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A project log for DIY Harmonic Drive Equatorial Mount

A home built equatorial mount for my telescope built mostly recycled components I have had lying around.

Jerry BiehlerJerry Biehler 07/20/2014 at 05:520 Comments

One thing about a lot of japanese stuff is they really like to use more of the odd-ball connector. In the case of this it uses 20 pin MDR connects for all of the IO for the drive. So I ordered some of those off ebay and ordered some mating connectors for the servo motors from mouser. Or so I thought. In the manual it shows the part number for Molex MiniFit Jr connectors but they are really AMP Mate-n-lok connectors. They look the same but they keying is different and they use different pins. So I ordered the right ones and was able to get the servo cables made up.

For the box to hold all the drive electronics and controller I used an old box from a communications package for a ScanEagle drone. Nice aluminum case with connectors already on the side. I got the wiring finished tonight, now I need tie it all together and see if it works.

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