ACU-RITE 300S READOUTS - Manual (Page 97)

300S 83
II - 1 Installation Set
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The Factor Field shows the calculated correction factor based on the
measured and standard value.
Press the ENTER key to exit the form and transfer the calculated factor
to the error compensation form, or C to exit without transferring
the factor.
Non-Linear Error Compensation
Non-linear error compensation should be applied if the results of the
comparison with a reference standard show an alternating, or
oscillating deviation. The required correction values are calculated,
and entered in a table. The 300S supports up to 200 points per axis.
The error value between two entered adjacent correction points is
calculated with linear interpolation.
Setup procedure for Non-linear Error
„ The encoder has an inherent count direction. This may not reflect
the user defined count direction, and is only required for
determining the non-linear error compensation.
To establish the inherent count direction for any installed encoder on
a given axis, complete the following:
8 Open the Encoder Setup form, and select the encoder on the axis
that is to be addressed.
8 Arrow down to high light the count direction.
8 Use the POSITIVE/NEGATIVE soft key and select Positive. Press
enter.
8 Using the C key, return to the main display
8 Move the axis that the encoder is mounted on, and note the
direction of movement required for the positive direction.
„ The encoder’s inherent count direction is now established.
Non-linear error compensation is only available on scales
with reference marks. If non-linear error compensation has
been defined, no error compensation will be applied until
the reference marks have been crossed.
Single reference mark encoders must cross the same
reference mark each time the DRO is powered on.