[g__day (Matthew)]

So now I have a small challenge to face with SGP - each night the Moonlite focuser seems to associate the starting focus position (and temperature) with wherever and whatever position (at a far lower temperature) it ended on the night before!

So I get the focus maybe moves in 200 steps from start of night position with a temperature in the low 20s to and end of night position with the temperate around 10 celcius - but I would expect to see on the following night the pattern repeat as the same offset - but it looks more like the Moonlight focuser when it disconnected associated it position with the current temperature - rather than the position where it ended the night.

So log viewer shows the same shaped curve - but starting at a lower base point each night!

So its a relative issue. If I turn off the focuser at 10 degrees at position say 5,200 - and then the next night I turn on the focuser at 20 degrees and its still at position 5,200 - then it associates that 5,200 number with the 20 degree temperature - not the ten degree temperature of the night before.

So I can see a few possible process work arounds:

1. never turn the focuser off - and leave it auto temperature compensating in either the driver or the SGP software running the focuser with temperature compensation enabled - probably work a treat but not ideal

2. at the end of the night always go back the the starting position of the first night - say 5,500 for 22 degrees celcius.

3. at the start of the night - before connecting the focuser to SGP - use the hand controller to rack it in to position zero. Then connect SGP and tell SGP to move the focuser to position 5,500.

4. At the start of the night simply tell the driver to reset the focuser position to 5,500.

Wonder if there is any fifth option? Which option would folk advise - I am think 1 would be interesting - but 3 is probably safest!