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Ron Clarke

Power focuser.

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Ron Clarke

Fitting a powered focuser to a Moonlite CF focuser on an ED80 scope.

 

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Ron Clarke

This is the Moonlite in question..

 

IMG_3422.JPG.936e0fbdf875a61e2023a6b495b6d05a.JPGFocuser1.png.2b1763b23d59129f742a44785a4a884e.pngIMG_3429.JPG.aa7c4f6982b678248d46112898be50a1.JPG

 

Top is the photo I sent to Pavle, centre was his reply asking for measurements and the last is the 3mm spindle with the fine focus knob removed.

He was worried about whether the belt would work as there are no notches on the knob?

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Ron Clarke

Moonlite use a stepper motor on the end of the focuser shaft which has a clutch inbuilt. (probably why it costs £280 !!)

 

IMG_3426.JPG.f55cb3d7cb7f889c03da864788b54a6a.JPG

Edited by Ron Clarke
Added image.

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Bottletopburly

A small belt tad smaller than the knob dia turn it inside out , voila teeth 👍😁

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Graham

 

The belt should work fine running on the knurling especially on a focuser of that quality.

Or for belt and braces do as David says.

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Graham

As it is a stepper motor I would run it on the large main focus knob.

No problem with fine adjustment as you should be able to single step the motor -- Normally 200 steps per revolution.

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Bottletopburly

I run mine on fine focus on cheap skywatcher on 200pds 

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Graham
5 minutes ago, Bottletopburly said:

I run mine on fine focus on cheap skywatcher on 200pds 

 

I do as well on my GT81.

I only use it as I use a dc motor and I need the fine control.

Generally it is not a good idea because if the focus tube gets stuck for what ever reason be it jamming, getting frozen or the lock is on it could tear out the internal gearing on the focuser.

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Bottletopburly
27 minutes ago, Graham said:

 

I do as well on my GT81.

I only use it as I use a dc motor and I need the fine control.

Generally it is not a good idea because if the focus tube gets stuck for what ever reason be it jamming, getting frozen or the lock is on it could tear out the internal gearing on the focuser.

I removed lock screw 😁👍 

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Ron Clarke

I have sent all the measurements to Pavle so I'll see what his answer is..

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Graham
2 hours ago, Bottletopburly said:

I removed lock screw 😁👍 

That's good thinking 

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Graham
1 hour ago, Ron Clarke said:

I have sent all the measurements to Pavle so I'll see what his answer is..

Good idea Ron. 

Let us know how you get on. 

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