Best place to do a calculation on DEC backlash is to do it when the DEC goes from DEC OUT to DEC IN. The difference between those two would give you the backlash value you would need to take it out, if your mount had that capability.

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Ok, so I finished testing the new driver and it is now applied to the GITHUB for INDI.

So, a couple of questions:

1 - Is your setup using a Raspberry Pi or Ubuntu remotely to control you setup?

2 - Do you have SSH installed and tuned on?

3 - Do you have access to root and it's password?

If you have these you can build / install from GITHUB. It sounds scary, but it's not at all. I can help you get it installed if you need help.

Let me know.

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I have had the best guiding I have ever had using this new version!  Thanks so much!

 

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Well you can download his forked distribution and then compile it on your Raspberry Pi.

Otherwise you would have to wait until it is added to the repository and you can do an APT update command.

Do you have experience with Linux?

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Oh the temps are now properly setup. Motor temp is actually the motor temp and the outside temp should work fine.

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Ok. I have tested all night, and found the following:

The backlash calibration procedure:

It is a great idea, however it is kind of cumbersome to use. If you use large step sizes in KSTARS for focus, it is difficult to detect the position at which backlash has ended. Plus atmospheric changes cause small changes in HFR readings to be reliable as a backlash detection method.

I use the graph created when doing an autofocus on K-Stars to look for the position you would expect to see the reverse function go to position and try and come up with a number that makes it stay within the predicted path.

I would recommend using a textbox to allow the user to fill in the backlash value.

The INDI driver moves the focuser to the target position plus the backlash offset. So the final Absolute position is target position +(-) backlash offset. This is not ideal.

I believe this is a limitation of the Esatto not having a proper backlash function.

To work around this the driver should re-sync the absolute position with the backlash offset, and then the driver should go to the target as expected. This scenario should work well.

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Ok. I have tested all night, and found the following:

The backlash calibration procedure:

It is a great idea, however it is kind of cumbersome to use. If you use large step sizes in KSTARS for focus, it is difficult to detect the position at which backlash has ended. Plus atmospheric changes cause small changes in HFR readings to be reliable as a backlash detection method.

I use the graph created when doing an autofocus on K-Stars to look for the position you would expect to see the reverse function go to position and try and come up with a number that makes it stay within the predicted path.

I would recommend using a textbox to allow the user to fill in the backlash value.

The INDI driver moves the focuser to the target position plus the backlash offset. So the final Absolute position is target position +(-) backlash offset. This is not ideal.

I believe this is a limitation of the Esatto not having a proper backlash function.

To work around this the driver should re-sync the absolute position with the backlash offset, and then the driver should go to the target as expected. This scenario should work well.

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The Temp issue is they are flipped correct? External temp probe is on the internal temp variable?

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Think I will put up some $$ on a bounty to get backlash added to the INDI driver. I don't mind paying for development costs to make the driver work better.

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Sonny Cavazos replied to the topic 'kstars died last night' in the forum. 1 month ago

It looks like INDI Server crashed for some reason. Are you running a remote INDI-SERVER?

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Looks like the Esatto series of focusers need the backlash module part tuned on.  Looks like there is a lot of backlash on the esatto 2" and 3".

Currently on the driver it's there but disabled.

I looked at the indi code, and can't seem to find any reference to backlash on any driver.

-Sonny
 

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Sonny Cavazos replied to the topic 'QHY usb power supply' in the forum. 2 months ago

Also if you are using a QHY filter wheel that has a dedicated connector to the QHY camera, it's power comes from the 12V power source.

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