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Rotating monitor - Yet another take
Lutus:
A source for a simple motor is something I too would be interested in.
psychotech:
!!
Thanks for the comments :)
weisshaupt, your thread & wiki documentation inspired me to try this. GREAT STUFF! ..also the fact that I really couldn't tell from the wiki picture how you actually did the motor mounting .. ;) Pretty happy with the mount ..and it can be used "upside down" too, in case I actually find the bicycle chain etc. or decide to do some kind of pulley later on. Not necessary though, this works great.
I'm pretty sure weisshaupt finds the motor & wheel quite familiar ..I ordered them from the Solarbotics.com webshop after seeing the Ghost in the Machine project thread! And about the motor driver & software: well see ..now that I have a "self-contained" working rotating monitor solution I think I should start "designing" an actual cab to put it in :)
danny_galaga, I totally forgot your solution, even though I remember visiting your site when I was building the Tomatocade. Anyway, that's a Great semi-automatic solution :)
And here's my highly technical schematic .. all done around an ON-ON switch..
csa3d, Thanks. Not only does it look simple, it IS ;) Maybe the hardest part was to fine tune the mounting so that there's no "slack".. (and that wasn't really too difficult, so...)
Anyway, for the parts:
Check out weisshaupts LCD mechanism at http://wiki.arcadecontrols.com/wiki/Rotating_Monitor and www.solarbotics.com for the motor and the drive wheel... (I'm using their Gear Motor 3 (GM3) which works really great)
"..can handle the heavy load.." There's no heavy load, just the opposite with this kind of mount. The main bearing works almost too great .. the small wheels at least add some friction :)
The main bearing is from a 165mm diameter wheel I found at a local home improvement store. Just sawed and filed off everything but the main bearing housing.... The wheel's axle was 10mm so I just bought some 10mm threaded rod and made a replacement axle out of that..
The switch I had bought earlier from somewhere local, but those should be quite easy to locate both on- and off-line..?
Not too many parts to add, just MDF, screws, spacers, etc..
DoctorWHO, see above...
Lutus, solarbotics.com GM2 or/and GM3 should both work nicely.
So, ......
javeryh:
This is awesome stuff! I am gaining confidence that when it comes time for me to do this in the cab I'm currently building I'll be able to since so many other will have gone before me. FYI, I'm planning on using a lazy susan to rotate mine - the ball bearings will provide an almost frictionless rotation and most lazy susans can handle a lot of weight. I just have to make sure to line up the switches properly as well as figure out how to power the motor and then get it to talk to MaLa. :cheers:
psychotech:
javeryh: Almost frictionless rotation :o I was aiming for that ..and that's just what I got... So, I had to add the small wheels for at least some friction :dizzy: The LCD just kept on spinning and spinning and ...
Check out weisshaupts software & the Secret motor driver ..
weisshaupt:
--- Quote from: psychotech on February 20, 2008, 09:22:08 am ---also the fact that I really couldn't tell from the wiki picture how you actually did the motor mounting .. ;)
--- End quote ---
I will have to try and get a better schematic put up now that I have gotten good with sketch-up. In the end, your mount is a prettier version of mine, but using almost exactly the same parts. Though I think Javeryh's suggestion to use a lazy susan makes it even easier, and when (if) I build my next cab I will definitely go that route. (You can download a 3d sketchup drawing of that mechanism (well the whole cab actually) in my Ghost in the machine Mark II thread)
The frictionless rotation is tricky. That little motor can't handle a lot of friction, and its brake mode is effective but not immediate. That is why a computer controlled pulse to the motor works better to control the momentum of the monitor.. Have you tried mounting it at an angle yet? Or is your cab going to be a cocktail? The wheels are a good idea. They probably add just enough friction without adding too much..
--- Quote from: psychotech on February 20, 2008, 09:22:08 am ---Pretty happy with the mount ..and it can be used "upside down" too, in case I actually find the bicycle chain etc. or decide to do some kind of pulley later on.
--- End quote ---
Actually, that giant wheel you mounted it to is acting just like a pulley...
The only thing I am contemplating in my redesing is to put a bicycle chain around the outside and use the GM motor with a Bicycle sproket attached - if I can figure out a good way to attach it....
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