Fagor CNC 8060, Installation Manual

Page: 198 / 698

Installation manual.
CNC 8060
CNC 8065
2.
MACHINE PA
RAMETERS.
Mac
h
ine parameters for
the
axes. Work sets.
·198·
(R
EF
: 1709)
PEAKDISP
Backlash peak cuttoff distance.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and Sercos drives.
Possible values (1): From 0 to 99999.9999 mm.
Possible values (2): From 0 to 3937.00787 inch.
Possible values (3): From 0 to 99999.9999 degrees.
Default value: 0.0050 mm / 0.00508 mm / 0.0050 degrees.
Associated variable: (V.)[ch].MPA.PEAKDISP[set].xn
The CNC only takes this parameter into consideration when working with an additional
velocity command pulse; BAKANOUT other than zero. Parameter PEAKDISP sets the real
distance traveled by the axis after the theoretical movement reversal, where the CNC cuts
the reversal peak off on that axis (additional command pulse).
REVEHYST
Hysteresis for applying the additional command pulse in
movement reversals.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and Sercos drives.
Possible values (1): From 0 to 99999.9999 mm.
Possible values (2): From 0 to 3937.00787 inch.
Possible values (3): From 0 to 99999.9999 degrees.
Default value: 0.
Associated variable: (V.)[ch].MPA.REVEHYST[set].xn
This parameter limits the use of backlash compensation when the CNC detects a movement
reversal so it is not applied every time the CNC receives a reversal command.
This parameter sets the value that the axis position must vary after the first movement
reversal (hysteresis) for the CNC to consider applying backlash compensation. If the axis
does not exceed this margin, the CNC does not apply backlash compensation.
Considerations.
• If REVEHYST=0, Backlash compensation by reversal peak will always be applied on
each reversal.
• If REVEHYST other than 0, and parameter PEAKDISP is used to cut the backlash peak
off, we recommend to set REVEHYST to a lower value than that of PEAKDISP so the
CNC applies the backlash peak.
BAKANOUT
Command to end backlash
compensation (cutoff). The feedback
indicates that the axis has travelled the
distance set in the PEAKDISP
parameters.
[ms]
Command to begin backlash
compensation.
[rpm]
Theoretical position.
Position feedback.
Movement amplitude set by
parameter (PEAKDISP).