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Need some help from the auto-rotating monitor experts...
TopJimmyCooks:
What these guys are saying makes sense - something very common with rod stock is that its deformed where sheared/cut or possibly banged/dropped at the ends. I would make sure you've got a slight bevel at the ends or use a straightedge to see if you have any bend or deformity. you can get a good enough dial caliper at a hardware store to tell you whether one or the other diameter is wrong. Get a $20 metal one rather than a $10 plastic one.
good suggestions all. make sure you know what's up before you do what i did one time: laid the bearing over a hole in my drill press table, tapped in a recalcitrant bar with my BFH and surprise, didn't spin worth a crap. That was a $2 bearing though, I think you've got something worth a little more $ to worry about.
kahlid74:
Thanks for all the suggestions guys! The rod and bearings were from different places so it's entirely possible one is on and one is off. I'll see what I can do. Had the afternoon off so came home early and just finished the base. I'm thinking it will hold a 30Lbs 42" TV just fine but we'll see once we mount it.
darthpaul:
--- Quote from: DNA Dan on March 17, 2012, 09:03:59 pm ---Do you think 6 seconds is too long for a rotation switch? The pololu linear actuators are nice because they have built in potentiometers for feedback if used with the JRK modules. Plus they're ~30% off right now.
--- End quote ---
I don't think this is a negative, I think seeing a monitor rotate is cool and should be played up. DaOld Mans MRotate has the ability to play a sound, when my monitor rotates, I'm playing the the Star Destroyer alarm sound.
darthpaul:
--- Quote from: DNA Dan on March 19, 2012, 06:24:18 pm ---I'm telling you, that robot marketplace has some really good products for the mechanicals. Check out the sprocket section. Lots of custom sizes. (I am in no way affiliated with them, just stoked I found them!)
--- End quote ---
For future reference for anyone, this is where I picked up my gears for my rotating control panels.https://sdp-si.com/eStore/
kahlid74:
So I wound up building a prototype this last week/weekend. My friend came over and we mounted the 42" LED TV to it. It spun like a dream and the weight held fine on two pillow block bearings with 3/4" Keyed shaft. We then tested the pulley's and like everyone said, at about 90% the pulleys started to slip, which is what my friend said they would do. I kind of figured they would but I like trying stuff too.
So he was thinking timing belts, I was thinking gears. The challenge is the weight of the TV pulls the rod just enough where the gears would lose contact, but it's enough to "autotension" a timing belt. So the next challenge is finding pulley's that are built for timing belts and have an 8mm bore and a 3/4" bore.
I took a bunch of pictures so I'll start a new thread in the Project announcement area and post it all there so we stop clogging up Nitz original thread with my antics.
My big challenge now is this cab or my Battletech VR 3.0 pod. Fudge, I just don't have enough time.
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