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Re: Programmed focusing question
Ray Gralak <groups@...>
Hi Keith,toggle quoted messageShow quoted text
I doubt you will get reliable results by just sending a set of commands like that every half hour. But if you really
want to move the focuser (sort of ) precisely you will need to have accurate timing between the focus start and stop
commands. In your example below you could move the focuser 10 milliseconds via the following commands (not sure if the
Sleep function is there for your scripting environment. If not, search for an alternative function):
If you want quality focusing you will need closed-loop feedback... that is visually you will have to determine when a
star is best focused or use an application to do so (like FocusMax).
In any case I'll take a look at the driver code to see if I can determine why focus is jumping like you say.
-----Original Message-----pretty much
able to do my imaging from the comfort of my office. The only issue is focusing. I can focus manually using thebuttons in PulseGuide
as I have a motorized JMI focuser (this works better for me than the ASCOM V2 driver, as I can't seem to keep thelatter from making
large jumps when I hit the buttons, even on the slow setting). However, after a night of waking myself up every hourto refocus, I'm
looking for a more automated solution. I know about FocusMax, but I don't have MaximDL or CCDSoft and I likeNebulosity for camera
control.control box. Looking
at the command protocol, I should be able to send :F-# (or perhaps more completely, :FS# :F-# :FQ#) to the box atautomated intervals
to adjust the focus as the night cools. For automation, I'm thinking low tech, just setting up a scheduled repeatingtask in Windows that
sends an adjustment every half hour or so throughout the imaging session. What I don't know is how to do this. BeforeI got my Mach1,
I used to send a timed Park to my LXD75 mount using the following vbs script via a scheduled task:command every half
hour? If so, how would I do this?