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Equipment Discussions >> Mounts

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BKBrown
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Reged: 08/23/09

Loc: Northern Virginia, USA
Re: New T-Rex new [Re: Manny Myles]
      #5498359 - 10/31/12 07:55 PM

Quote:

Hi Brian,
In my post asking where this was purchased from was so I could see if the bolt pattern was shown for the mount.
It is shown indirectly and yes I could work something up rather quickly but would need a profile of the face plate shape so the bracket would be as close as possible to the same as the mount.
m2




Kind of wondering if you might be thinking along those lines. Ed recommended 1/2" aluminum, but couldn't this be done with lighter gauge steel to beat flexure and maintain rigidity? It would also be easier to fabricate wouldn't it? I am liking this idea better and better...

Clear Skies,
Brian


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BKBrown
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Reged: 08/23/09

Loc: Northern Virginia, USA
Re: New T-Rex new [Re: EFT]
      #5498394 - 10/31/12 08:18 PM Attachment (22 downloads)

Quote:

An L-shaped bracket could easily be added to the mount but it could add some flexure or instability with heavier loads (due to the bracket, not the mount). To avoid loosing any of the rigidity that is built into the mount, I would use at least the same 1/2" aluminum for the L-bracket as is used in the mount. The one pictured in the Porta II thread would be a capacity downgrade for the mount which would defeat some of its purpose. The tip-in ADM saddle works quite well, but for a smaller refractor I suppose and L-bracket would work fine. I'm not sure if I wouldn't rather attach my TMB130SS to the side saddle, but a L-bracket could be interesting if done right.




I totally understand where you are coming from Ed. You and I have discussed the T-Rex before (still looking for the electric drive motors!) and I plan to pick one up before too long. As far as mounting an OTA, I feel more comfortable with a conventional saddle vs a side saddle arrangement...might just be my quirk. But if Manny designed an aftermarket upgrade, I would certainly like to see it take advantage of the T-Rex load capacity. Personally, I would want to be able to use my C925, TEC 140, and SW100ED/WO66SD Zenithstar combo on board, and I often piggyback the WO on the TEC. I should think this would be less than optimal on the T-Rex in its normal configuration, I think I would find it awkward at any rate. With the L-bracket mod I would also want to use an ADM dual saddle or ADM Losmandy "D" style saddle on board...

Clear Skies,
Brian

Edited by BKBrown (10/31/12 08:20 PM)


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EFT
Vendor - Deep Space Products
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Reged: 05/07/07

Loc: Phoenix, AZ
Re: New T-Rex new [Re: BKBrown]
      #5498716 - 10/31/12 11:43 PM

One nice thing about the aluminum is that I think it could probably be done without the bottom support that was used on the smaller mount if you didn't make it too long. There are also issues between aluminum and steel that could be troublesome.

I would not be very comfortable with something as wide as the C9.25 on the L-bracket. That think that would be pushing it. The TEC 140 might be OK and the smaller refractors would be fine. I have actually set the T-REX up with a C8 closest to the mount and a WO110FLT piggybacked on that (further from the mount) and felt that was OK. Probably more stable would be if you could mount the dovetail for the second scope on the side of the SCT though. I have also stacked a TMB130SS and a LUNT60PT side by side on the T-REX for solar use.


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wrz0170
sage
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Reged: 03/08/12

Loc: Bethlehem, Pa
Re: New T-Rex new [Re: Lane]
      #5498923 - 11/01/12 05:18 AM

Quote:

My new T-Rex has been ordered. Should we start a club William?




Sweet! Definitely post when you get it. Did you get the standard base for the CGEM ?


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BKBrown
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Reged: 08/23/09

Loc: Northern Virginia, USA
Re: New T-Rex new [Re: EFT]
      #5499489 - 11/01/12 03:09 PM

If push came to shove, I could forgo the C925 in favor of the refractors...I use them far more often.

Clear Skies,
Brian


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Manny Myles
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Reged: 11/29/05

Loc: Far South of the flyover city ...
Re: New T-Rex new [Re: EFT]
      #5501452 - 11/02/12 07:41 PM

Thanks for them numbers Ed, seems like one of my Voyager brackets would bolt on, might look funny with the smaller face plate but would have to make a real one to fit like I'd prefer.
m2


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Lane
Post Laureate


Reged: 11/19/07

Loc: Frisco, Texas
Re: New T-Rex new [Re: wrz0170]
      #5503293 - 11/04/12 01:18 AM

Quote:

Quote:

My new T-Rex has been ordered. Should we start a club William?




Sweet! Definitely post when you get it. Did you get the standard base for the CGEM ?




I did indeed. I ordered the standard (CGEM type) tripod too, even though I have a CGEM tripod and the pier extension already. I did it because those tripods are hard to come by and if mine ever breaks it would be nice to have a backup. And the price was reasonable.

Should get it delivered before the middle of the month.

I emailed JMI about a train-n-track for this mount. They responded that it could definitely be done but they needed someone to send them a T-Rex mount. I am not willing to do that with such an expensive mount. I wish the guy building these would get with JMI and work that out. Those motors are super quiet and much nicer to use than manual slow-mo. I have them on my AT Voyager now and they work great.


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