Fagor 8025 GP, Operating Manual

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Page Chapter: 1 Section:
LASER MACHINES 5
1.3 SHEETMETAL TRACING
When using this feature, it is necessary to set machine parameter P622(6) to "1".
With this feature it is possible to keep the focusing distance of the laser beam constant,
thus achieving an optimum machining quality even on very wavy sheetmetal surfaces.
To do this, a sensor must be used attached to the axis of the laser beam. This sensor
will provide, at all times, the feedback signals indicating to the CNC the deviations
of the actual sheetmetal surface with respect to its theoretical value.
The axis supporting the focus of the laser beam must be set as the "Z" axis and the
feedback signals of the sensor must be connected through the "V" axis feedback
input. Also, the "V" axis must be set as a DRO axis by means of machine parameter
“P617(3)=1”.
The CNC offers miscellaneous (auxiliary) functions M97, M98 and M99 which have
the following meaning when working with this feature (sheetmetal tracing):
M97 to activate the "sheetmetal tracing" feature. This function is used when
the counting directions of the Z and V axes are the same.
M98 to activate the "sheetmetal tracing" feature. This function is used when
the counting directions of the Z and V axes are not the same.
M99 to end or cancel the "sheetmetal tracing" feature.
The machine parameters to be set when using this feature are:
P619(3) Analog S output proportional to actual axis feedrate.
P622(6) Sheetmetal tracing on laser machines.
P806
Beam focusing distance (between beam and sheetmetal).
P807 Maximum sheetmetal deflection.
P808 Analog voltage corresponding to maximum Z axis feedrate.
Whenever the "sheetmetal tracing" feature is used, the CNC behaves as follows:
1.- When M97 or M98 is executed, the CNC will activate this feature.
2.- The laser beam (Z axis) will move towards the sheetmetal until the sensor attached
to it makes contact with the sheetmetal surface.
The maximum feedrate to be used in this approach move is set by machine
parameter "P808".
As a safety measure, the Z axis must be moved before executing M97 or M98.
Otherwise, the CNC will issue error 102.
SHEETMETAL TRACING