Re: Mach2 tracking below custom horizon

Dale Ghent

To see if SGP has something similar as Voyager's watchdog, you can just start a quick session with SGP and click tracking off at any point in the A-P ASCOM driver or APCC window and observe if tracking magically gets enabled again. You pretty much have your answer at that point.

On Jan 21, 2021, at 10:45, Luca Marinelli <> wrote:

Thanks Ray and Bill.

I was just running APCC, APPM, and SGP to collect exposures. This is why I was puzzled. I’ll keep an eye on it and see if I notice this behavior again.


On Jan 21, 2021, at 10:13 AM, Bill Long via <> wrote:

Voyager has a tracking watchdog. If you were using Voyager it likely started it again.

From: <> on behalf of Ray Gralak <>
Sent: Thursday, January 21, 2021 7:01 AM
To: <>
Subject: Re: [ap-gto] Mach2 tracking below custom horizon

Hi Luca,

APCC indicates the limit was reached, and tracking had been stopped. However, if another application was connected, that application could have re-enabled tracking again.

-Ray Gralak
Author of PEMPro
Author of APCC (Astro-Physics Command Center):;data=04%7C01%7C%7C5c86b426bb84402f024008d8be1d6fc0%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637468380917553041%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=4Vn0%2FRoM8SHoonplDRjyPr3Ynyt6PJHTnfybYTmFo7Y%3D&amp;reserved=0
Author of Astro-Physics V2 ASCOM Driver:;data=04%7C01%7C%7C5c86b426bb84402f024008d8be1d6fc0%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637468380917553041%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=bnDEPcXNNCMTrDHIA6RhXNyn%2BJBLpXGkKHYq5Krr7HY%3D&amp;reserved=0

-----Original Message-----
From: [] On Behalf Of Luca Marinelli
Sent: Thursday, January 21, 2021 5:52 AM
Subject: [ap-gto] Mach2 tracking below custom horizon


I had just finished a APPM run last night and noticed that the Mach2 was still tracking after it had dipped below
the Western horizon. I think I had APPC configured correctly and I was surprised that tracking wasn't stopped. Is
there anything else I should set for tracking to stop when the mount reaches the horizon?



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