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Author Topic: slewing to position  (Read 1859 times)

tidobell

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slewing to position
« on: April 05, 2021, 18:50:56 »
Hello,

I have a problem with goto. For example when I want to go from home position to Capella the declination moves only about five degrees and RA about half an hour. I have checked several times the wiring on the PCB, but there is nothing wrong. The gear rations are right.
I am using the latest version of astroeq and use stellarium also the latest version. What am I doing wrong? Who can help me?
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TCWORLD

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Re: slewing to position
« Reply #1 on: April 06, 2021, 10:52:01 »
Do the motors spin smoothly and continuousl during the movement, or do they sound like they are making a stuttering/grating noise?
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Tom Carpenter (AstroEQ)

tidobell

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Re: slewing to position
« Reply #2 on: April 06, 2021, 11:57:05 »
the motor spin smoothly and continuously. But in stellarium it goes to the selected object, but the mount does not. I am using the 8825.
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TCWORLD

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Re: slewing to position
« Reply #3 on: April 06, 2021, 12:15:17 »
Is the movement out by a constant amount each time? For example if you slew from one object to another, and then back again, does the mount move back to the starting point?
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Tom Carpenter (AstroEQ)

tidobell

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Re: slewing to position
« Reply #4 on: April 06, 2021, 20:27:30 »
yes, it moves back to its starting point. I have not measured the time but it like to be a constant amount of time.
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TCWORLD

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Re: slewing to position
« Reply #5 on: April 06, 2021, 22:39:39 »
Sounds like an issue with one of the mode select lines for the driver.
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Tom Carpenter (AstroEQ)

tidobell

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Re: slewing to position
« Reply #6 on: April 07, 2021, 20:51:55 »
I checked all the wiring and is connected as in your Arduino Mega Schematic on this site.
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tidobell

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Re: slewing to position
« Reply #7 on: April 08, 2021, 20:01:30 »
or is it a software problem?
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TCWORLD

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Re: slewing to position
« Reply #8 on: April 13, 2021, 09:01:13 »
Could you put LEDs or multi-meter on each of the mode select pins, and see what is set for both normal speed (e.g. sidereal tracking) and high speed (Go-To slews).
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Tom Carpenter (AstroEQ)

tidobell

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Re: slewing to position
« Reply #9 on: April 25, 2021, 20:36:52 »
Hello, sorry it took al long time answer you, but  I have measured the signals. For RA  slewing singnals on M0 and M2 and traking signal on M1. For Dec slewing  signals on M0 and M2 and traking on M1. I am using the DR8825 chip and arduino mega 2560.
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