Functions
7100.006434_Bus description_PSD4xx_IO_J_ENG
40
2022-09-13
3.7.
Calculate the absolute physical position
The PSD4xxIO 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 to the physical positioning range “mapping end” is
performed via ISDU 120.
Note:
The following explanations concern the variants without auxiliary gearbox. For
variants with auxiliary gearbox, the specified numerical values are reduced accordingly.
When it is delivered the drive is positioned at 0, the upper limit switch is positioned at 805,200, the
lower limit switch positioned at -805,200. This results in a positioning range of ±2013 rotations
(±805,200 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 2,013 rotations in both directions (default ± 805,200 steps).
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 - 805,200), then close the adjustable collar. The drive can now run
4,026 rotations to the right (or top) (default 1,610,400 steps).
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 805,200), then close the
adjustable collar. The drive can now run 4026 rotations to the left (or bottom) (default
1,610,400 steps).
2)
Mount the drive in the required position on the axle, close the adjustable collar, then adjust
the positioning range using ISDU 120. ISDU 120 sets the upper end of the positioning range.
Default setting: upper end at +2016 rotations (position 806,400). If, after mounting the drive,
the positioning range does not match the currently displayed position, you can select the
positioning range b3
…+4029 rotations (measured from the current position) as
required.
