Specifications

Positioning Drive Setup Ver. 0002 PSU - 7
Is the point with the searched marker pulse. When going over that point, which is
always done at low feedrate PP41 -S41-, the system registers the value of the position
feedback in parameter PV173 -S173- (MarkerPositionA).
PV208 -S408- (ReferenceMarkerPulseRegistered) is activated.
The motor stops.
Is the Machine Zero point for the absolute references. To set the new PV51 -S51-,
set PV175 -S175- (DisplacementParameter) by means of the formula: S175 = S52 +
S150 - S173.
PV203 -S403- (PositionFeedbackStatus) is activated.
The internal position command PV47 -S47- (Position Command) is given the value of the new
position feedback PV51 -S51-.
Finally, the "Position Drive" remains ready to execute absolute movements.
Warning:
After several home searches in a row, the motor may be left in different final positions.
This is because the braking is not always the same, but "home" has always been found
correctly.
Change of the location of point .
Replacing the feedback device or the motor may change the location of the marker pulse. To
keep the same home location, set the offset parameter PP150 -S150-. Determine this offset
based on a known position in the previous reference system.
Note:
Direct feedback.
When the position feedback is obtained through a direct feedback sensor for the
movement (connector X3 of the Drive) some of the parameters mentioned earlier are
replaced by their "twins".
Attending to the motor's own feedback:
PP52 -S52- (ReferenceDistance1)
PP150 -S150- (ReferenceOffset1)
PV51 -S51- (PositionFeedback1)
PV175 -S175- (DisplacementParameter1)
Attending to the Direct Feedback:
PP54 -S54- (ReferenceDistance2)
PP151 -S151- (ReferenceOffset2)
PV53 -S53- (PositionFeedback2)
PV176 -S176- (DisplacementParameter2)
Drive parameters ReferenceDistance and ReferenceOffset are equivalent to axis parameters
"REFVALUE" (P53) and "REFSHIFT" (P47) of the 8050/55 CNC.