I've always been fascinated by the complex movements made by 4, 5 or even 6-axis CNC machines. But when I first saw a so-called Stewart platform, which was used in motion simulation, I had the desire to build such a machine myself. However, most of such machines are based on supports which can vary in length, either hydraulically or electrically. In the machine shown here, the positional change is achieved by the fact that the lower base of the supports can move arbitrarily and arbitrarily on a circular path.
The machine presented here is not a machine for practical use, but it should demonstrate the possible working space and the possible complex movements.
Thanks for your interest. Constructive criticism and commissions are always welcome.
This is cool! I teach in a university environment and my students make a Stewart Platform. Are you free to share/sell the 3D file for this? I'd love to give it a try.
I find the design absolutely beautiful and would love to use it myself. I am simply thrilled. Unfortunately, this project has become very quiet. You hear nothing more as it continues, no code how to control the motors or, if it is really great, a customized Marlin version - you can dream :-) But seriously, is it going on or any plan to make the project open source? It would be too bad to let it die.
Thank you for posting all of these videos. It looks like the bearings are screwed firmly in place and don't move along the rails. Are the rails there just to allow fine tuning of the bearing positions in future?
I remember discovering this project when it first had its videos published. I've always wondered how backdrivable the system is, say if you disconnect the motors how free moving the platform would be.
I have an idea for a use for this device. Actually this could really be amazing for what I'm thinking of. Could I send you a private message somehow- I can't see any option to do that.
I say this while nearly finishing my corexy printer design.... This is thatlevel of mathmatics and engineering that is pure black magic to me..... Amazing... is the idea behind this to build a multi axis printer? So to eliminate the need for overhang support? I imagen youll have to develop a whole new type of slicing engine and gcode for fdm prints? Or is this purely for CNC machining?
Very nice! 1.about DC Motor PID controller, only using Position Loop control? Velocity Loop and Current Loop? 2.The GRBL controller send pulse/direction command to DC motor controller ? tks. Mason(skymail0329@gmail.com)
@@circular-base-stewart-plat8428 Fantastic idea all the same. I have the beginnings of an idea for a scaled up, but mechanically simplified version for racing / VR motion sim type applications. I'm very curious, did you pursue this any further?
Hi... fascinating. Any papers, calculations available? I didn't succeed in finding any reference to circular Base Stewart platform online. Is there some difference in max roll/yaw/pitch values than standard Stewart Gough platforms? What are the limits? Thanks for your documentation on RU-vid... watching it repeatedly :-)
Can't proof, I'm the first with this idea. I don't know about others. In the config shown in videos, pitch and roll is limited to about +- 20 deg (40 deg). Yaw is not limited at all. In video 720 deg is shown. It's some kind of natural movement of this config. In video 11 you can see (when looking at the work-plane from below) a second set of top-junctions (ball-bearing balls) are placed much more to the center. Using this junctions (and i did some different calculations) the limits of the rotational-axes (roll and pitch) can be increased to about +- 60 deg (120 deg), but on the other side the possible distances of the translational-axes are decreased.
