Jump to content


Photo

Celestron/Zhumell CPC-"12"

  • Please log in to reply
21 replies to this topic

#1 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 07 July 2013 - 03:48 PM

Components:
CPC1100 Mount (Arms modified 1" out/6" up)
Zhumell Z12 Dob, all optics original.
Meade Lightbridge 12 Truss System
Still working on a respectable base...

Please be nice... Old OTA was purchased with broken Corrector Plate which now equals Celestron Paper Weight.

This doesn't really fit into any category but thought I'd share. Mount with Primary section is within 1lb of stock CPC1100 with OTA. Truss is 6lbs, Secondary section 4lbs. Didn't even breath hard and balance is within 1lb favoring the primary section. May need to add a bit of weight to the rear, my 31mm Nagler did use some additional clutch.

At first light- a beautiful thing- "Align Success" on first try... Too bad its a bit "swampy" down here in Florida this time of year.

Far more portable then the original Z12...

Attached Files



#2 yonkrz

yonkrz

    Viking 1

  • -----
  • Posts: 944
  • Joined: 16 Nov 2006
  • Loc: SW Minnesota

Posted 07 July 2013 - 04:02 PM

That's pretty ingenious. :grin:

#3 Stacy

Stacy

    Star Partyer

  • *****
  • Posts: 5022
  • Joined: 15 Sep 2002
  • Loc: Seattle, WA

Posted 07 July 2013 - 11:15 PM

I want one!

#4 Zoomster

Zoomster

    Vendor - Clear Sky Adventures

  • *****
  • Vendors
  • Posts: 1095
  • Joined: 30 Jan 2005
  • Loc: Tampa FL

Posted 08 July 2013 - 05:30 AM

I like it, looks cool, too.

#5 JoeR

JoeR

    Apollo

  • *****
  • Posts: 1435
  • Joined: 07 Mar 2010
  • Loc: Columbus, OH

Posted 08 July 2013 - 06:30 AM

That's very cool. I look forward to hearing more on it's performance.

#6 herrointment

herrointment

    Skylab

  • *****
  • Posts: 4362
  • Joined: 12 Mar 2011
  • Loc: North of Hwy. 64

Posted 08 July 2013 - 09:04 AM

That's how you do it!

#7 mak17

mak17

    Viking 1

  • *****
  • Posts: 776
  • Joined: 08 Feb 2011
  • Loc: Central Florida

Posted 08 July 2013 - 04:46 PM

I want one.

#8 Gastrol

Gastrol

    Apollo

  • -----
  • Posts: 1193
  • Joined: 04 Nov 2011
  • Loc: los angeles

Posted 08 July 2013 - 08:21 PM

Nice! I might just do that with mine one of these days.

#9 Never2Busy4You

Never2Busy4You

    Vostok 1

  • *****
  • Posts: 178
  • Joined: 20 Nov 2011
  • Loc: Slower Lower Delaware U.S.A.

Posted 09 July 2013 - 09:18 AM

Love that creativity!
Give us a report when the weather clears!
Enjoy it,
Jeffrey G.

#10 iam1ru12

iam1ru12

    Mariner 2

  • *****
  • Posts: 222
  • Joined: 25 Feb 2006
  • Loc: Raleigh/Durham, NC

Posted 09 July 2013 - 10:41 PM

e...Please be nice... ...


No worries about being nice, I think you have us all impressed. Great job!

-Mike

#11 faltered

faltered

    Viking 1

  • -----
  • Posts: 617
  • Joined: 01 Apr 2005

Posted 11 July 2013 - 10:35 AM

wow. thats really impressive. what a cool project.

#12 edl

edl

    Viking 1

  • -----
  • Posts: 604
  • Joined: 24 Jun 2004

Posted 11 July 2013 - 01:38 PM

Congrats! Very impressive!

I have a modified CPC 11 mount with bracket that I use with OTA's up to 8", including my Lunt solar scopes. These are fantastic mounts IMO that with a little creativity can be very versatile.

Best,
Ed L.

#13 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 11 July 2013 - 03:23 PM

At one point this mount had a C-8 with a Celestron Onyx 80 on it. One day I just had some fun with putting a ST-80 and finder on it... kinda star-war(ish)... I did use it at the WSP in '12 with just the ST-80 as a guide scope and the Onyx 80... (I miss that black scope!) I fabbed a cross bar that bolted to 2 end plates that used the arms existing mounting holes. Balanced great!

Attached Files



#14 Sorny

Sorny

    Viking 1

  • -----
  • Posts: 772
  • Joined: 15 Mar 2012
  • Loc: Southern MN

Posted 13 July 2013 - 08:19 PM

That's awesome. Great way to salvage the mount and make a big dob easy to use.

How much of a PITA is it to balance the scope, and do you find the base sturdy enough?

#15 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 13 July 2013 - 09:49 PM

Sorny, Thank you.

The mount is GREAT! and very versatile with the right applications. I had fun experimenting as you can see in the previous post.
As far as balancing the OTA, I knew that I needed about 4lbs to be removed from the top side. Luckily, the truss system was the answer. (matter of fact, I've seen threads that the truss system would ADD weight! Not so- the truss system is 40% lighter than the tube).
I have now installed a counterweight to offset some of my heavy eyepieces.
As for the stability of the base... the current application is purely temporary! It is NOT that great and I am trying to see how I can a- use the original tripod top plate or b- something altogether different (such as a nice table base).

As some could appreciate- The build is sometimes as rewarding as the views from the end result. :jump:

#16 DarthNebula

DarthNebula

    Explorer 1

  • -----
  • Posts: 73
  • Joined: 27 Oct 2008
  • Loc: Ontario, Canada

Posted 13 July 2013 - 11:00 PM

Wow...very cool indeed.

#17 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 14 July 2013 - 03:11 PM

Here is the SCT Counterweight system bolted onto the Under-side of the primary tube. At 2.5lbs it should give me the flexibility to use the heavier naglers. Weight releases with a simple twist, move, tighten again.

Attached Files



#18 rookie

rookie

    Good Night Nurse

  • *****
  • Posts: 3039
  • Joined: 14 Jan 2006
  • Loc: St. Petersburg, FL

Posted 14 July 2013 - 08:08 PM

Please bring that to the St. Petersburg Astronomy Club when we set up for a group event and show it off!

#19 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 20 July 2013 - 07:50 AM

Please bring that to the St. Petersburg Astronomy Club when we set up for a group event and show it off!


I look forward to it! but the big question is whether it will ever stop raining here!!! :cloudy:

#20 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 28 July 2013 - 06:17 PM

Finally, with an improved base solution, thank you Lowes... and 20.00. (18" wooden circle, 3-5/8 pedestal screws/T-nuts)
Haven't come up with a "wheeled solution" just yet, But I am working on it...

Attached Files



#21 TK6411

TK6411

    Explorer 1

  • -----
  • Posts: 98
  • Joined: 24 Jul 2004
  • Loc: San Antonio, Tx

Posted 28 July 2013 - 08:08 PM

Very creative. I love the idea.

Jim

#22 St Pete Keith

St Pete Keith

    Vostok 1

  • *****
  • Posts: 120
  • Joined: 09 Oct 2010

Posted 13 October 2013 - 04:22 PM

Finally some clear skies down here! Panned around for 3 start alignment and success on first try.
Still need to add about 2 more pounds of weight to the bottom section for the 31mm nagler.
M57 showed to be very impressive, even with the bright quarter moon.
Should be a fun season!






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics