Question UPAS - backlash?

Hi,

I'm having a lot of difficulty getting the UPAS to align (using NINA/3PPA). The Altitude seems to work perfectly, however the Azimuth seems to jump around a lot.

If I nudge +1 at a time slowly, then I see no real updates in alignment. If I nudge +1 rapidly it overshoots. It's almost like there is backlash in the device - could this be the case?

I'm completely unable to use the automated NINA plugin as it times out before alignment is reached (because of the above issue - I assume the plugin nudges very slowly).

I'm using Gear Ratio 2, Speed 1000 as recommended in the manual/guide. My mount is a Rainbow Astro RST 135E.

I noticed someone else on these forums complaining of a similar issue.

As I say, Altitude works perfectly - its only Azimuth.

Any help or suggestions very greatfully received.

Cheers,

Duncan

I'm not saying it is backlash - just the behaviour I am observing where moving small amounts seems to do nothing, but then larger amounts overshoots. Specifically if I tap +1 for example 10 times quickly it will overshoot. If I tap +1 slowly waiting for the movement to finish each time it will not move enough. This makes the "automated" part useless in NINA because it of course taps slowly...

Could it be the gear ratio and speed? I am using the recommended values (ratio 2, speed 1000) and I have tried changing these without any noticeable difference.

Again this is Azimuth only - Altitude works perfectly as-expected.

thx Stefano,

I don't see the attachment you mention.

Regards,

Duncan