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[M][P] Attempt7.2 - 8 and magnetic straps

A project log for Tetent TimerSpy [gd0136]

A wearable PDA / smartwatch with a Tetent [gd0090] input method.

kelvinakelvinA 10/20/2022 at 18:310 Comments

[20:15]

Attempt7.X

I think the latest was 7.3, but the adjustments have been slight since Attempt7 so I'm just going to bundle them all in this paragraph. 

The changes was that I changed the strap location to be in the middle of these Tetrinsics. I also tried the thumb at a 12 degree angle and didn't feel like I needed to change anything. Additionally, I replaced the somewhat arbritrary 8.X degree main draft with a more concrete 3-point plane.

A few days ago, I had also discoved this strap and bought 2 of them.

What I was doing was looking for a silicone strap and found one that looked like the white one I have now and one that had more holes and a dual colour design:
Then I remembered what I said, which was that the strap is the main thing in contact with my arm. Thus, the ideal solution would be a strap that was breathable. 

However, in the corner of my eye, I also saw this silicone strap with a clasp design:

I thought, further motivated because of how large Timespy is, it'll be a nice feature if I didn't have to carefully button through the correct hole and then neatly tuck away the extra strap length every time I put it on. This also reminded me that more strap materials exist than just silicone.

First, I did some more research on watch straps and saw:

and I think "Manne I got to choose wisely because the strap can also make or break the entire look!".

I widen my search results and soon find this strap:


I loved the look of this, would be breathable and looks really flexible, so I start searching specifically for mesh watch bands.

BAM! I see this and immediatly exclaim "The future is WOW thanks to SCIENCE!!". Infinitely adjustable! Completely breathable! Cheap and looks amazing! 

I start watching YouTube videos to see if this is legit (seemed so) and then read both positive and negative reviews on Amazon. Everyone that commented on the magnet strength said that it was strong enough for the job (which was my main concern, can confirm) and the only review that gave me concern was one talking about the poor paint durability of the black version (lightly grazed a pair of scissors over one of the lug holders whilst trying to optimise my way of installing them and the paint discoloured, so I unfortunately can also confirm). After hours of deciding, I decided to go with the black version. 

I'm going to play it safe and use dark grey or black as the accent colour IRL (the light green parts in the renders) because I don't want to strart tracking down a light green PETG (or any FDM filament with the #SecSavr Suspense [gd0105] in view).

This is what Attempt7.3(?) looks like:

The strap is thin enough to easily slip slightly underneath my jumper sleeve.

Attempt8

The only thing that was annoying me and the only thing I changed was the position of the strap. Basically, Attempt7.3 constantly was constantly squashing some bone bump where my forearm bone ends and wrist starts. In Attempt8, I reworked some faces and aligned the strap to Tetrinsic Finger2:

Printed it, put it on and my reaction was, essentially:

Source

It's the moment when everything finally aligns ergonomically. It doesn't feel too tight and loose at the same time or slides around too much or slides over the wrist.

It's the first time I'm just mirroring the STL in Cura and reprinting, with 0 changes required!

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