“Focuser not reached the asked position ! Retry [1]” message

Voyager Autofocus & Robofire
1

More than one times I receive a question about what in subject, some info about and workaround:

The Message from autofocus ( is a warning and Voyager will retry for 3 times to fix position and in your case one times is enough) can be two different cause:

  • driver could report moving finished but is not real (you have backlash external to Voyager) or driver issue

  • Voyager is really fast to manage the focuser interaction and is multi thread new generation application this can be a problem for old driver, use the flag Use Slow Polling for ASCOM HUB or Not Multi Thread Driver . This slow down the query to focuser driver : AutoFocus Setup - Voyager Wiki

  • Reported position is discrete and not continue value from driver side, use the setting Focuser Position Check Tolerance [-/+] with a value of +/- 3 or 5**.** This depends on your focuser.

In anycase I suggest to leave Voyager managing the backlash … this will be integrate in the AI focusing routine better than an external compensation. What you cannot have is compensation in two place.

I think Voyager is the only one application that not trust driver and check everytime the real position …

All the best
Leonardo

1 Like
2

Hi Leonardo, If I want Voyager to manage focuser backlash, is this simply enabled in the RoboFire Configuration dialog, Focuser tab or are there other settings that need to be configured?

Thanks,

Peter

3

Hi Peter,

if you use RoboFire like autofocus system in Voyager use the backlash compensation in Voyager:

Just enable and choose the step value. Nothing else.

Remove the compensation in driver !

All the best
Leonardo