Motor end for Rostock

by Johann, published

Motor end for Rostock by Johann Mar 24, 2012
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Motor end for Rostock by Johann is licensed under the GNU - GPL license.

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Rostock is a delta robot 3D printer.

This part is the bottom bracket that holds a NEMA17 stepper motor, a pair of 8mm smooth rods and a plywood board.

Newer versions of the OpenSCAD source files will be published here: https://github.com/jcrocholl/rostock


Print three of these and install them at 120 degree angles on a plywood rectangle of 300x350 mm, with two corners cut off diagonally. The plywood mounting holes are sized to work with #11 wood screws or M4 screws, no nuts needed.

Clamp the smooth rod with 16mm M3 screws, washer on the outside, hex nut on the inside. Stainless steel fasteners are recommended.

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You cut the short side(300mm) or long side(350mm)? and how many mm cut the plywood?

How did you make the cut of the board?
Would you say your measurements

hi johann
I'm so excited to start doing this. but i've problem.
this plywood, how many mm cut this? its laser cutting? i know its 120 degree and it must be parallel part of 'platform' but i dont understand how many mm cut this? Could you show me your measurements on a picture?

thank you soo much for everyting

I'm waiting for your answers

Hello Johann,

Greetings from Greece and Thank you so very much for this amazing project.

i have made the build already and posted it based on the original design.. nothing changed..

The calibration was fairly easy and with a little adjustments i've printed already my first test pattern.

Although i would like to kindly ask you of your opinion on the printed pattern. what you think might be wrong for the effector level distortion on the outer circle lines at two specific points of the pattern???

here you'll see the build and printed pattern http://www.thingiverse.com/make:222673

thanks ones again for this great build, for sharing it, and in advance for your time reading my comment!!!

best regards,

Rostock (delta robot 3D printer)
by amats

Hello Johann,

Thank you very much for this project.

I just started to build it.

I am new to 3D printing and I don't understand something. In the plywood metric by Culain (which I am using as a guide) the holes are 8MM. Do the rods need to go through the plywood or just outside it like in your photos?

Could you please advise? it will save me some headaches if you could tell me.

Thank you,

for a 1 meter tall rostock what would the recomended rod thickness? 10mm rods or 12 mm rods?

I know its a late reply, but FWIW I always use stainless fasteners on something like this. The price difference is almost nothing and it means your beautiful printer won't end up with rusty fasteners.

Looking forward to the continued development of the printer!

I would love to see the legs be able to go inverted for a ridiculously tall print area too ;)

why are you recommending stainless steel fasteners?