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APPM Questions : APPM / GTO1100AE Blocking Issue
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philippe oros
Hi Ray & George
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Since a few days I have an blocking issue wit my AP1100 AE : when I try to slew I get the error shown in the file attached below and the slew is not performed !!(its a pity because the sky is good) I have checked and tested with another power supply same situation, I have installed all the last versions of APPM Pro and drivers, idem. Please can you tell me wha to do or try ? Thanks a lot Philippe  
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Roland Christen
What is your power supply?
What is your outside temperature?
You may have too low voltage from your supply, especially now that it is getting cold outside. For cold temperatures it is recommended to use 16 to 18 volts to run the mount.
You might get by with 12 volts if you turn the maximum slew speed to 600x.
Rolando
-----Original Message-----
From: philippe oros <oros.philippe@...> To: main@ap-gto.groups.io Cc: George <George@...>; groups3@... Sent: Wed, Nov 11, 2020 11:30 am Subject: Re: [ap-gto] APPM Questions : APPM / GTO1100AE Blocking Issue Hi Ray & George
Since a few days I have an blocking issue wit my AP1100 AE : when I try to slew I get the error shown in the file attached below and the slew is not performed !!(its a pity because the sky is good)
I have checked and tested with another power supply same situation, I have installed all the last versions of APPM Pro and drivers, idem.
Please can you tell me wha to do or try ?
Thanks a lot
Philippe
 
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Roland Christen
12 volts will work if there is indeed 12 volts at the CP connection. If your power cord is long, it is quite possible that the voltage will drop below 11.5 volts at the CP terminals when the mount is slewing. For every amp that is drawn by the mount the voltage will drop between 1/2 to 1 volt in a 5 foot power cord. You may be losing more than 1 volt now that the weather is colder and the motors draw more current during a slew. Once the voltage at the CP drops below 11.5 volts, then there will be an undervoltage error.
In my observatory I use 13.8 to 16 volts in the cold weather. Check also the connector at your power supply. It may be marginal and can cause voltage loss also.
Rolando
-----Original Message-----
From: philippe oros <oros.philippe@...> To: chris1011@... Cc: George <George@...>; groups3@... Sent: Wed, Nov 11, 2020 4:34 pm Subject: Re: [ap-gto] APPM Questions : APPM / GTO1100AE Blocking Issue Rolando
no the LED is Red By the way I’ve checked carefully the voltage levels and the ps that was sold to me by the distributor is in fact 48W (12v 3A) and reading the recommendations in AP documents they suggest using a 5A ps, so I’ve changed it for a 5A and the slew works now. i will test longer tomorrow. What I don’t understand is why this happen because I’ve been using the current ps for almost two years now and with much lower temperatures, the only thing I noticed is today the humidity level is very high and I don’t know if it can play a role … Thanks for your help anyway > Le 11 nov. 2020 à 19:36, chris1011@... a écrit : > > |
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