Main > Project Announcements
Rotating Monitor (LCD) - Pizza Pan vs. Lazy Susan Bearing
javeryh:
I am going to give it a shot this weekend if time allows. I have a 3" diameter lazy susan bearing - I'm hoping the smaller size decreases the amount of side-to-side movement when spinning. I'll be sure to document my findings... :cheers:
csa3d:
--- Quote from: Zobeid on March 14, 2008, 07:35:39 am ---I can't help thinking it would be fine if the monitor were laying flat the way a lazy susan is designed to work, but mine will be tilted up about 50 degrees from the horizontal.
--- End quote ---
I can tell you that my example failed lying perfectly horizontal on the counter edge, being rotated by the secret motor driver and the amped up hobby motor. :dunno I still blame the bearing. Grip was great, and the unit is light.
--- Quote from: Zobeid on March 14, 2008, 07:35:39 am ---I could incorporate another kind of bearing, a higher quality bearing, if I could find something appropriate.
--- End quote ---
So what I plan to cook up next is to visit a skateboarding shop, and purchase 2 individual 22mm swiss manufactured skate bearing, such as the "Bones" brand, or whatever is popular.
Then I'll drill two 7/8" holes using a fostner bit into the wooden mounting base, going only as deep as the bearing, so when inserted, it sits flush with the top of the MDF. Repeat this for the back side. Now, Drill a hole the size of the inside bearing diameter through the wood, and the middle of the 7/8" fostner holes. You will essentially have simulated the inside of a skate wheel at this point, only using wood.
I'll purchase a bolt the size of the inside diameter to use as an axel, and mount it to my pizza pan. Now slip the pizza pan axel through the bearing "axle housing" along with some washers, and tighten with a lock nut.
From my childhood experience skateboarding, the swiss made bearings spin forever, and have very little friction. This technique should clobber any hacked wheel from the home improvement store, as these bearings were made to be abused and to spin fast. A fostner bit runs around 13$, and I'd guess a bearing would run from 2-4$ a piece. Bolt and nuts should be less then 5$. So for under twenty bucks, I'm gonna give this a go next.
What do you guys think?
--- Quote from: Zobeid on March 14, 2008, 07:35:39 am ---The other thing is, it could be possible to put a board with pads of felt or teflon or somesuch underneath the pan (or the wooden backing, in mine) to support and stabilize it, do you think?
--- End quote ---
I'm not so hyped on the idea of anything having to rub the bottom plate just yet. Maybe my tune will change when I've create a perfectly frictionless axel, as outlined above. I don't think, however, that gliders and bolts would be slippery enough to get the job done right. If that method does work, it would certainly be loud. I plan to put the cab in the shared purpose game room.. so if i'm rotating the monitor a bunch it will surely piss of the wife while she's watching tv.
-csa
csa3d:
--- Quote from: javeryh on March 14, 2008, 09:00:04 am ---I am going to give it a shot this weekend if time allows. I have a 3" diameter lazy susan bearing - I'm hoping the smaller size decreases the amount of side-to-side movement when spinning. I'll be sure to document my findings... :cheers:
--- End quote ---
If nothing else.. we're gonna get down to the bottom of this rotating nonsense! Can't wait to see how this works out for ya.
-csa
DaOld Man:
--- Quote from: csa3d on March 14, 2008, 10:05:36 am ---If nothing else.. we're gonna get down to the bottom of this rotating nonsense!
-csa
--- End quote ---
It aint nonsense..... It's science!!
javeryh:
--- Quote from: csa3d on March 14, 2008, 10:05:36 am ---
--- Quote from: javeryh on March 14, 2008, 09:00:04 am ---I am going to give it a shot this weekend if time allows. I have a 3" diameter lazy susan bearing - I'm hoping the smaller size decreases the amount of side-to-side movement when spinning. I'll be sure to document my findings... :cheers:
--- End quote ---
If nothing else.. we're gonna get down to the bottom of this rotating nonsense! Can't wait to see how this works out for ya.
-csa
--- End quote ---
I have a feeling your "skateboard wheel" method is going to end up being the standard. GREAT idea!!! :notworthy:
I'll let you know how it goes for me!