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Old 08-06-2022, 05:58 PM
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Spaceman_Brown (Matt)
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Sky-watcher Evolux 62ED and ZWO EAF Help

I have purchased a Sky Watcher Evolux 62ED and am trying to set it up for some automated wide field imaging.

While fitting a ZWO EAF to the bottom of the scope, I've noticed that none of the little silver flexible couplings that come standard with the EAF are compatible with the brass focusing pinion on the scope. The pinion is a larger diameter than previous Sky-Watcher ED scopes and doesnt fit the EAF couplings. I've attached a couple of photos of what I'm on about. The focusing pinion on the 62ED is approx 6mm in diameter and the largest of the couplings is approx 4.5mm.

Does anyone know of a possible workaround? Any information would be appreciated.
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Old 08-06-2022, 06:32 PM
Martin_S
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Matthew, would these links help?

https://www.aliexpress.com/wholesale...tail.1000002.0

https://www.aliexpress.com/item/1000...21ef1802z9MjLa

https://www.aliexpress.com/item/3282...10.62%21%21%21


Martin
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Old 08-06-2022, 06:41 PM
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Spaceman_Brown (Matt)
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Yep! Awesome, thanks so much!
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Old 08-06-2022, 06:48 PM
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No worries.
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Old 10-06-2022, 06:27 PM
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Just drill it out to the correct size if you have a.drill
I had to machine the outside diameter of one by putting a 4mm bolt through the middle to compress the coupling. I have also drilled one out to 6mm
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Old 10-06-2022, 07:44 PM
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I was thinking of that but i was afraid of making a mess of the couplings.

How did you machine the outside diameter down? As in, what technique did you use?
It looks as though I'll have to shave the outside diameter down as well as the internal diameter for the couplings to fit my scope and I only have limited tools.
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Old 11-06-2022, 10:24 AM
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Tinderboxsky (Steve)
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I have drilled one of these out for a friend faced with the same dilemma. There is plenty of metal in the solid section of the coupling to do this without affecting it’s integrity.
It is quite straightforward with the right tools. I did the hole widening with my lathe. But it would also be quite straightforward using a drill press.
I would not try to reduce the diameter of the focuser pinion. It is doable on a lathe, but it will detract from the integrity of your scope.
Do you know someone locally with the right tools? A local machinist could widen the hole in a “jiffy” - perhaps a six pack as a thank you.
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