Functions
7100.006424_Bus description_PSD4xx_CA_H_ENG
32
08.04.2020
4.7
Calculate the absolute physical position
The PSD4xx actuator includes an absolute measuring system capable of covering a range
of 4026 rotations. This allows the user to determine the direction of rotation for any desired
portion of these 4026 rotations.
The mapping of the desired positioning range t
o the physical positioning range “mapping
end” is performed via SDO #2028.
Note:
The following explanations concern the variants without gear reducer. For
variants with gear reducer, the specified numerical values are reduced accordingly.
When it is delivered, the drive is positioned at 0, the upper limit switch is positioned at
805200, the lower limit switch positioned at -805200. This results in a positioning range of
±2013 rotations (±805200 steps). If the desired positioning range does not exceed ±2013
rotations, none of the steps described below are required to set the positioning range in the
delivery state.
The following two options are available to allow you to realise any desired positioning run
distances independently of the run distance set by the mounting orientation of the
measurement system (physical positioning range):
1)
Bring the axle to be moved (e.g. a spindle) into the desired position, run
the drive to the appropriate position with the adjustable collar open and
only then close the adjustable collar.
Examples:
a) Bring the axle to be positioned into the mid-position, run the drive in
neutral (with the adjustable collar open) to the mid-position (position
0), then close the adjustable collar. The drive can now run 2013
rotations in both directions (default ±805200 increments).
b) Bring the axle to be positioned all the way to the left (or bottom), run
the drive in neutral (with the adjustable collar open) without a loop to
the smallest position (position -805200), then close the adjustable
collar. The drive can now run 4026 rotations to the right (or top)
(default 1610400 increments).
c) Bring the axle to be positioned all the way to the right (or top), run the
drive in neutral (with the adjustable collar open) to the largest position
(position 805200), then close the adjustable collar. The drive can now
run 4026 rotations to the left (or bottom) (default 1610400
increments).
2)
Mount the drive in the required position on the axle, close the adjustable
collar, then adjust the positioning range using SDO #2028. SDO #2028
sets the upper end of the positioning range. Default setting: upper end at
+2016 rotations (position 806400). If, after mounting the drive, the
positioning range does not match the currently displayed position, you
can select the positioning range b
3 …+ 4029 rotations.
