal becomes 0 during
rapid traverse, axis movement is decelerated to a stop. When the reference
position is reached, axis movement is stopped completely, and the
reference position return completion output signal (ZPn, ZP2n, or ZP3n)
signal is set to 1.
Before starting to use this function, it is necessary to set up the origin; a
reference position return should be made previously.
The butt–type reference position setting function automates the setting of
a reference position by butting the tool against a mechanical stopper on
an axis. This function is provided to eliminate the variations in reference
position setting that arise when the procedure is performed by different
operators, and to minimize the amount of work involved in making fine
adjustments after reference position setting.
Select the axis for which the reference position is to be set, then perform
cycle start. The following operations are performed automatically:
1. The torque (force) of the selected axis is reduced so that the butting
feedrate is constant. The tool is butted against the mechanical stopper.
Then, the tool is drawn back a parameter–set amount from the
2. Again, the torque (force) of the selected axis is reduced, then the tool
is butted against the mechanical stopper. Then, the tool is drawn back
a parameter–set amount from the mechanical stopper.
3. The point on the axis to which the tool is drawn back is set as the