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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Thu Dec 01, 2011 2:03 am Post subject: |
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| CasetheCorvetteman wrote: | No casters. None. Not any. You dont want them... 
Use some adjustable feet instead. |
4 locking casters will do nicely
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CRT.
HD done right!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Dec 01, 2011 6:37 am Post subject: |
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Not if they swivel they wont!!
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Thu Dec 01, 2011 7:22 am Post subject: |
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| CasetheCorvetteman wrote: | | Not if they swivel they wont!! |
My 4000 is on castors. Locked, they don't move.
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Tech support for nothing
CRT.
HD done right!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Dec 01, 2011 10:00 am Post subject: |
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Yeah but thats only an Ampro... This guy is talking about an NEC, and an NEC deserves the best in stability... 
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Thu Dec 01, 2011 6:04 pm Post subject: |
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LOL, you can get locking casters that don't swivel when locked. But you right it will need to be absolutely stable. I'll figure something out = )
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Fri Dec 02, 2011 1:05 am Post subject: |
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Yeah i know, ive installed quite alot of replacement castors on things at work. But the issue is can you adjust each one individually??
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-Pjackso
Joined: 31 Mar 2006
Posts: 791
Location: Oklahoma
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| Posted: Fri Dec 02, 2011 2:33 am Post subject: |
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My recommendation regarding the box construction is to make it somewhat modular, as the total weight will get very heavy very quick.
The CRT is heavy enough already, and the box will be heavy too, and the mirror adds some too.
My recommendations:
1) I mounted the CRT mount onto a flat sheet of plywood/MDF which was separate from the box. The flat sheet (CRT mount) was attached to the box via 3 door hinges at the top. To remove the CRT from the box, lay the box down, pull the hinge pins, and slide the CRT/plywood mount out of the box.
2) I mounted the mirror on a hinge so that it could rotate. Set the CRT raster to midpoint, and use the mirror to aim onto the screen. ...somehow fix the mirror angle. My string works, but is far from pretty.
3) The mirror can be removed from the box also. I have the mirror mounted on a vertical track, which slides down onto the box. When you need to lay the box down (for moving or CRT removal/install), you'll want the mirror removed.
4) Other than that, it's just a box. When in doubt, build it stout, out of materials you know about.
5) As for 'sizing' the mirror, I did it the hard way and measured the tube spacing and calculated the image size at x feet from the lenses. Don't do that. Build the box, install the CRT, turn it on, and place a piece of cardboard where the mirror will go. Trace/measure the area that's lighted up, and get a mirror a little bigger.
6) Casters, I don't recommend them - but it's your box. Consider the total weight, and buy accordingly. 400 lbs total?
I'm more of the idea of spreading out the weight over a larger footprint, rather than 4 point-loads from the casters.
That's about it.
If I think of anything else, I'll post more.
Enjoy!
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Fri Dec 02, 2011 5:54 pm Post subject: |
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Thanks for the tips.
Well the point of the casters was two fold. Mobility obviously and secondly to hold the whole thing up off the ground a few inches so air could flow up through it via fan and convection.
Brian
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Dec 03, 2011 10:38 am Post subject: |
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Yeah i can appreciate why you want them there, and there is ofcourse merit in the idea, but you will not be moving it all the time, unless you really love doing full set ups once a week, and it is my personal opinion that the adjustable legs or feet would be the go so you can get the angle spot on perfect, and also allow for inconsistancies in the flooring or the unit you build.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Dec 03, 2011 2:49 pm Post subject: |
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Build your cart with the casters. Then wheel it to where you want it. Once you have it in place, tip it to one side so 2 wheels are off the ground and slip a couple 2X4's under cart so the wheels just hang when let back down. Then tip the other side and slip a couple 2X4's under that side so those wheels hang. Now your cart is stable but could still be moved later by removing the wood.
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zGman
Joined: 22 May 2006
Posts: 599
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