Charles Hartmann Tech Services

octoprint –status printing

3D printed parts & models

Practical parts designed in OpenSCAD and printed at home in ABS: camera mounts, sensor cases and fixes for the smart turtle tank. The finished models are free to download on Printables.

See the models
150 × 150 mmbuild plate
0.2 mmlayer height
ABS240 °C nozzle · 100 °C bed
3-layer raftno brim, no skirt
ls ~/prints/

Printed models

Looki L1 camera sitting in its printed black ABS cradleReal print
Printed collar clip assembled on the cradleReal print
Free on Printables

Looki L1 camera mount

A cradle for the Looki L1 wearable camera with a clip that holds it on a hoodie collar. Printed in ABS and assembled; the files are free under CC BY 4.0, and the blog post has the STL downloads.

PrintablesBuild notes + STLsShort
Printed case holding an HC-SR501 motion sensor, front viewReal print
Back of the printed PIR case clipped on a tank rimReal print
Free on Printables

HC-SR501 PIR sensor case

A case for the common HC-SR501 motion sensor with a snap-on lid, a window for the dome, access to both trim pots and a toothed clip that grips a tank rim. Printed for the smart turtle tank in about three hours, roughly 15 g of ABS, no supports.

PrintablesBuild notes + STLsShort
git log –oneline bench/

On the bench

Render of the turtle camera splash hood clamped on a tank rimDesign render

Turtle-cam splash hood

A hood that keeps splashes off the turtle tank camera and clamps to the tank lip. The first printed version snapped at its clips, so the current version is a stronger C-clamp redesign.

Render of the lanyard clip in the Looki holderDesign render

Looki lanyard clip

A lanyard clip for the same camera holder, with an eyelet for the cord. It is sliced on one plate together with the holder and two collar clips.

Printer camera view of a finished plate on the bedReal print

Watched from the printer cam

Every job runs through OctoPrint on a Raspberry Pi with a camera, spool tracking and timelapses, so a print can be checked from anywhere.

cat workflow.md

How a part gets made

  1. 01

    Design

    Parametric models in OpenSCAD, so a clip gap or a wall thickness is one number to change.

  2. 02

    Slice

    PrusaSlicer with a tuned ABS profile: 0.2 mm layers, 4 perimeters, 40% gyroid infill.

  3. 03

    Print

    An XYZ da Vinci 1.0A with a 150 × 150 mm bed, sent from OctoPrint with a 3-layer raft.

  4. 04

    Share

    Finished models go up on Printables with build notes on the Homelab the Right Way blog.

Models are designed with AI assistance and are flagged that way on Printables.

Need a part printed?

Send the idea, a sketch or a link to an STL and what it is for. You will get an answer on whether it fits the printer and what it takes.

Build notes on the blog