My RosBot build made it to top ten in Misumi contest
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AndThenSome09
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My RosBot build made it to top ten in Misumi contest
Misumi is having a contest for their first150 promo and my RosBot Delta build was chosen as one of the top ten. Go to the Misumi Facebook page to come like and comment on on the RosBot!
Re: My RosBot build made it to top ten in Misumi contest
That thing looks awesome! Rock solid. What was the final price on that thing?
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AndThenSome09
- Printmaster!
- Posts: 249
- Joined: Wed Oct 30, 2013 9:31 pm
- Location: Gardiner, Maine
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Re: My RosBot build made it to top ten in Misumi contest
Well I've spent about 1,000 but there was some stuff I didn't use. I have to figure out the BOM to know for sure. 
I'm hoping to run a kickstarter or indiegogo to offer it as kits if I can find good suppliers.
I'm hoping to run a kickstarter or indiegogo to offer it as kits if I can find good suppliers.Re: My RosBot build made it to top ten in Misumi contest
Nice. I would have figured the linear rails would stiffen the uprights sufficiently, but you're the expert since you tried it.
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AndThenSome09
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- Posts: 249
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Re: My RosBot build made it to top ten in Misumi contest
The rails do add a some rigidity to the frame, however if I grabbed the top and lightly shook it back and forth it would move so much and if I tried to apply a twisting force it was way too easy to twist as well. I know there wont be much twisting force when printing but there will for sure be some force in the x and y directions and the amount the frame would move was just unacceptable for my liking. Plus all the extra Misumi 15x15mm extrusions I got with the first150 promo so they didn't cost me anything! Even if I had paid for them, the 15x15 from Misumi is really cheap, cheap as in price, the quality is outstanding!!
I didn't want to move up in size for the extrusions because then I would need to order special t-nuts, being able to use M3 nuts on the 15x15 was something I didn't want to give up. For one it is much cheaper and two I already had a huge amount of M3 hardware to work with. So I doubled up the 15x15 to make it 15x30 mm which makes it much more rigid and I think it gives my Delta a great look! Even though I had to go back and redesign the top and bottom vertex's I still think it was a wise choice. Once you get up to 780mm high with 15x15 you will notice that it tends to wobble and bend a lot. I wish they made 15x30 extrusions I could buy instead of putting 2 together.
My only oversight on this build was the rods, I used 290mm from eye to eye, but wasn't thinking because that rod length does not allow me to cover the whole Onyx! With these rods my print area is a 220mm diameter circle instead of the 280mm the Onyx has to offer. So my first order of business is going to be getting some 310mm rods so then I will cover the whole Onyx. I know it will eat into my Z height a little but the build height right now is 330mm which is almost exactly 13 inches, so with longer arms I'll probably end up with a foot of Z, which should be enough.
I had so much fun and a lot of frustrating moments while designing all the printed parts in openSCAD. The only thing I didn't design in openSCAD was the hot end mount, I made that in Autodesk Inventor Professional 2015, which is a super easy and feature packed CAD program!
I didn't want to move up in size for the extrusions because then I would need to order special t-nuts, being able to use M3 nuts on the 15x15 was something I didn't want to give up. For one it is much cheaper and two I already had a huge amount of M3 hardware to work with. So I doubled up the 15x15 to make it 15x30 mm which makes it much more rigid and I think it gives my Delta a great look! Even though I had to go back and redesign the top and bottom vertex's I still think it was a wise choice. Once you get up to 780mm high with 15x15 you will notice that it tends to wobble and bend a lot. I wish they made 15x30 extrusions I could buy instead of putting 2 together.
My only oversight on this build was the rods, I used 290mm from eye to eye, but wasn't thinking because that rod length does not allow me to cover the whole Onyx! With these rods my print area is a 220mm diameter circle instead of the 280mm the Onyx has to offer. So my first order of business is going to be getting some 310mm rods so then I will cover the whole Onyx. I know it will eat into my Z height a little but the build height right now is 330mm which is almost exactly 13 inches, so with longer arms I'll probably end up with a foot of Z, which should be enough.
I had so much fun and a lot of frustrating moments while designing all the printed parts in openSCAD. The only thing I didn't design in openSCAD was the hot end mount, I made that in Autodesk Inventor Professional 2015, which is a super easy and feature packed CAD program!