Easson ES-9Q, Operation Manual, Page: 40 / 56

CP.PITCH=10mm
CP.STEP=(total travel : 200mm) / CP.PITCH =20
Let's say take X axis an example
after the display digits start
rum, move the projector to
X=0.000, it is the ref mark
position
move the projector across the ref mark of the scale until the digits
display start run.
Please remember the movement of scale must
towards the positive direction.
ref mark
positive direction
2) Locate the CP. START position
The CP. START position is the absolute reference for the internal error compensation calculation of the readout,
it is the start point of the error curve, to make fast, real time calculation possible, the readout assume all internal
error compensation calculations are only in positive direction. Therefore, the CP. START position should be
located in the most negative position of the projector travel, so that all measured position in the error curve are
located in positive position.
i.e. In the example below, we are using a standard glass scale as our measurement standard, the total
measurement travel of the projector 200mm. The glass scale marking pitch is 1mm, we take 10mm
as one measurement step.
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Non-linear error compensation
Polar
XY
Store Recall R/D Print
Enter
Q FINISH
SEL AXIS
112.218
Polar
XY
Store Recall R/D Print
Enter
Q FINISH
X REF X REF
0.000
Polar
XY
Store Recall R/D Print
Enter
Q FINISH
ABS
0.000