Following Error - Fagor CNC 8060 Installation Manual

I n s t a l l a t i o n m a n u a l .
2.6.15

Following error.

Following error is the difference between the theoretical position and the actual (real) position
of the axis. The following error decreases when increasing the axis gain.
The more similar (identical) the following errors of interpolating axes are, the better the
machining of curved sections will be on circular interpolations.
FLWEMONITOR
Type of monitoring of the following error (axis lag).
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values: OFF / Standard / Linear.
Default value: Standard.
Associated variable: (V.)[ch].MPA.FLWEMONITOR[set].xn
This parameter determines how the following error will be monitored.
• If set to "OFF", the following error is not monitored, thus no error message will be issued.
• The "standard" monitoring monitors the following error all the time and an error message
will be issued when it exceeds the value of parameter MAXFLWE if the axis is moving
or MINFLWE if the axis is stopped.
• Linear monitoring performs a dynamic supervision that allows a percentage of following
error. This percentage is set by parameter FEDYNFAC.
If this watch 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
watch must be enabled.
MINFLWE
Maximum following error when stopped.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and Sercos drives.
Possible values (1): From 0.0001 to 99999.9999 mm.
Possible values (2): From 0 to 3937.00787 inch.
Possible values (3): From 0.0001 to 99999.9999 degrees.
Default value: 1.0000 mm / 0.03937 inch / 1.0000 degrees.
Associated variable: (V.)[ch].MPA.MINFLWE[set].xn
The CNC takes this parameter into account only if FLWEMONITOR other than OFF.
This parameter indicates the maximum amount of following error allowed when the axis is
stopped. The MINFLWE value cannot be greater than 1/4 of the total axis travel (LIMIT+ to
LIMIT-).
MAXFLWE
Maximum following error when moving.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drives and Sercos drives.
Possible values (1): From 0.0001 to 99999.9999 mm.
Possible values (2): From 0 to 3937.00787 inch.
Possible values (3): From 0.0001 to 99999.9999 degrees.
Default value: 30.0000 mm / 1.18110 inch / 30.0000 degrees.
Associated variable: (V.)[ch].MPA.MAXFLWE[set].xn
The CNC takes this parameter into account only if FLWEMONITOR other than OFF.
The meaning of this parameter depends on the value of FLWEMONITOR.
• With FLWEMONITOR = Standard, MAXFLWE indicates the maximum amount of
following error allowed when the axis is moving.
• With FLWEMONITOR = Linear, MAXFLWE indicates the value starting at which the
following error is dynamically monitored.
2.
CNC 8060
CNC 8065
(R : 1709)
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