Fagor CNC 8060 - Page 114

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Installation manual
CNC 8060
CNC 8065
2.
MACHINE PARAMETERS.
(REF: 1402)
Machine parameters for the axes and spindles.
• Axis tendency watch.
This test watches that the real movement coincides with the theoretical movement, from
the time period set in parameter ESTDELAY. If no theoretical movement has been
programmed for the axis, the test detects whether the axis is moving in one direction
longer than the time indicated in parameter ESTDELAY. If no theoretical movement has
been programmed for the axis, the test detects whether it is moving in the opposite
direction longer than the time indicated by ESTDELAY.
• Runaway protection.
This test watches the real movement of the axis from startup to detect if runs away
considering the time defined in the parameter TENDENCY.
If this alarm is canceled, the CNC shows on power-up a message indicating that this safety
is disabled. This situation can only be allowed during setup; once setup is completed, this
alarm must be enabled.
TENDTIME
Time to detect axis runaway.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and simulated drives.
Possible values: From 0 to 65535.
Default value: 0.
Associated variable: (V.)[ch].MPA.TENDTIME.xn
When the runaway test is active, this parameter defines the time the CNC must wait before
issuing an error message. We recommend to set a short time (about 4 sampling periods)
to prevent the axis from moving too far.
PLC OFFSET.
PLCOINC
PLC offset increment per cycle.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values: From 0 to 99999.9999 mm or degrees / from 0 to 3937.00787 inch.
Default value: 0 (they are assumed instantaneously).
Associated variable: (V.)[ch].MPA.PLCOINC.xn
The PLC offset is an additional compensation over the real coordinate of the axis. The CNC
applies this compensation in a transparent way for the user who will not see it reflected in
the coordinates. A typical utility is to correct the axis dilatations due to temperature.
This parameter indicates whether the CNC assumes the PLC offsets instantaneously in a
sampling period (cycle time) or in steps.
The PLC offset to be applied is set in the variable (V.).PLCOF.xn. The PLC offset applied
so far may be checked in the variable (V.)A.ACTPLCOF.xn.
Example:
It is set PLCOINC = 0.001 mm (one micron per CNC cycle). If the PLC Offset had an initial
value of 0.25 mm and the new value is 0.30 mm, the PLC offset applied per cycle will be:
0.250 0.251 0.252 0.253 · · · 0.297 0.298 0.299 0.300