Calibrator horizontal expansion not correct for models

Luca Spagnolo

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Jul 19, 2022, 4:25:19 AM7/19/22

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Hello everyone,

I am new to the InMoov project and I decided to start building it as a long-time project because I've always loved robotic, programming and 3D printing.

First of all I want to thank Gael for his wonderful work, love it!

I decided to start with the eye mechanism because I already have some SG92R servos, so I decided to calibrate my Ender 3 V2 with Cura Slicer and I got the calibrator fit perfectly with -0.10 horizontal expansion.

I then started to follow the Eye Mechanism tutorial and printed the EyeBallFullV2, but I noticed that when mounting the pieces, there is a (0.5mm) gap between them. So I tried to re-print them with the default horizontal expansion of 0.00mm and they fit perfectly.

Am I doing something wrong? Do you guys have some ideas or suggestions?

Thanks in advance,

Luca

Stéphan Lemaire

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Jul 19, 2022, 10:03:59 PM7/19/22

to Luca Spagnolo, InMoov

Hello Luca,

For my robot I made different printing set-ups (maybe 10) because most of the time I printed the parts at 30% plastic infill and sometimes I also printed at 100% (for the Worm Shafts and gears in particular (and without support). But sometimes we have to use supports or raft so I also created a model 30% infill with supports with and without raft. So do not hesitate to make different set-up and use them according to the parts printed on your printer bed. The expansion -0.1mm is more used for parts with lock and key like the parts for Torso.

Keep your good work!

Stephan

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Luca Spagnolo

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Jul 20, 2022, 9:58:03 AM7/20/22

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Hello Stephan,

thanks for the quick reply.

After some other printing attempts with different settings it turned out that I needed to calibrate also the holes horizontal expansion in Cura, after that the calibrator and the eye balls fits perfectly! Along the way I will find myself creating different print profiles for the various parts of the robot, I will keep in mind your suggestion, thank you very much.