Programming manual
88
CNC 8070
5.
TECHNOLOGICAL FUNCTIONS
Feedrate related functions
(SOFT V02.0X)
70
5.2.8 AC-Forward control (G135)
AC-Forward control may be used to improve system response in
acceleration changes and reduce the amount of following error (axis
lag) on the acceleration and deceleration stages.
AC-forward may be applied via machine parameters and via PLC as
well as by program. The value defined by PLC will be the one with the
highest priority and the one defined by the machine parameters will
have the lowest priority.
Programming
G135 Percentage of AC-Forward to be applied
The AC-Forward percentaje is set by G135 followed by the axes and
the new percentage of AC-Forward to be applied to each axis.
The AC-forward values to be applied may be defined with up to one
decimal.
Considerations
The maximum AC-Forward value to be applied is 120%.
The programmed percentages are absolute, in other words,
programming a 50% twice means that 50% will be applied, not 25%.
The value defined with G135 prevails over those defined in the
machine parameters, but not over the one defined by PLC.
Properties of the functions
Function G135 is modal.
On power-up, after an M02 or M30, EMERGENCY or a RESET, the
CNC restores the AC-Forward set by the machine manufacturer for
each axis.
G135 X55.8 Y75 Z110 (Percentage of AC-Forward to be applied:)
(On the X axis = 55.8%)
(On the Y axis = 75%)
(On the Z axis = 110%)
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