Jump to content


Photo

Telementor model 2 disassembly

  • Please log in to reply
33 replies to this topic

#1 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 05:52 PM

Here are some pictures of the Telementor II after I took it apart. Very interesting that there is an OTA within the larger tube complete with baffles that actually is moved back and forth by friction by the focusing knob.

Attached Files



#2 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 05:53 PM

Pic 2

Attached Files



#3 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 05:53 PM

pic 3 these are the guides inside the larger tube that keep the smaller tube sliding back and forth smoothly.

Attached Files



#4 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 05:55 PM

Pic 4 this is the focusing mechanism

Attached Files



#5 Masvingo

Masvingo

    Viking 1

  • *****
  • Posts: 882
  • Joined: 10 Jan 2012
  • Loc: Ayrshire, Scotland

Posted 28 March 2013 - 06:02 PM

Interesting! Thanks for posting these, Johann.

What is the friction wheel made of? It is some sort of rubber compound?

James

#6 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 06:07 PM

All metal. The wheel goes into the long slot in the ota and just moves it back and forth when the focuser knob is turned. the wheel has a slight taper to it. Provides about 4" of travel.

#7 Masvingo

Masvingo

    Viking 1

  • *****
  • Posts: 882
  • Joined: 10 Jan 2012
  • Loc: Ayrshire, Scotland

Posted 28 March 2013 - 06:14 PM

Certainly an unusual set up. How light / heavy is the focuser knob to turn? Is there a noticeable difference in feel between the tube being horizontal and vertical?

#8 Dave M

Dave M

    Cosmos

  • *****
  • Moderators
  • Posts: 8190
  • Joined: 03 Aug 2004
  • Loc: Ohio

Posted 28 March 2013 - 06:31 PM

Whats the little blocks on the guides, teflon, metal or something else ?

#9 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 28 March 2013 - 06:40 PM

The little white blocks are Teflon.

#10 terraclarke

terraclarke

    Fly Me to the Moon

  • *****
  • Posts: 5062
  • Joined: 29 May 2012
  • Loc: The Bluegrass State

Posted 28 March 2013 - 07:21 PM

Johann, how's the weight of the T2 compared to the T1? I would imagine the T2 is a good deal heavier. If so, that must be one heavy telescope considering that the T1 is more than twice as heavy as any other 60mm refractor that I own.

#11 gelkin

gelkin

    Apollo

  • *****
  • Posts: 1249
  • Joined: 22 Sep 2010
  • Loc: Western, MD.

Posted 28 March 2013 - 07:53 PM

Pretty cool Johann. Don't have one of those but very interesting post. :bow:

#12 AllanDystrup

AllanDystrup

    Ranger 4

  • *****
  • Posts: 321
  • Joined: 27 Sep 2012
  • Loc: Denmark

Posted 29 March 2013 - 03:17 AM

Thank you for the pics Johann ! -- I've always thought the T2 focusing mechanism was a 'standard' R&P (or possibly a worm gear type, like the Unitron focuser).

Now a friction wheel driven linear actuator..., that's something quite original. Works great though.

Allan

#13 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 29 March 2013 - 06:17 AM

Terra

When I put it back together I will weigh both and let you know the difference.

#14 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 29 March 2013 - 06:24 AM

Have not checked to see if the feel is different versus vertical amd horizontal.

#15 nightpilot

nightpilot

    Vostok 1

  • *****
  • Posts: 174
  • Joined: 16 Feb 2012
  • Loc: Southern Suburbs, Chicago

Posted 29 March 2013 - 11:48 PM

Thanks for the great pics ... I have a T1 but I always wondered what the inside of those looked like and how they worked. Very interesting.

Bob

#16 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 30 March 2013 - 09:50 AM

After I took it apart I realized I did not need to disasemble as much as I did. Will be interesting putting it back together.

#17 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 30 March 2013 - 05:30 PM

No difference in feel between vertical or horizontal focusing. I redid lube with synthetic white grease. Still have not weighed the two tubes.

#18 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 30 March 2013 - 05:34 PM

Not sure if my scale is accurate enough. They both weigh in at 6.8 pounds.

#19 mustgobigger

mustgobigger

    Fly Me to the Moon

  • *****
  • Posts: 5345
  • Joined: 11 Jun 2007
  • Loc: Michigan

Posted 31 March 2013 - 06:39 PM

pretty cool johann...so the two half round shims go in the front
and the other goes opposite focus wheel ?

#20 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 31 March 2013 - 06:54 PM

one half round goes opposite the focuser. the other goes at the end of the tube with the spring loaded shim opposite it. I really did not need to take any of those parts out to remove the inner OTA. I had no clue what I was going to find so I just removed every screw and then the tube came out and all the parts just fell out afterwards. I had to make a special piece of wood with nothches in it so that I could hold the shims in place so I could put the screws back in My hand was too small to fit into the tube.:lol:.

#21 mustgobigger

mustgobigger

    Fly Me to the Moon

  • *****
  • Posts: 5345
  • Joined: 11 Jun 2007
  • Loc: Michigan

Posted 31 March 2013 - 07:02 PM

i always use a paint stick with 2 way tape on it...works great.

#22 terraclarke

terraclarke

    Fly Me to the Moon

  • *****
  • Posts: 5062
  • Joined: 29 May 2012
  • Loc: The Bluegrass State

Posted 31 March 2013 - 08:25 PM

I hope the operation is proceeding smoothly. :smash: Now where does this screw go :question:

#23 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 31 March 2013 - 09:10 PM

All back together

Now to wait for clearskies :cloudy: :cloudy:

#24 Mike E.

Mike E.

    Vanguard

  • -----
  • Posts: 2386
  • Joined: 26 Jan 2010
  • Loc: Moonstone Observatory

Posted 01 April 2013 - 12:15 AM

An interesting and informative thread, thank you for posting.

#25 starman876

starman876

    Fly Me to the Moon

  • *****
  • Posts: 6023
  • Joined: 28 Apr 2008
  • Loc: VA

Posted 01 April 2013 - 08:29 AM

To be honest I think this was easier then taking the helical focuser on the type I telementor apart.






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics