Re: Initial GoTo In APCC Pro Cause Nose or Tail Dive

Ray Gralak


If APCC is initializing your Mach 2 you should make sure the Longitude/Latitude/Time Zone are set correctly when APCC initializes the mount. If one of these properties is incorrect, then the mount will not be able to go to the target accurately.

You should also make sure that you are using the latest version of APCC Pro, v1.8.8.9. he direct link is:

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center):
Author of Astro-Physics V2 ASCOM Driver:

-----Original Message-----
From: [] On Behalf Of John
Sent: Tuesday, December 22, 2020 3:24 PM
Subject: [ap-gto] Initial GoTo In APCC Pro Cause Nose or Tail Dive

Aloha All,

Not sure if I'm doing something wrong or missed a setting somewhere in APCC Pro. Couldn't find anything in the
documentation. Anyway, after I start apcc, everything connects automatically, the mount unparks (from park 3) and
starts tracking. However, after manually enter a star's coordinates and pressing the 'goto button,' the mach2 mount
always does a weird slew (where I have to manually stop it). At this point I could execute a Park 3, and then press the
'find home' button and then the gotos will work.

Seems like the only way to avoid this behavior, is to press the 'find home' button first and then do the goto. Is this the
correct procedure that everyone is using? Just didn't understand why the mount is acting like it's lost, every time it's
powered up and initialized via apcc. I think I also tried loading the mount's current ra/dec and then goto that, but that
didn't work either. I don't mind using the 'find home' button each time, I just don't want to break the mount! :)

The only reason all of this came up (and the only reason I started trying different goto methods),was because the
same thing was happening in Stellarium.

This isn't a problem with the keypad (with auto connect = yes). I can power up, the mount will unpark, then I can go
into the keypad's objects menu and do a goto without any problem. Thanks and sorry if this is a repeat question!


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