Measuring the Focuser Backlash
It is relatively easy to measure the focuser backlash. The following
example uses ASICAP as the software application driving the EAF:
Set the coarse step size to 1000 and the fine step size to 10.
Click the Coarse Button and move the focuser out by 1000 steps.
Next set the fine tuning steps to 10 and move the focuser in and
observe that the focus knob on the side of the focus rotates.
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