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motor advice for rotating crt setup

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Ed_McCarron:
http://www.allelectronics.com/cgi-bin/item/DCM-287/400400/POWERFUL_RIGHT-ANGLE_DRIVE_DC_MOTOR_(USED)_.html

24vdc, 46RPM.

Cheap, slow-ish, and pretty strong for its size.  Nice large shaft.  Looks easy to mount.

bluevolume:

--- Quote from: Ed_McCarron on October 10, 2007, 08:09:06 am ---http://www.allelectronics.com/cgi-bin/item/DCM-287/400400/POWERFUL_RIGHT-ANGLE_DRIVE_DC_MOTOR_(USED)_.html

24vdc, 46RPM.

Cheap, slow-ish, and pretty strong for its size.  Nice large shaft.  Looks easy to mount.

--- End quote ---
My question here is still how do you plan on powering that motor?  I don't see how you can get around having to buy another transformer.

Jimbo:
Wow... what a great response! Thanks for your suggestions everyone, what an enlightening thread. :)

My cab's width is 28", and I can't really go wider than that else a) it won't fit through doors and b) it won't fit in the gap I have set aside for it. As already mentioned the bike chain idea is great, simply attached to a sprocket, but in my case it looks like I'd have to give up more space for the chain to fit round the monitor wheel... which, unfortunately, is space I can't afford in my build.

Cornchip's rope idea on the other hand is awesome and looks like it would work great in my situation.  I'm thinking a single motor (as sac01 suggested) mounted in one of the bottom corners would do the trick. I could probably use a bit of string and wind both ends round a drum in different directions (I'm thinking an empty cotton reel would be perfect) so one unwinds as the other winds as the motor turns. Man I love this idea! :)  I'm going to try and find a cheap car window motor, or failing that I'll get hold of a cheap electric drill and wrangle the motor out of that instead.

Thanks again for the ideas and suggestions, there's now light at the end of the tunnel. :)

DaOld Man:
A car window motor is very powerful, thus it draws a LOT of current.
Not sure how much, but I used to have a Firebird that had the flip up headlights.
One of the motors failed, I bought a replacement and played around with it a bit before installing it in the 'bird.
Using a 10 amp battery charger for a power supply, it would peg out the amp meter on the charger.
If you could use a motor that wouldnt draw more than a 200 watt computer power supply you could use an old AT style power supply.
I think it has +12 and -12 volt that could be used to get 24 volts. (Its been awhile so I may be wrong on this.)
What about a windshield wiper motor? Seems like they would be less current demanding.
Looks like it's time to do a google search on motor current amps.
As someone mentioned earlier, you need to account for any high magnetism the motor may discharge, this is bad for crt's.
I really want to design one that turns automatically, based on the game you are playing.
Ive been experimenting with GLaunch. GLaunch can write a pre-command before running the game. I tried triggering a VB6 program that could turn on a printer pin, using it for an output to turn on the motor, but triggering the VB6 program screws up the vram file of the game. So that aint gonna fly.

Ed_McCarron:

--- Quote from: bluevolume on October 10, 2007, 09:20:09 am ---
--- Quote from: Ed_McCarron on October 10, 2007, 08:09:06 am ---http://www.allelectronics.com/cgi-bin/item/DCM-287/400400/POWERFUL_RIGHT-ANGLE_DRIVE_DC_MOTOR_(USED)_.html

24vdc, 46RPM.

Cheap, slow-ish, and pretty strong for its size.  Nice large shaft.  Looks easy to mount.

--- End quote ---
My question here is still how do you plan on powering that motor?  I don't see how you can get around having to buy another transformer.

--- End quote ---

It'll run at 12v, with reduced speed and torque.  It'd probably still be enough to spin the monitor, considering the gear and friction-drive reductions.

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