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  #21  
Old 12-02-2011, 01:00 PM
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wasyoungonce (Brendan)
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That's excellent Keith. How much did you get taken off?

As you know I've gone the ML CFL with DC motor way. It is in transit was we speak. Also got a 2.5" to TV FL reducer made.

Ron Newman was very helpful.

I'll post back when it arrives.
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  #22  
Old 12-02-2011, 01:24 PM
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telemarker (Keith)
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Merciless t'was I. Took it right down as per the mockup pic. If I need to add anything further I can. No room for the finder ring. The finder arm can be screwed to the tube ring (I use a RA finder) so no big problem.

The moonlite solution was just too expensive for me but it looks an attractive and functional fix. Motorised is the way to go too. Computer focussing? What controller will you use?

Regards
Keith
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  #23  
Old 12-02-2011, 02:00 PM
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wasyoungonce (Brendan)
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Quote:
Originally Posted by telemarker View Post
The moonlite solution was just too expensive for me but it looks an attractive and functional fix. Motorised is the way to go too. Computer focussing? What controller will you use?

Regards
Keith

Hi Keith.. To be honest...the ML is too expensive for me as well. Bread and point for the family meals for the next few weeks.

ML use and supply a
Rigel Systems battery operated, multi speed controller with their DC motors. The motor is supposed to be able to lift 18lbs with the CFL focuser. Which is supposed to be as much as the steppers but the steppers have holding coil current so ....we shall see.

I am eyeing off a an astrogene1000 dual focus controller interface. It uses PWM motor controls to drive DC motors and has full ASCOM and autofocus capabilities. I believe it will work with my ML handset as Gene (of AstroGene) makes the Rigel SYS controllers.




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  #24  
Old 16-02-2011, 11:04 AM
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wasyoungonce (Brendan)
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Keith, I meant to ask .."are you a member of the ED127 yahoo forum"?

If you are do you mind posting up pics or a pdf description of the mod you did to the focuser.

I suspect many others would be interested in this and it may benefit them.
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  #25  
Old 17-02-2011, 10:00 AM
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telemarker (Keith)
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Yes, I'm a member of that forum. I'll see if I can get some pics this weekend and put something together.

Regards
Keith
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  #26  
Old 17-02-2011, 11:34 AM
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wasyoungonce (Brendan)
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Thanks Keith.

That would be great and very helpful to others.

Brendan
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  #27  
Old 21-02-2011, 01:44 PM
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telemarker (Keith)
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Draft note for 127ED mod

Brendan,
Could you peruse/comment on this.

Regards
Keith
Attached Files
File Type: pdf Shortening the flange on the North group 127ED.pdf (217.4 KB, 37 views)
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  #28  
Old 21-02-2011, 02:28 PM
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wasyoungonce (Brendan)
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That's just the ticket Keith. Many others will be able to see what you have done when facing the in-focus issue.

My ML is still...."in transit"...sigh!

I must say...."Bozzie" looks more loyal than my "Mozzie".... who won't stay outside with me on cold nights!
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  #29  
Old 24-02-2011, 12:21 PM
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wasyoungonce (Brendan)
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ML CFL has arrived.

Works a treat. No problems lifting camera and reducer. Had a small Anodising imperfection on the side of the focuser body..meh!..could have happened during shipping and too small to worry about.

You can focus with the left had knob but this moves all the DC motor gear train and is less than practical to use. It's really not designed for this in any case.

The DC controller works very nicely. It appears to be able to resolve into small enough steps for AP, but only just. By this I mean you can probably be 5 or so steps either side of focus and find it's acceptable but the steppers could resolve to around 100+ steps either side..more accurate. The DC controller has a RJ11 jack for hook-up to the Rigel sys GCUSBnFocus interface, so you can temp control autofocus via computer.

I'll be getting this interface..only around $50USD.

I got a 2.5" custom adaptor made for my TV reducer so to fit it straight into the Drawtube. I'm glad I did, makes it very easy to use. I'm having trouble getting the spacing right for the TV 0.8x reducer/flattener..but that's another story.

Everything is nicely made although I'm confused about the finder scope dovetails. I suspect they are vixen size but they have quite small footprints. I have ordered a stellervue finder scope mount for my old finder but I suspect the finder foot may only half fit into the ML finder dovetails?

So..over all it's great but as with every new equipment..you need to rush out to buy accessories to make it all work!

Anyone else with a ML have issues with the finder dovetails?

edit:
Forgot to mention. I needed a 2" extension tube to reach prime focus with my DSLR (this is normal). I reached in-focus with my TV .8x reducer/flattener no problems with plenty of in-focus travel still left. So they have spaced this focuser and flange correctly!
Attached Thumbnails
Click for full-size image (IMG_7519 copy very small.jpg)
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Click for full-size image (IMG_7529 very small.jpg)
76.3 KB21 views
Click for full-size image (IMG_7517-very-small.jpg)
60.3 KB21 views
Click for full-size image (IMG_7573 very small .jpg)
28.4 KB18 views

Last edited by wasyoungonce; 24-02-2011 at 12:53 PM.
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