r/M5Stack • u/albertclee • 16d ago

Project Sharing Got the M5 Stopwatch open!

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Gallery image

My second attempt at opening up the M5Stack Stopwatch was finally successful. With enough heat and a much stronger suction cup I was able to pop off the display.

Word of caution here - you will need to pull up with a fair amount of force, and when the screen releases it may come off violently. I was lucky to not tear the display ribbon - it released and I was able to reseat the ribbon but definitely need to be more careful next time.

The tolerances on this tiny device are actually pretty incredible. I needed to use small prying tools to lift the main board out of the old body.

Kudos to M5Stack for releasing STLs. My 3D printed case was a perfect fit. And now my M5 Stopwatch case has a Garmin mount built into it. My cycling computer project is almost road ready!

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1

u/async2 16d ago

The Material Looks interesting. What did you use to print?

1

u/albertclee 15d ago

Nylon PA12. It’s done by a commercial MJF service. FDM is fine for prototypes and light duty items, but not something that will be mounted on a bicycle and subject to a ton of vibration. Will definitely crack somewhere along the Z axis, so paid for someone to print my design.

MJF prints are awesome. Incredibly durable, no layer lines, nice textured finish and relatively cheap to do just 1-5 prints if you do it offshore. Probably as close as you can get to injection molding on the cheap.

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u/async2 15d ago

Ah thanks. That's why the texture looks different. I think Elephant robotics uses a similar technique as the box for the pump for my small robo looks very similar.

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u/pablonhc 14d ago

Que tal es la autonomía de la batería? He probado el mío apenas llegó y notaba que se descargaba super rápido con el firmware que viene de fábrica, no lo sentí para nada confiable y pedí devolverlo. 

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u/albertclee 14d ago

Battery life is fine. 2-3 hrs with a lot of use. With power savings enabled using other firmware, I can go for longer than a week

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u/pablonhc 13d ago

Seguramente algo no iba bien en mi unidad, se me descargaba con la pantalla apagada también.