
4.AUTOMATIC OPERATION OPERATION B-63324EN-1/03
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(5) If the direction of movement is reversed as a result of a manual
handle interrupt, backlash compensation is applied. In this case,
pitch error compensation is applied to the position set after the
interrupt.
(6) For a manual handle interrupt, the application of acceleration/
deceleration is based both on the cutting feed acceleration/
deceleration (parameter No. 1622) and jog feed acceleration/
deceleration (parameter No. 1624). When bit 0 (MNJ) of parameter
No. 1604 is set to 1, however, the time constant for jog feed
acceleration/deceleration is disabled, so that the application of
acceleration/deceleration for a manual handle interrupt is based only
on the time constant for cutting feed acceleration/deceleration.
- Manual handle interrupt and coordinate systems
(1) The workpiece and local coordinate systems are shifted by the
magnitude of a manual handle interrupt. Therefore, when an absolute
command is specified in a workpiece or local coordinate system, the
end point is shifted by the magnitude of the interrupt.
All workpiece and local coordinate systems are shifted by the same
amount at the same time regardless of which coordinate system has
been selected when the interrupt is performed.
(2) A manual handle interrupt does not change the basic machine
coordinate system. Therefore, the end points of an absolute command
(G53) and automatic reference position return (G28) issued in the
machine coordinate system are not affected by the manual handle
interrupt.
(G90G54wwww)
(G90G53wwww)
(Basic machine coordinate system)
(Workpiece and local coordinate systems after interrupt)
(Workpiece and local coordinate
systems before interrupt)
interrupt
Programmed path
Manual handle
interrupt
Shift by manual
handle interrupt
Fig. 4.13 (a) Fixed cycle
(3) The magnitude of the manual handle interrupt can be cleared by
presetting the workpiece coordinate system (G92.1).
- Position display
1 The following table shows the relationship between movement by
handle interruption and position display data: