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Need some help from the auto-rotating monitor experts...

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Nephasth:


--- Quote from: TopJimmyCooks on March 08, 2012, 06:17:58 pm ---Direct drive takes more like a windshield wiper motor with associated car amperage (3-4 amps or so?) or an Ond-style costly stepper motor.

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Or a smaller monitor. ;)

TopJimmyCooks:


--- Quote from: Le Chuck on March 08, 2012, 06:31:03 pm ---
Edit:  Just found this servo that rocks 800 oz at 6vs for only a measely $300  :lol

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Dang, its on backorder.   :o

The issue with the lazy susan bearing is they're lightly loaded, but they're still being used at an angle they were never intended to do.  There's more resistance to rotation than you would think, especially when starting rotation from stopped.  The reason to use them is they cost $4.   >:D

Had forgotten about the minibeast! 

Le Chuck:

I thought there were some verticle force tested 4" bearings out there in the $10 to $12 range.  I'll see if I can dig one up.  Has anybody vertically stress tested the horizontal bearings?  They are rated in the 200 to 300lb range for horizontal.  At 5  to 10lbs for an LED monitor I'd think it'd be okay but would prefer to see some numbers behind that.  

Edit:  Found it. This bearing isn't actually a lazy susan bearing but a turntable bearing.  They do the same thing but are machined very differently.  I haven't been able to turn up the data sheet for it yet but most all turntable bearings have great verticle ratings as they are just small slewing bearings (think wind turbine or helicopter).  I'll be picking up one of these and putting it through some tests.   

nitz:

Thanks Guys, some interesting discussion. :applaud:

So I'm gonna go with wiring the 12V wire off a molex connector. Hoping to get a chance to play around with it on the weekend. If I get anything done worth sharing I'm gonna start a project thread. :cheers:

EDIT: Could someone elaborate a little more on how I should do this? I was planning on using the same wire I'm gonna use for my CP which is 22 guage I think, or possibly 20. Should I try sticking this inside the molex connector, or is that a bad idea? Could it be dangerous? Should I just cut the connector off and wire that directly to my motor controller? Or would that be dangerous? ??? Pretty clueless about this stuff, and definitely don't want to start a fire or damage anything.

TopJimmyCooks:

5V or 12V 1/2A - no danger of "letting the magic smoke out" or messing anything up really so go for it.  paper clips, tinfoil, hot glue, do what'cha gotta do!

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