Re: #Keypad Park Positions: AP 1100 GTO with encoders #Keypad

Thomas Giannaccini

The mount and pier are on a motorized dolly. The dolly moves about 20-30 ft. I have not taken the setup apart yet but in the future, yes, it will be disassembled and substantially moved. 

I think updating the keypad to Park 5 and using the sequence you suggested will go a long way. 

Thank you,


On Wed, Sep 22, 2021 at 8:42 AM Roland Christen via <> wrote:
Let me ask you a more fundamental question. Do you have a fixed setup where you do not remove the scope from the mount after each session?


-----Original Message-----
From: Thomas Giannaccini <tgiann3@...>
Sent: Tue, Sep 21, 2021 9:32 pm
Subject: Re: [ap-gto] #Keypad Park Positions: AP 1100 GTO with encoders

I received an email from Roland telling me to use Park 3, 2 and 5. So I will try that. 

I think I generally only used “resume from park” on the initial startup. Initially that was Park 1, until George said to use Park 3. So, from that point forward I would resume from Park 3. 

I store the mount in Park 1 so it will fit in the shed. Perhaps I can try Park 4 or 5 to store it. I will first try resuming from Park 4 or 5 but if that doesn't work, I will just start from Park 3 by manually placing it there by hand if necessary  after slewing to Park 3.

In terms of waiting, I never timed it but I never went immediately to a target, I didn’t realize there was a time crunch. I did read the manual but I think it takes a few iterations for it to all sink in. 

What was confusing is that some Park attempts would end with the OTA in very odd positions. So it wasn’t a small margin of error as if the difference was based on movement from tracking; there were many times it wasn’t even in the ballpark. As to if the weights were pointed upwards, I did not notice them pointing up but if it was by a small amount I may not have seen it.

I am interested to try Roland’s suggestion. I think I may have to update my keypad to get Park 5. 

I try not to bog the forum with beginner questions, I only really ask when my attempted solutions don’t seem to work at all.

Thank you for your help,


On Tue, Sep 21, 2021 at 6:56 PM Mike Dodd <mike@...> wrote:
On 9/21/2021 8:37 PM, Thomas Giannaccini wrote:
> When I try to attain Park 4 by slewing to it then
> manually adjusting, it throws the other Park positions off.

After you manually adjust the mount in Park 4, what do you do next? Do
you "Resume From Last Parked?"

> ...when the mount is in Park 1 and slews to Park 4 which way
> is the main objective of the OTA supposed to swing? South or North?

In Park 1, the OTA is horizontal pointing north. In Park 4, the OTA is
horizontal pointing south.

The issue with Park 1, as pointed out by A-P, is that as soon as you
unpark, the mount is tracking, and after only a few seconds, it believes
the counterweight is up, which can be bad. From the keypad manual: "Park
1 is only seconds away from tracking into a counterweight-up status and
slews from Park 1 to western objects may cause the scope to point toward
the ground when beginning the slew."

How long do you wait after unparking from Park 1 before you slew to a
sky target? I usually do that immediately, as quickly as I can pick a
target. I have never had a problem unparking from Park 1 if I'm quick to
slew  to an east target. But, again, Park 4 where I level the mount and
OTA if necessary. (Actually, I will use Park 5 in the future because
that doesn't stretch my imaging cables as much as Park 4.)

--- Mike

--- Mike

CN: HasAnyoneSeenMyNeblua

Roland Christen

CN: HasAnyoneSeenMyNeblua

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