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Scratch - Marvel v Capcom: Revolution - Complete with tour video
lcmgadgets:
I finally got around to having a look at this build. Definitely Hall of Fame. That 2nd monitor, for VR pinball, is certainly tempting...must resist...
Congrats, Griff. :applaud:
nanoflower:
--- Quote from: griffindodd on September 26, 2012, 12:57:35 am ---Rotation motor upgrade came in today
As you can see it's considerably beefier than the older motor, it turns at 10rpm and is a 12v motor with a torque of 14kg/cm
As I didn't do many photos of the direct drive build the first time I figured I should take a few during the rebuild.
Here's the back of the monitor showing the old drive collar screwed into the monitor casing at the center of the Lazy Susan baring
I bought a new set of mounting brackets and collars to fit the larger diameter motor and driveshaft, I got these from Pololu although the motor itself was from eBay
New collar in place with a set screw for position
6 M4 screws holding this in place, this aint going anywhere
For the mount screws and D-Shaft collar screw I'm going to use heavy duty thread lock
The motor in place with a large M4 screw driven into the collar thread rather than the tiny little alan key jobbies that come with the collar.
On my monitor support platform I drill my mounting holes for the lazy susan baring and the clearance hole for the motor.
Here's another view of the underside of the monitor platform. You can see the USB Pololu controller that drives the motor, the 12v power supply and the wiring for the two limit switches that stop the rotation.
Bracket mount bent flat to secure the motor to the underside of the monitor platform and the lazy susan screws bolted in nice and tight, all done
All that was left to do was wire the new motor to the screw terminals on the motor control board and we are ready to test.
Nice and stable movement, solid stopping and braking at a nice precise angle in vertical and horizontal planes. The microphone on the phone's video camera makes it sound like the monitor is slamming into the switches but it's really quite subtle, more of a positive 'click'. A big improvement. :applaud:
--- End quote ---
Hi,
First off, this is simply amazing - what a build!
I had actuallly planned to to a fixed horizontal monitor cab until I stumbled across your rotation tests on Youtube.
This really has inspired me and I have decided to make and attempt at copying your rotation rig.
I have a few questions that I'm hoping you'll reply to:
Regarding the Motor Controller:
Could this be powered by the PC's 12V PSU and not a separate one?
Do you remember the make and model of the PSU you went with?
Regarding the Motor Controller:
Looking at Pololu's website it can be ordered with different amp's from anywhere between 7A - 25A's
Could you let me know what you went with?
Regarding the Lazy Susan bearing and the driveshaft motor collar:
How were they fixed - I see the screws and the mentioning of lock thread, but did you drill new holes on the back of the monitor for these?
(I assume that is what you did, but I'm thinking there would be a chance of drilling or screwing into somehing important-ish)
-Thanks in advance, Nanoflower
Maximus:
--- Quote from: nanoflower on December 06, 2013, 09:31:39 am ---Regarding the Motor Controller:
Could this be powered by the PC's 12V PSU and not a separate one?
Do you remember the make and model of the PSU you went with?
Regarding the Motor Controller:
Looking at Pololu's website it can be ordered with different amp's from anywhere between 7A - 25A's
Could you let me know what you went with?
Regarding the Lazy Susan bearing and the driveshaft motor collar:
How were they fixed - I see the screws and the mentioning of lock thread, but did you drill new holes on the back of the monitor for these?
(I assume that is what you did, but I'm thinking there would be a chance of drilling or screwing into somehing important-ish)
--- End quote ---
Hi there,
Yes I think you should be able to drive the motor with the Computer's PSU, just make sure you have a good quality PSU so the Amp draw doesn't start making your computer crash from the load of running the motor. The dedicated power supply I used was from Amazon for about $20, cant remember the exact brand.
I bought this controller - #1373 Pololu Simple Motor Controller 18v7 = $31.95
Yes I drilled into the housing of the monitor, probably best to do this with it removed to be safe, I didn't myself but I'ma bit mad like that sometimes.
nanoflower:
--- Quote from: Maximus on December 06, 2013, 11:49:26 am ---
--- Quote from: nanoflower on December 06, 2013, 09:31:39 am ---Regarding the Motor Controller:
Could this be powered by the PC's 12V PSU and not a separate one?
Do you remember the make and model of the PSU you went with?
Regarding the Motor Controller:
Looking at Pololu's website it can be ordered with different amp's from anywhere between 7A - 25A's
Could you let me know what you went with?
Regarding the Lazy Susan bearing and the driveshaft motor collar:
How were they fixed - I see the screws and the mentioning of lock thread, but did you drill new holes on the back of the monitor for these?
(I assume that is what you did, but I'm thinking there would be a chance of drilling or screwing into somehing important-ish)
--- End quote ---
Hi there,
Yes I think you should be able to drive the motor with the Computer's PSU, just make sure you have a good quality PSU so the Amp draw doesn't start making your computer crash from the load of running the motor. The dedicated power supply I used was from Amazon for about $20, cant remember the exact brand.
I bought this controller - #1373 Pololu Simple Motor Controller 18v7 = $31.95
Yes I drilled into the housing of the monitor, probably best to do this with it removed to be safe, I didn't myself but I'ma bit mad like that sometimes.
--- End quote ---
Hi, thank you for replying.
I'm still a bit confused about the Pololu Controller ???
Have a look at their site there is a drop down that let you choose from: 7 A, 12 A, 15 A, 23 A and 25A
http://www.pololu.com/product/1373
In an earlier post you mention a script that you are tweaking in order to fine tune the rotation, could you provide some more info on this or a link maybe that'll allow me to read up on this (I assume this is a bat file or some other executable of sorts that Hyperlaunch will execute)
Apologies for bombing you - but I'm a completely new to this, and your clean and simple approach to this mechanism has really intrigued me.
I really love the fact that you left out the noisy gears, belt drives and what not.
Thanks, Nano
Maximus:
7A will be fine, it's only a single small motor.
There are examples on the Pololu site of how to run the controller with the supplied software, also command line options so you can write a simple script to control the motor that way. It's been a long time since I did that, but if you're going to build one of these units then you owe it to yourself to get into it and learn it so you understand what is going on.
The key thing when buying a motor is to get one with a native output speed close to the RPM that you want your monitor to turn at (I found between 6RPM and 10RPM to be ideal) don't get something faster and then try and reduce the speed by software as you lose all your torque and that's what you really need to rotate the screen.
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