I am trying to figure out how to use drag script to pause the tracking of my mount when a certain Ha angle has been reached during a sequence. I have a long refractor and large diameter camera/guider combination that in certain position angles and declinations (+20 - +50) will hit my pier prior to the meridian. In other words I would like the sequence to only run until, say 12min prior to the meridian(Ha -.2), then pause (stop tracking) and wait until the target is 10min on the other side of the meridian (Ha +.2) before continuing at which time it would flip since the target is now 12min past the meridian. Is there a way to do this? I have read comments about using the “exit sequence options” within a sequence, stop tracking and then start a new sequence (same target) using Do if on Ha. Any ideas?
Thanks
You cannot pause tracking in a sequence, you can pause mount and check constraint before run a sequence. If your setup hit pier before meridian nothing can be done than avoid meridian position and using HA separated in two sequence (-2 to -0.2) (+0.2 to +2) for example.
Change with your sequence and constraint, really important to put the override of HA exit in configuration of the each dragscript sequence block, sequence file is the same.
testHA.vos (22.4 KB)
All the best
Leonardo
PS I have not tested
Leo,
Thank you for the suggestions. I will test your scenarios.
Best,
Jon
Leo,
I tested this last night. It works…The first sequence needs the Override higher Ha value exit of -.2 for exiting the sequence 12min prior to meridian, then I put a “Stop Track” command in the drag script and a wait command for 24min. The mount stopped and waited 24min before continuing to the next sequence which was the same object now 12min past the meridian or so. The same sequence started without any override. The mount flipped and pointed at the target again. One thing to be careful about is the length of exposure and override value. If a 10min exposure starts 1min prior to the -.2 Ha exit override, the override Ha angle isn’t calculated until the end of the exposure and the mount would possible impact the pier. I would need double this or -.4 (24min) to be on the safe side. Thanks for the idea.
Jon
I think a mechanical solution to avoid hit is the right choice. This will allow you to use the normal meridian flip procedure.
All the best
Leonardo
