Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

C14 forks mount disassembly

  • Please log in to reply
16 replies to this topic

#1 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 12 September 2019 - 11:10 AM

I have an old C14 fork mount I want to remove the byers drive from. I have removed the motor and worm part but for the life of me I cant see a way to remove the casing around the ring worm gear. Anyone ever taken these apart and can give me advice?



#2 scngc7317

scngc7317

    Ranger 4

  • *****
  • Posts: 314
  • Joined: 09 Feb 2009
  • Loc: CA

Posted 12 September 2019 - 11:58 AM

if I remember you work down from the fork side, a bolt or nut in the center I think hmm.gif



#3 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 12 September 2019 - 12:00 PM

I got under the cover there. And I found a small contact plate then a silver piece with three setscrews which I undid. Can't find a way to get that silver piece off.



#4 dmcnally

dmcnally

    Machined Parts

  • *****
  • Vendors
  • Posts: 874
  • Joined: 16 Mar 2012
  • Loc: Lompoc, CA

Posted 12 September 2019 - 12:14 PM

I got under the cover there. And I found a small contact plate then a silver piece with three setscrews which I undid. Can't find a way to get that silver piece off.

Can you post some pictures?

 

Clear Skies,

Dave



#5 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 12 September 2019 - 02:45 PM

Pics

 

 

Attached Thumbnails

  • IMG_20190912_152523.jpg
  • IMG_20190912_152531.jpg


#6 gnabgib

gnabgib

    Viking 1

  • *****
  • Posts: 595
  • Joined: 05 Jun 2005
  • Loc: Fall River MIlls Ca.

Posted 13 September 2019 - 09:53 AM

The "silver" piece is removed my unscrewing it counter-clockwise just like a bolt.  You first loosen the three setscrews then grab the silver piece with your fingers (or pliers) and unscrew it.  This is the retainer that holds the polar axis assembly in the polar axis housing.

I have worked on hundreds of these assemblies.  There are wires attached to the center contact assembly and you need to disconnect them inside underneath the worm wheel.

 

Kevin



#7 MitchAlsup

MitchAlsup

    Soyuz

  • -----
  • Posts: 3843
  • Joined: 31 Aug 2009

Posted 13 September 2019 - 09:55 AM

It would not surprise me if you had to disassemble it from the top.



#8 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 11:10 AM

Thanks guys, managed to get it apart and this is what I am left with, apart from a load of scrap metal. 

 

Is this assembly useful to someone wanting to make a goto dob? If so has it any value and is it a Byers made drive?

 

 

Attached Thumbnails

  • IMG_20190913_120246.jpg

  • dmcnally likes this

#9 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 11:10 AM

Pic2 

Attached Thumbnails

  • IMG_20190913_120237.jpg


#10 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 11:11 AM

Pic3

Attached Thumbnails

  • IMG_20190913_120232.jpg

Edited by telfish, 13 September 2019 - 11:11 AM.


#11 gordtulloch

gordtulloch

    Vostok 1

  • *****
  • Posts: 105
  • Joined: 10 Feb 2005

Posted 13 September 2019 - 11:28 AM

The motors are useless, I guess with the gear and worm you have a nice start on one axis but for a Dob a circular plywood disc with GT2 timing belt glued to it running against a GT2 gear gives you much the same thing... and you can easily make 2 of them!



#12 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 11:41 AM

The motors are useless, I guess with the gear and worm you have a nice start on one axis but for a Dob a circular plywood disc with GT2 timing belt glued to it running against a GT2 gear gives you much the same thing... and you can easily make 2 of them!

Thanks. I am guessing there is another smaller gear set in one of the arms. 



#13 dmcnally

dmcnally

    Machined Parts

  • *****
  • Vendors
  • Posts: 874
  • Joined: 16 Mar 2012
  • Loc: Lompoc, CA

Posted 13 September 2019 - 12:17 PM

Thanks guys, managed to get it apart and this is what I am left with, apart from a load of scrap metal. 

 

Is this assembly useful to someone wanting to make a goto dob? If so has it any value and is it a Byers made drive?

Thank you for the pictures.  I used to have a C14 on a sandcast fork setup.  I never took it apart, but I'm sure someone else will find these pictures helpful.

 

Clear Skies,

Dave



#14 gnabgib

gnabgib

    Viking 1

  • *****
  • Posts: 595
  • Joined: 05 Jun 2005
  • Loc: Fall River MIlls Ca.

Posted 13 September 2019 - 12:19 PM

That is the stock Celestron made drive and not the Byers retrofit.  The ac motor is the drive motor and the dc motor would add very slow motion capability using a switch in the hand control. 

 

Kevin



#15 gregj888

gregj888

    Vanguard

  • -----
  • Posts: 2263
  • Joined: 26 Mar 2006
  • Loc: Oregon

Posted 13 September 2019 - 04:13 PM

I hacked an old Meade 8" adding an OnStep (Arduino stepper) controller. 

 

Same could be done here...



#16 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 04:15 PM

I hacked an old Meade 8" adding an OnStep (Arduino stepper) controller. 

 

Same could be done here...

It could, it's a bit of a beast though.



#17 telfish

telfish

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1977
  • Joined: 17 Nov 2010
  • Loc: Adirondack Mountains NY

Posted 13 September 2019 - 04:17 PM

OK so I have the thing in bits, if anyone wants anything at all from it let me know and you can have the parts free only pay mailing costs.  It's pretty much the complete system.




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics