I’m going to be trying to use auto-focusing for first time tonight. During a daylight test run I’ve noticed that the focuser has a measurable difference when moving it outwards vs inwards for the same number of steps. i.e. if i move the focuser outwards 10,000 steps, and then inwards by 10,000 steps, it will keep turning for a couple of seconds after racking all the way in.
Will SGP be able to handle this? I’m not sure how it works under the hood. Does it try and build the V-curve, then use absolute positioning to return to the point of best focus? If so, that’s going to be inaccurate in my case.
Note that this a direct-drive system and there’s no backlash present in the system, so I can’t simply set up backlash compensation.