Working on Version 4 - Progress

A project log for 3D Printable Robot Arm

A printable robot arm, a little bigger than the usual hobby servo once.

Andreas Hoelldorfer 09/24/2015 at 12:473 Comments

I use now Nema23 steppers a high power stepper driver and a Arduino Due board with a Ramps-FD shield. I plan to build my own shield but this have to wait a little bit. I defiantly will stick to the Arduino Due. For now the Ramps-FD shield works fine and its quite cheap (25€).

Currently I'm waiting for the large bearings to arrive, they are not so easy to find. In the meantime I started wiring all up, the cable tubes inside seams to work this time so less ugly cables.

Everything looks very pomising now I'm very happy with the new design and looking forward to the all in action.

The only thing left is the rotating base. I try to get the construciton done this weekend.

I also uploaded step files on github so you can take a look on the arm.

Also all other inventor files are online.

For those who have no CAD I uploaded the robot A360Viewer an online cad viewer:

I tried Onshape but it had a problem viewing all the parts???

I regularly upload pictures in this here:


Roel Offermans wrote 09/24/2015 at 21:21 point

Congratulations on the progress Andreas! We are keeping a close eye on your project, which seems to have surpassed the Zortrax robot! As soon as we upgraded our printers' build platform we can start printing your design. A quick question arose while reviewing your design; is there a specific reason to use T5 instead of other timing belts (e.g. GT2)? The advantage of GT2 would be a higher precision due to less backlash, but it is not meant for high torques. Do you have any experience with these?

Grüße aus die Niederlande!

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jupdyke wrote 09/24/2015 at 13:59 point

Looking Great!. Thank you for uploading the STEP files and the A360 Viewer. It really helps people check out the design in more detail. When you 3d print the parts what percent infill are you using?

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Andreas Hoelldorfer wrote 09/24/2015 at 14:33 point

3 shells, 20% infill, 0.2mm layer high and solid layer every 25 layers (increases stabilitity enormus )

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