Home Search - Fagor CNC 8060 Installation Manual

2.6.14
2.
CNC 8060
CNC 8065
(R : 1709)
EF
·218·

Home search.

The home search process depends on the characteristics of the machine.
I0TYPE
Reference mark (I0) type.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values: Not-distance-coded / increasing distance-coded / decreasing distance-coded.
Default value: Not-distance-coded.
Associated variable: (V.)[ch].MPA.I0TYPE[set].xn
This parameter indicates how the reference marks of the linear encoder are read with respect
to the moving direction during the home search.
REFVALUE
Home position.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for analog drive, Sercos and simulated.
Possible values (1): Within ±99999.9999 mm.
Possible values (2): Within ±3937.00787 inch.
Possible values (3): Within ±99999.9999 degrees.
Default value: 0.
Associated variable: (V.)[ch].MPA.REFVALUE[set].xn
The machine reference point must be defined in the following cases:
• The feedback system does not have distance-coded marks.
• The feedback system has distance-coded marks and leadscrew error compensation is
being applied on that axis.
Set the home position referred to Machine Reference Zero.
REFSHIFT
Offset of the reference point (home).
Parameter valid for linear and rotary axes.
Parameter valid for analog drive, Sercos and simulated.
Possible values (1): Within ±99999.9999 mm.
Possible values (2): Within ±3937.00787 inch.
Possible values (3): Within ±99999.9999 degrees.
Default value: 0.
Associated variable: (V.)[ch].MPA.REFSHIFT[set].xn
Sometimes, to readjust the machine, it is necessary to take down the feedback device, thus
when putting back up, the new home point might no coincide with the previous one. Since
the home point must still be the same, the difference between the new point and the old point
must be assigned to parameter REFSHIFT . This way, when the axis finds the I0, it moves
the distance indicated in REFSHIFT and at that point updates its coordinate to the value of
REFVALUE.
The value to be set in REFSHIFT must be measured without leadscrew compensation being
active because it is considered to be a correction to the encoder position value.
When the axes are position-Sercos; during parameter matching, the CNC sends the value
of parameter REFSHIFT to the drive so it takes it into account; this way the CNC coordinate
and that of the drive will be the same.
I n s ta ll a t io n ma n u a l.