Fagor CNC 8060, Руководство по установке, Страница: 220 / 698

Installation manual.
CNC 8060
CNC 8065
2.
MACHINE PA
RAMETERS.
Mac
h
ine parameters for
the
axes. Work sets.
·220·
(R
EF
: 1709)
MAXDIFREF
Maximum position difference allowed to consider that there is no
need to home again.
Parameter valid for linear and rotary axes.
Parameter valid for analog drive, Sercos and simulated.
Possible values (1): From 0.0001 to 99999.0000 mm.
Possible values (2): From 0 to 3936.96850 inch.
Possible values (3): From 0.0001 to 99999.0000 degrees.
Default value: 0.0200 mm / 0.00079 inch / 0.0200 degrees.
Associated variable: (V.)[ch].MPA.MAXDIFREF[set].xn
This parameter indicates whether or not the axis must be homed depending on the maximum
position difference allowed.
ABSOFF
Offset with respect to the distance-coded ref. mark.
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.ABSOFF[set].xn
The CNC takes this parameter into account when I0TYPE = Distance coded, when
ABSFEEDBACK = Yes or when the absolute feedback is an RCS-S module.
With linear encoders with distance-coded (I0 reference marks, it is possible to know the
position of the machine by simply moving the axis a distance of 20 or 100 mm. After reading
two consecutive distance-coded reference marks (20 or 100 mm away from each other), it
is possible to know the axis position with respect to the zero point of the graduated glass (C).
In order for the CNC to show the position with respect to Machine Zero (M), this parameter
must be assigned the position of the machine zero (M) with respect to the glass zero point (C).
The zero point of the glass (beginning of the distance code) may be in or out the scale's
measuring length.
EXTMULT
External factor for distance-coded reference marks.
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.EXTMULT[set].xn
The CNC takes this parameter into account if I0TYPE = Distance coded.
This parameter indicates the relationship between the mechanical period (of the graduation
on the glass) and the electrical period (of the feedback signal) being applied to the CNC.
(C) Zero position of the glass.
(M) Machine reference zero position.
Example with a Fagor linear encoder.
A "FOX" type Fagor linear encoder has a graduation period of 100 µm (gap between lines)
and an electrical signal period of 4 µm.
EXTMULT = 100 / 4 = 25