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Equipment Discussions >> Classic Telescopes

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xavier
sage


Reged: 10/31/07

Loc: Belgium
Restoring a Fullerscopes MK-IV mount new
      #5544096 - 11/28/12 03:29 PM Attachment (103 downloads)

Hello
From a local observatory I picked up a heavy Fullerscopes MK-IV mount.

It's a heavy duty mount with a low pier for a 10" newton. the scope wasn't there.

After some googling and contacting users I decided to restore the mount use it again.

Some pics of the actual state can be seen on my sit www.debeerst.com

The controller and hand box are included. The RA motor makes a very strange noise. Recorded it on video
It clearly needs some cleaning. It should perhaps be better to replace the motors?

The worm gears also need some cleaning.

Since there is no Newton and I'm using a C11 a higher pier will be necessary. Anyone a higher Fullerscopes pier? ;-)

All suggestions and advice are mostly welcome,

Xavier

I'll take my time to restore it.

Edited by xavier (11/28/12 03:30 PM)


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desertrefugee
Carpal Tunnel
*****

Reged: 08/06/07

Loc: Arizona
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5544167 - 11/28/12 04:18 PM

Wow! Even though it has legs, that beast belongs in an observatory. I would bet it is pushing what, 75 kilos?

Nice project.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: desertrefugee]
      #5544272 - 11/28/12 05:39 PM

Right, Darell, it isn't a portable setup :-)

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MikeMS
member


Reged: 05/23/11

Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5545468 - 11/29/12 12:39 PM

Hello,

I have had two of these on loan from my local club. They are very stable mounts and thought of well. A useful conversion is the awr control system and on the website are pictures of the modern motors. You did not say if the mount is now yours, but the conversion is expensive, but cheaper than a new mount of this stableness.
http://www.awrtech.co.uk/retrofit.htm
The existing motors are mains driven and probably not the way to go, with mains voltage in a damp environment.
Fullerscope did a 16" F20 cassigrain to go on the mount.
kind regards,
Mike.


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Restoring a Fullerscopes MK-IV mount new [Re: MikeMS]
      #5545484 - 11/29/12 12:49 PM

You could add something like a Sidereal Technology goto kit with Pittman servo motors to that mount for ~$1K or less.

-Tim.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: tim53]
      #5545836 - 11/29/12 04:51 PM Attachment (50 downloads)

Thank your for the advice.
Now it's my mount that I received from the local observatory.
My idea is to restore the mount in several steps.
The goal is to replace an old EQ6 with this mount. But first I must be sure that the mount can be fully operational. Now sits a C11 and (of course) a Polarex 3" on the EQ6. It's ok but over the limit. I've upgraded the EQ6 with other motors, FS2 controller and new gears.
I hope that the C11 and the Polarex will be more relax on the MK-IV.
First is to check if the gears still work. The way the mount looks now there must some rust inside. So the mount must be completely taken apart, cleaned and greased again.
Then control the motion of the mount and the worm.
Therefore the original motors must be repaired. I don't think that will be a big problem.
If the mount work I'll consider to replace the original motors with a solution from AWR in combination with the existing FS2.
I've already contacted Alan Buckman from AWR. He's very helpful. He suggested a pulley drive reduction system.
BTW on his website there is also a solution for Unitron/Polarex mounts (http://www.awrtech.co.uk/motors.htm)

I didn't know Sidereal Technology. It looks like a great.
Need to take a close look at it. any experiences with it?
Xavier


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starman876
Post Laureate
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Reged: 04/28/08

Loc: VA
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5545941 - 11/29/12 06:12 PM

http://www.awrtech.co.uk/motors.htm
Checking the website it is interesting they mention a drive system for a Unitron, but I really do not see how they do it in their drawings. Will have to study them some more. Thanks for the great link.


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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Restoring a Fullerscopes MK-IV mount new [Re: starman876]
      #5545980 - 11/29/12 06:29 PM

Yes, I had a sitech servo kit on my Takahashi EM-500 for about a year or so. When Dave Groski repaired the drive for the Tak (non goto), I put that back in.

They've got a yahoo group with pix of various conversions. I was able to fit the pittman motors in the Tak mount, and just ran the cables through a temporary cover I made out of a sheet of fiberglass I had laying around:



Not shown is the small control box and the hand controller. The cables from the motors send encoder signals to the control box and get power from it.

-Tim


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: tim53]
      #5546602 - 11/30/12 02:30 AM

Wonderful setup you have. Have to reconsider the Sideral technology solution. Thanks, Tim.

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philjay
super member


Reged: 12/02/09

Loc: UK Derby
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5546939 - 11/30/12 10:30 AM

Wow you lucky chap, Ive been looking for one of those for ages.

I have a similar RA drive on one of my mounts and it should be quiet or give a regular low tick but that sounds like a gear skipping to me.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: philjay]
      #5548295 - 12/01/12 05:02 AM

Congratulations with your find of the OO setup. Great find.

Yes, I know that I've been very lucky. The local observatory announced in their newsletter that they were cleaning out the old telescopes they don't use them anymore. No one was interested in the Fullerscopes and the Polarex rain pipe refractor.

They still have a 10" Newton by Fullerscopes. Perhaps I'll pick it up this evening.

The sound of the motor is due to the dirt and the paint job. The mount has been painted after it was completely assembled. All the screws are painted in the same way.
Some paint entered the motor. I think after removing it the motor will be fine.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5590014 - 12/26/12 05:19 PM Attachment (45 downloads)

Hello,

Finally found the time to finish cleaning the Fullerscopes mount.
Was a very nice project. You can see some photos on my website

Ordered two new motors at AWR technology in the UK.

Next step is a pier extension. The pier comes from a Newton. Is much to low for refractors.


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John Carruthers
Skiprat
*****

Reged: 02/02/07

Loc: Kent, UK
Re: Restoring a Fullerscopes MK-IV mount new [Re: philjay]
      #5590732 - 12/27/12 05:27 AM

Dudley seldom made 2 mounts exactly the same. ;-)
The little loose ball bearings in the worms are easily replaced, and the journals can be lightly refaced to help smooth things out.
The original (non export) 240V mains VFO is rugged but a bit long in the tooth now, there are still a few around.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount [Re: John Carruthers]
      #5592203 - 12/28/12 07:08 AM

Thank you, John, for this information.
The mount is completely cleaned and reassembled.
Ready to order the new motors.
Will use a FS2 as controller.
Xavier


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5857922 - 05/13/13 04:56 PM Attachment (29 downloads)

The Fullerscopes IV mount is ready for installation in the observatory.

The mount has been powder coated, new motors, latitude screw and higher pier.

A Polarex 4" is on the mount.
Solid as a rock... Very, very heavy.


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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5857924 - 05/13/13 04:57 PM Attachment (22 downloads)

Detail of the mount and the motors

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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5857927 - 05/13/13 04:58 PM Attachment (22 downloads)

The belt drive

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xavier
sage


Reged: 10/31/07

Loc: Belgium
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5857929 - 05/13/13 04:58 PM Attachment (16 downloads)

The latitude screw

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starman876
Post Laureate
*****

Reged: 04/28/08

Loc: VA
Re: Restoring a Fullerscopes MK-IV mount new [Re: xavier]
      #5857959 - 05/13/13 05:08 PM

Beautiful work.

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Restoring a Fullerscopes MK-IV mount new [Re: starman876]
      #5857976 - 05/13/13 05:13 PM

Wow, what a handsome setup. Scope and mount are perfect together. Just beautiful.

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