Specifications

Positioning Drive Setup Ver. 0002 PSU - 11
The manufacturing of linear scales with distance-coded reference marks causes each
feedback device to have a different zero point. To set the coordinate origin at a particular point
of their travel, proceed as follows:
• Do a home search.
• Move the axis to the point selected as zero.
• Reed the PV53 -S53- PositionFeedback2 variable
• Set parameter PP178 -S178- AbsoluteDistance2 to the value read in PV53.
Fagor scales have the following characteristics:
To calculate the values to be given to the parameters:
Thus, for example:
In fact all Fagor scales appearing in this table are adjusted with NP166 = 1000 and NP165 =
1001.
Type
Feedback
signal period
Distance
between I0s
Incremental
distance
between I0s
COC 20 micr 10 mm 20 micr
COVC 20 micr 10 mm 20 micr
COVP 20 micr 10 mm 20 micr
COVS 20 micr 10 mm 20 micr
COVX 4 micr 10 mm 20 micr
COX 4 micr 10 mm 20 micr
FOC 100 micr 50 mm 100 micr
FOP 100 micr 50 mm 100 micr
FOS 100 micr 50 mm 100 micr
FOT 20 micr 50 mm 100 micr
FOX 4 micr 50 mm 100 micr
MOVC 20 micr 10 mm 20 micr
MOVP 20 micr 10 mm 20 micr
MOVS 20 micr 10 mm 20 micr
MOVX 4 micr 10 mm 20 micr
MOVY 2 micr 10 mm 20 micr
NP165 =
(Distance between I0s) x 2 + (Incremental distance between I0s)
(Incremental distance between I0s)
NP166 =
(Distance between I0s) x 2
(Increment distance between I0s)
NP117 = Feedback signal period
Fagor FOP feedback:
NP165 = = 1001
50 · 2 + 0.1
0.1
NP166 = = 1000
50 · 2
0.1
NP117 = 100 microns