Darren replied to the topic 'Maximum focus Position' in the forum. 3 years ago

Hi, it can't be increased above 200,000 from the control panel.
I have the panel open now, 
you can't increase it and you can't set a focus position manually above 200,000
whoever wrote the sesto senso driver code, could they just not put another '0' on the max focus position
The sesto senso focuser goes to just over 2 million steps but the driver won't allow above 200,000 steps
the problem I have, is that I'm using a 10 to 1 focuser, so 10 times as many steps as normal.

even if I recalibrated my focuser from all the way in to all the way out, there close to 2million steps and I still won't be able to input a step above 200,000 because that's the maximum limit

I could fake the min/max position and just move my focuser in/out by a set amount, but on a RASA and a EdgeHD, but I have no idea how far in and out is? there are no markings or scales to work off
if I tell my focuser to go all the way in/out,  it takes about 10 or 20 minutes, so it's not an easy task,
I'd rather not damage my scope or focuser waiting for the motor to make a lovely grinding noise when it hits a hard stop.

The Kstars focus calibration routine is useless for my setup, it starts with 'find the middle position' yep good luck finding that on an SCT or RASA ;) 
are you supposed to watch the mirror move and hope you know where the middle is?

Here's Sesto Senso RASA/EdgeHD focuser calibration routine, 
1, Remove Sesto Senso
2, Hand wind it all the way in clockwise, 
3, re-fit Sesto Senso focuser,
4, hit calibrate as That's now Zero

Read More...