4. AUTOMATIC OPERATION
Reverse movement stops when any of the commands or modes listed
below appears. If an attempt is made during forward movement to stop
forward movement with feed hold stop and then move the tool in the
reverse direction when any of the commands and modes below is
specified, the reverse movement completion state occurs.
⋅ Inch/metric conversion (G20/ G21)
⋅ Return to reference position (G28)
⋅ Floating reference position return (G30.1)
⋅ Machine coordinate system selection (G53)
⋅ Advanced preview control (G08)
⋅ Coordinate system setting (G92)
⋅ V command during multiple–workpiece machining
⋅ M code for punch/laser switching
Be sure to specify the radius of an arc with R.
If an end point is not correctly placed on an arc (if a leading
line is produced) when an arc center is specified using I, J,
and K, the tool does not perform correct reverse movement.
1. Never initiate an interrupt during reverse movement.
2. Never perform reverse movement for an interrupte block and the
program that has issure the interrupt.
The retrace function does not support the tool life management funciton.
If the operation mode is switched after a single block stop from memory
operation to MDI operation or vice versa during reverse movement or
forward return movement, reverse movement, forward return movement,
and forward movement can no longer be performed. To restart operation,
return the mode to the original mode, then press the cycle start switch.
When the tool is positioned based on nonlinear interpolation by setting
bit 1 (LRP) of parameter No. 1401 to 0, the path of the tool for reverse
movement does not match the path for forward movement. The path for
forward return movement is the same as the path for forward movement.
When the tool is positioned based on linear interpolation by setting bit 1
(LRP) of parameter No. 1401 to 1, the path of the tool for reverse
movement matches the path for forward movement.
Positioning based on nonlinear
Positioning based on linear
D Block that disables
D Interrupt–type custom
D Tool life management
D Switching automatic
D Positioning (G00)