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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Re:Diy indi rotator?

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Diy indi rotator? was created by martin

Not a focuser. A rotator. Anyone know a arduino based rotator compatible with indi? I do not find on internet. I found 2 that is ascom and not working with my computer, but if an indi one exist base on moonlite protocol or anything else I would like to build one.
Thank you
5 years 1 week ago #36792

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Replied by Eric on topic Re:Diy indi rotator?

If you found 2 ascom rotators, it might be easy to connect them to indiduino first to check. That's obviously simpler if you have the firmware source.

-Eric
5 years 1 week ago #36819

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Replied by martin on topic Re:Diy indi rotator?

This is the ascom ive build, source is at bottom.
www.scopefocus.info/home/rotator

I dont know what is indiduino will check that
The following user(s) said Thank You: Michael
5 years 1 week ago #36823

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Replied by Michael on topic Re:Diy indi rotator?

Great minds think alike.... ;)

I finished my (INDI) autofocuser, was planning to build a rotator when it became obvious that with a narrower FOV, I really could use one... My new 125mm TS refractor is on its way, and it has plenty of back focus, that avoids some of the problems

For my build I decided to treat the rotator like the autofocus, as the issue is very comparable: "Turn this knob/ tube n times" is simple enough. My model, I am plannin on a non-geared NEMA11, will have only a 200 degree range of rotation, which again will reduce cable issues, avoids the belt slipping, and allows me to put the sensor in any position.

I am building my own rotating tube, ball bearings and all, and will simply clamp the timing belt to the tube carrying flattener/filters/camera.... that belt cannot slip!

Do you have any sensor tilt problems? That worries me a bit.

any other hints/ possible pitfalls you might be able to share?

I find it funny that MoonLite ( their thingy costs over 2 K) boasts a pointing accuracy of 0.01 degrees or better....LOL how useless is that! And I love the fact that mine (like yours I guess) costs me less than a fancy steak...


Yours looks great!
Last edit: 5 years 1 week ago by Michael.
5 years 1 week ago #36825

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Replied by martin on topic Re:Diy indi rotator?

Well this is not mine this is the plan i took on internet. I will post photo on mine. No slippage. I crazy glued timing belt around the moonlite....
5 years 1 week ago #36827

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Replied by martin on topic Re:Diy indi rotator?

Arduino rotator imgur.com/a/avYSxME
5 years 1 week ago #36841

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Hi,
do you found a solution for the arduino code and driver that is compatible with INDI?
3 years 11 months ago #52123

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Replied by Chris Rowland on topic Re:Diy indi rotator?

To be fair Moonlite do a simple timing belt based rotator for $440. That's the difficult bit - the rotation assembly - and a stepper motor and brackets.

Most people won't have the engineering skills to make the rotator mechanism.
3 years 11 months ago #52124

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It is not a big problem build a system like this imgur.com/a/avYSxME, the only problem is the indi driver. I found another project that receive some simple serial commads. I am tring to convert it to be used with INDI
3 years 11 months ago #52125

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Replied by Jasem Mutlaq on topic Re:Diy indi rotator?

I was just done yesterday from developing Seletek Rotator driver, which is really a stepper-motor tuned into rotator with belt.

Is this absolute position? relative position? If you can get position, issue GOTO to specific position, and sync position, then it would be trivial to make a rotator driver.
3 years 11 months ago #52131

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Here there is a project built on Arduino sourceforge.net/projects/arduino-myrotator/files/Firmware/

It wait for some serial commands, that execute an action, go to position, reset, get currecnt pos ecc
sourceforge.net/projects/arduino-myrotat...rotocol.txt/download
3 years 11 months ago #52132

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Replied by Chris Rowland on topic Re:Diy indi rotator?

I saw that and it tells me nothing about the most important part, the mechanism that allows the two parts of the OTA assembly to rotate without slop or wobble. A video showoing it working when pointed straight down tells us nothing.
3 years 11 months ago #52138

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