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Equipment Discussions >> Reflectors

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DonY
member


Reged: 08/29/13

Loc: Leesburg, VA
Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6201663 - 11/18/13 12:51 PM

I love it and highly recommend it. Much cheaper than digital setting circles and combined with a digital level is just as accurate.

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bevelhead
journeyman


Reged: 12/01/13

Re: Mega-mod thread for Zhumell dobs new [Re: DonY]
      #6235479 - 12/05/13 01:58 PM

The extra holes in the primary mount on the AD12 are 8x1.25mm. I added bolts and pressed on some bottle caps filled with sticky tack putty for feet to protect the primary adjusters. I also used tack putty to mount my GLP. Butting it up against the focuser mount lines it up well enough to get whatever it's pointing at in the finderscope.



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Elroy
member


Reged: 11/22/13

Re: Mega-mod thread for Zhumell dobs new [Re: Tim L]
      #6242444 - 12/09/13 11:28 AM

Looks like I'm next!
This thread is great. Thanks to all you kind and knowledgeable people for sharing your ideas and work for the rest of us to learn from.



Edited by Elroy (12/09/13 01:22 PM)


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petrus45
sage
*****

Reged: 01/31/11

Loc: SW Ohio / N Ky.
Re: Mega-mod thread for Zhumell dob-focuser upgrd new [Re: Tim L]
      #6253021 - 12/14/13 04:59 PM

Anyone found a really ideal focuser upgrade for the Z10?
I have an older Z10, originally with single speed crayford, replaced with dual speed, but I find it's still a bit wobbly feeling with heavier EPs. I've tried John Isaac's suggested method of holding the EP flange flush against the focuser insert while tightening the screw, but I still can wobble the EP just a bit in the collar (single screw compression ring). Also, I noticed the barlowed laser will move off center pretty easily if I "tug" on the focuser, imitating the effect of a heavier EP. Perhaps I need to tighten the screws holding the focuser to the OTA, or is this an issue of inherent focuser stability? Any suggestions?


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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Nyctophobia, Maryland, USA
Re: Mega-mod thread for Zhumell dob-focuser upgrd new [Re: petrus45]
      #6253032 - 12/14/13 05:08 PM

I've upgraded the focuser in my C10NGT - a Celestron f/4.8 Dob OTA similar to the Z10 - with a low-profile, two-speed Crayford Moonlite focuser. Solid as a rock. And now nearly all my eyepieces come to focus when I use my 1.25" or 2" filter wheels.* Well worth the money.

*The TV Nag T5 31, Leica ASPH and ES 100 20 are the only ones among my eyepieces that do not have enough in-focus in the 2" filter wheel. The ES 82 30 does come to focus. I've sold the ES 100 20.

Mike


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petrus45
sage
*****

Reged: 01/31/11

Loc: SW Ohio / N Ky.
Re: Mega-mod thread for Zhumell dob-focuser upgrd new [Re: petrus45]
      #6253036 - 12/14/13 05:10 PM

Also, while I'm at it, anyone ever use an equatorial platform with a Z10? Necessary? Worth it? Not that I can afford any of this....

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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dob-focuser upgrd new [Re: petrus45]
      #6253648 - 12/14/13 11:49 PM Attachment (55 downloads)

My customized Z12 lives on a dedicated Atomic EQ platform. As I did my re-build, I planned for the platform's height. I shortened the rockerboards to accommodate this added height. I found my platform for sale used online and got it for only $300.

How is your Z10's EP height now? Most platforms will add at least 3-4". With a 10" this could be ideal- depending on your height.

You will never want to go back if you try observing on a platform. It is SO nice being able to switch EPs and have the target not get lost, even at very high magnifications. Tracking allowed me to find the central star in M-57. You have to concentrate on the proper spot and wait for fleeting moments of perfect seeing to pick it up.


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Sarkikos
Postmaster
*****

Reged: 12/18/07

Loc: Nyctophobia, Maryland, USA
Re: Mega-mod thread for Zhumell dob-focuser upgrd new [Re: kfiscus]
      #6254049 - 12/15/13 09:24 AM

I'm waiting for an upgrade to a 14" Dob before I get tracking. It will probably be built into the mount.

My 10" Dob is exactly at the right height now for comfortable sitting at all positions. I don't want it any taller. Besides, I have to set up in a public area near my house. I don't need another piece of equipment to schlep out of the house, down the porch, and around the side of my building.

Mike


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DannyL
member


Reged: 07/04/13

Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6256335 - 12/16/13 01:54 PM

Absolutely the nicest base I have ever seen. DannyL.

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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: DannyL]
      #6256886 - 12/16/13 07:32 PM

Thank you very much.

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Elroy
member


Reged: 11/22/13

Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6266088 - 12/21/13 09:51 PM

My new Z12 has now taken apart. The primary cell and mirror were a lot heavier than I could have imagined but managed it ok.
Different types of flocking out there, the fabric with the adhesive, flocking board and flocking tube. What is the favorite here on CN ? Any suggestions or comments? Any one wished they had tried something different?
Heck yeah I'm a newbee but I am really going to enjoy this. No, my name isn't Elroy Jetson, my name is Brian.

cheers!


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petrus45
sage
*****

Reged: 01/31/11

Loc: SW Ohio / N Ky.
Re: Mega-mod thread for Zhumell dobs new [Re: Elroy]
      #6266216 - 12/22/13 12:10 AM

Quote:

My new Z12 has now taken apart. The primary cell and mirror were a lot heavier than I could have imagined but managed it ok.
Different types of flocking out there, the fabric with the adhesive, flocking board and flocking tube. What is the favorite here on CN ? Any suggestions or comments? Any one wished they had tried something different?
Heck yeah I'm a newbee but I am really going to enjoy this. No, my name isn't Elroy Jetson, my name is Brian.

cheers!




Hey Brian, and welcome. After reading up extensively on CN, I did what a couple other folks on this thread did flocked the OTA with black velvet from Joann Fabric, using 3M Super 77 spray adhesive. I've had it for about a year that way now, with no problems. A couple of tips though:
- You have to hit both the back of the fabric and the inside of the tube with the glue for it to really adhere.
- Be careful because once you touch the surfaces together they arent coming apart. I rolled the fabric on a broomstick, and inserted it into the OTA, then gradually unrolled it a bit at a time, pressing it into place.
- Keep all optics, focusers, screws, etc., far, far away when you are spraying adhesive.

Here's a link to the thread where I asked about this before: Flocking with Velvet Fabric


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: petrus45]
      #6266444 - 12/22/13 05:56 AM

I used the Protostar flocking board. Its plastic backing is springy, wanting to keep it against the tube. I used small pieces of the 3M premium foam adhesive tape (has red release plastic) as insurance. I also used the OTA's bolts to hold the flocking in place. You'll want new Exacto knife blades and the brightest work lights available as you go. It gets harder and harder to see what you're doing as the flocking is installed. I used fast-drying flat black paint on all the bolts heads after everything was in.

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Elroy
member


Reged: 11/22/13

Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6266631 - 12/22/13 10:32 AM

I may have been reading too much! lol
thanks for the replies, I know I'm in the right place.

I'll run by Joann's fabrics today or tomorrow while doing some last minute Christmas shopping and check it out.


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Elroy
member


Reged: 11/22/13

Re: Mega-mod thread for Zhumell dobs new [Re: Elroy]
      #6266635 - 12/22/13 10:36 AM

Thanks kfiscus! You've done an awesome job with your scope, you and skizoid!

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poodle
sage
*****

Reged: 01/21/05

Loc: Breckenridge, Texas
Re: Mega-mod thread for Zhumell dobs new [Re: Elroy]
      #6269274 - 12/23/13 07:30 PM

I have a question, I noticed on the mirror cell on my Z12 that there are six spokes on the cell. On the spokes that have the pads that support the mirror it has the lock screws. On the other spokes it has the adjustment screws. Is that not backward? I would figure that the spokes that support the mirror would have the adjustment screws. I noticed on the pic. that bevelhead posted that his were the same way.

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cpr1
professor emeritus
*****

Reged: 03/24/12

Loc: Louisiana
Re: Mega-mod thread for Zhumell dobs new [Re: poodle]
      #6269688 - 12/23/13 11:23 PM

Hi Steve. The cell was designed that way. The collimation screws thread into the circular frame. The spokes move with the frame, The triangle pads float on the frame. The triangles have sticky pads with usually one pad on each triangle stuck to the back of the mirror. The other little pads have the plastic film still on so they are not stuck.

This is how they decided to keep the triangles in the appropriate positions.


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DsoS4Life
sage


Reged: 12/03/13

Re: Mega-mod thread for Zhumell dobs new [Re: cpr1]
      #6297510 - 01/07/14 07:34 AM

bump bump...
just plaining my carrying handle local. not sure if to put one on side in front of bearing. then one on other side. or one on top and carry with say left hand in top handle and right hand in the cell ..
also thought about . gettin a case to fit cell in . and thumb screws. remove cell . move tube. replace cell. so on so on..
it gives more chance i guess to damage the cell. but if i make a cover to fit over it around the sides to support might be good ..
any ideas on this would be great...

also thought about the truss mod.. not to sure.. has anyone else done this?? if so how do you like it? pros cons ???
thread should be a sticky..
these mods work with many Newt/Dobs


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kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Mega-mod thread for Zhumell dobs new [Re: DsoS4Life]
      #6298072 - 01/07/14 01:24 PM

I started out with two Strap-A-Handles, one on each side of the bearings. I didn't have the control I wanted for maneuvering the OTA through doorways and into/out of van. I now have one strap behind the bearings for my right hand and use my left inside the open front end.

I've considered putting the 2nd Strap-A-Handle back on in front of the bearings and then making a coupling to join the two straps for safety and to make a handle that is 90 degrees rotated (parallel to OTA). This might end up like the pricey ScopeTote ($80 for 12").


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DsoS4Life
sage


Reged: 12/03/13

Re: Mega-mod thread for Zhumell dobs new [Re: kfiscus]
      #6298146 - 01/07/14 01:47 PM

not sure if it will do this to you if you add the 2nd strap..
i made a nylon rope harnes. to get idea of a 2inch width straping. like a model to work from..
i found the min i picked up from the handles all weight went right to the top handle. to me witch is wried as the weight i would think falls to the bottom handle.. i did have the rope goin around the cell side or bottom if you will.. so it wouldnt slide out of the harnes. so 2 loops around ota and 2 across the bottom.
mind you same basic idea as you have. but again i used nylon rope with zip ties to make the 1st idea ..
for me didnt like the idea of transfer of weight to top handle so i tossed the idea to the side. and seen the handle s. ill give your idea a go and see how it feels.
i do have to bring it up and down a flight of stairs. but not offten. once it warms up. it will be outside.. and into truck isnt bad once and while ..


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