Operation
01.00 | FPS-F5 | Assembly and Operating Manual | en | 15959911 33
The system works by converting the magnetic field into an analog
voltage and digitizing this voltage. These voltage values cannot
generally be assigned directly. To enable direct assignment, the
measured values (in mV) must be converted into the gripper
opening width (in mm). This assignment is carried out once by
entering interpolation points. The sampling points are stored in
the electronic processor and are available to the connected
software.
As the magnetic field is not linear, the ratio of delta (mV) to delta
(mm) changes at each stroke position of the gripper. This means
that absolute tolerances can only be used after calibration.
Working with tolerances in mV is a major source of error and only
works in a very limited range (quasi linear range of the magnetic
field curve).
l
Performing calibration
l
Only work in mm mode
Three interpolation points
Two interpolation points
Values in mm
Values in mm
maximum normalization error
Values in mV
Values in mV
Example of interpolation points
NOTE
The interpolation points must be programmed in the order from
Gripper Open to Gripper Closed. The Gripper Open position
corresponds to support point 1.
1. Enter the number of interpolation points.
ð Standardization in increments of 0.5mm or less is
recommended. The number of interpolation points is
calculated from the formula: Number of interpolation
points = [(gripper stroke/step width) +1].
2. Move the gripper fully open.
3. Enter the opening width in mm and press the Learn button.
4. Press OK.
5. Place the gripper in the next position.
6. Enter the opening width in mm and press the Learn button.
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