Nice job. I like the acrylic cover!

#celestron #fysetc

KPK Those motors are full on. I'm only using 17HM19-2004S with TMC2209 drivers running at ~50-60% of max current. Good enough for faux-narrowband running 10min subs. See my last image on astrobin. Chr

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I wasn't sure what version I was running and just had a look. I'm still at 3.16 and noticed that 4.24 is the current one ! Haven't changed anything else on mine. Chris

Nice design. Agree about having the freecad etc files. It's really annoying when there are just STL files. So I hope mine are up there!

And yes. I mostly use it with SGPro but have also tried it with nina. I'm sure it will work with ASIair, but others would know more about that Chris

Klaas Onstep certianly improves the CGEM. At its best I was getting around 1arcsec rms tracking error in PHD2. Its now half that with the onstep conversion. At a focal length of 1m (with an 8" F5 newt

maintenance 1. 608 SKF bearings are supposed to be good. I'm in Australia- availability of things is different to elsewhere 2. 6008. No need to replace unless they are damaged. I got two before I real

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Have uploaded all the instructions. Any questions, comment - ask here

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I've added a link in the onstep modification to my CGEM in the showcase. This points to a shared drive I've set up which has (or will have) instructions for the onstep modification, general disassmebl

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Here's a link to a shared drive I've set up which has (or will have) instructions for the onstep modification, general disassmebly & maintenance, adjusting backlash etc https://drive.google.com/drive/

The first thing you can do is check & adjust the backlash. There's virtually no disassembly required for this. You’ll need: metric Allen keys, screwdrivers, and Superlube or grease for motor/worm cogs

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As Khlaid said, if you want to onstep it you have to go the whole hog. Replace motors with steppers and use some sort of onstep controller. Then you can keep the celestron motors/controller for when y

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I don't think there's a good guide on CGEM disassembly and maintenance, probably because theres a commercial products/guide from deepspaceproducts? If you want to splash the cash everyone says its goo

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Egge I'm no expert, but I've pulled apart my CGEM several times. Modifying mine with onstep has greatly improved it - I actually look forward to using it now. Send me a message - can't see you in the

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No need for other sizes. Champagne and White wine would be the same size ?

Yes belting online, see here https://onstep.groups.io/g/main/topic/70089225#19653 And here's the part numbers https://onstep.groups.io/g/main/topic/onstep_and_celesctron_cgem/29748528?p=,,,20,0,0,0::r

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Hemant I used narrower pulleys, so it could fit on the 12mm part of the shaft and still fit inside the housing Chris

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Good idea. I tried to upload but I can't see that they arrived ..

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Brian A few of us have done the CGEM - see the showcase. Francois did it first. It's tracking is way better. Mine used to guide with an error of above 1 arcsec, now I regulalrly get below 0.8. And bes

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Very nice. What gear ratio have you used? I've got 48:15 in mine but thinking of changing to 60:15. It's just a bit of a squeeze to fit in the larger pulley Chris

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