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Delta Robot - Yazzo PolyBot Derivative

by Renosis Apr 3, 2011
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nice! could you post a dwg for the foamcore middleplate?

What size did you print the female clevis part? Mine came out too small for some reason...

Well.... I could have sworn someone else asked me about this and I thought I fixed it, but I guess I must be mistaken. By now though, I have forgotten which file is the right one on my computer. So, just use these by WilliamAAdams:


They were originally his design anyway, and I believe he has even improved upon them, because these are new as of 3 months ago:

The ones I was using were designed by him 6 months ago for version 1 polybot. So he must ha
ve found something to improve about them, lucky you!

PolyBot Male Clevis
PolyBot Female Clevis

why not delete the ones you have on this page so it doesn't confuse people when they print them out and waste plastic like I did?

Ya, that is a good idea. Done!

Sorry for the mistake.

So, for future Delta Robot makers, If you are going to assemble one of these robots, be sure to follow the new links added in the description for the Clevis Elbow parts (both male and female).

This is very, very cool. Do you have it running RepG yet?

Well, I wish. Turns out it is not even close to accurate enough for the 3d printing. It isn't even really accurate enough for a bottom of the line pick and place machine. But... keep watching, I plan on making a super accurate one, once I get some time.

This is great. It would be cool to turn it upside down, mount a stationary extruder above it, and put a print platform on it. Might need to work on making it a bit more rigid, and mabye a bit smoother, but that would be a cool 3d printer that would be easier and cheaper to make. There is practically no force generated on the print platform, so it could work out.

I like that idea. Definitely doable. I am going to try it!

Of course most of the parts here won't work. Looks like it's time for a total redesign. To increase accuracy, I will need to have the knees on some kind of rail or have the servo arms canter levered at least. Also, I would need to shorten the servo arms, it moves too far per each degree of movemen
t. I may need to upgrade the servos, too.

You can put bushings into the 'elbows' and use smooth steel pins inside those bushings for some very smooth action. Make those pins short enough, and the lower arms won't move side to side. Same thing on the effector.

This looks cool!

(Now if I just had the time to learn OpenSCAD to make a metric version and print me one of this.)

The design is fairly forgiving. You can just use M8 rods instead of 5/16" and it would probably work out just fine. That's primarily for the vertices.

Yup, the design is metric compatible. It was actually designed for 8mm rods. All my software is setup for metric. It's my hardware store that is incompatible with the rest of the world. I guess I should add that to the description.

Well done! It looks like the basic design is easily improved upon. That should spark some quick innovations.

Perhaps bamboo could be used as a structural material here?

You can do bamboo with this design. Just do a slip fit on the vertices and use glue as your fastener.

My current experiments use slip fit.

I think bamboo might work. The whole idea behind this delta robot is for people to build their own and experiment. The structure is all there and if you change out certain parts, you could probably build it with any material you could dream of using. With some inventive minds you could probably do some pretty neat stuff with this bot.