Sensor enlargement for Garmin Venu 3
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An enlargement of the sensor of the Garmin Venu 3 to combat wrist pain from pressure onto tendons and nerves
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Updated at source:
Model information
- Source
- Printables
- Category
- Other Sports
- License
- Creative Commons — Attribution — Share Alike
This is an enlargement of the sensor of the Garmin Venu 3 to combat wrist pain from pressure of the sensor onto tendons and nerves of the wrist. It fits the Garmin Elevate Gen 5 Sensor and thus probably also fits other Garmin watches, while leaving space to attach the charging cable to the watch. This extension might make the watch a bit less precise, but I guess only marginally.
Verdict after two weeks of testing:
printed from regular PLA → no skin irritation (might be different for you)
attached the sensor to the watch via souble-sided adhesive tape → comes loose while sweating when printed on textured PEI, not so when printed on a flat surface (like SuperTack)
I've got no pain from tendons and nerves any more → success
It might be best to print this thing from a material that is food safe, while using strong adhesive tape or even something like very thin 3M.
Print recommendation: If you don't got a super flat surface, print it with the watch facing side upwards and activate ironing, to get the area as smooth as possible, so that the adhesive tape can get a good grip on this part. This is the opposite to the picture, where I ironed the surface facing my arm.
Verdict after 2 years:
I've printed my first sensor enlargement ring from PLA and attached it with thin double-sided tape to the watch. It had no effect on my skin and lasted quite well, even though I was exercising a lot (lots of sweating).
Recently (after ~2 years of constant watch wearing) I noticed material degradation, where some printed lines broke out, but also some whitish coating. When removing the ring to replace it with a newly printed one, it fell apart into 10 pieces.
I guess this is the maximum lifespan of a PLA ring. PETG might last longer.
I noticed that a flat printing surface (SuperTack or similar) is beneficial to get two flat surfaces. A flat surface sticks better with double-sided tape and I think it is less prone to bacteria, even though they will go in between the layer and printing lines and live there.