
20.AXIS CONTROL FUNCTIONS NC FUNCTIONS B-63322EN/03
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20.14 SKIP FUNCTION FOR EGB AXIS(G31.8)
This function validates a skip signal or high-speed skip signal (both
referred to as the skip signal) for the EGB slave axis in the
synchronization mode set by the EGB (Electronic Gear Box) function.
This function has these features.
1. The block with this functin is not interrupted until the skip signal
input has been counted to the commanded times.
2. The movement by synchronization of EGB axis is not stopped by
skip signal input.
3. The value of machine coordinate is stored in the commanded
variable of custom macro when the skip signal is input. And the
total number of times of skip signal inputs is stored in other
commanded variable.
20.15 ROTARY AXIS ROLL-OVER
The roll-over function prevents coordinates for the rotation axis from
overflowing.
In the absolute mode, the specified value is converted to the remainder
obtained by dividing the specified value by 360 degrees. The
difference between the converted value and the current value indicates
the angular displacement. The movement by angular displacement is
always made in the shorter direction. That is, if the difference between
the converted value and the current value is greater than 180 degrees,
the movement to the specified position is made in the opposite
direction. If the difference is 180 degrees, the movement is made in the
normal direction. In the incremental mode, a specified value directly
indicates an angular displacement.
The roll-over function is enabled by setting bit 2 of parameter ROL
1009 to 1.
This parameter can be modified by entering a programmable parameter
(G10).