| peter | Posted: 12 Apr 2026, 07:08 PM |
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 Member Posts: 10 Joined: 10-September 22 |
When Tim released the Mk IV I resisted, at first. What use is an articulating hinge for a clock that sits on my wall 24/7, and do I really need to determine the time to the millisecond? Centisecond is good enough, surely. ...and then he went and made the Acrylic Case version, and I was sold. Having made prior use of this wall mount by @avdmart for the Mk II½, I was delighted when Tim released the wallhanger4 CAD files, which also makes good use of that little void between the rear of the digit and the PCB. To save you scrolling, this is where it ends up:  Thank you Tim for producing such a beautiful piece of engineering. The Mk III was already my perfect clock; the Mk IV Acrylic has somehow raised the bar. But let's rewind. My Precision Clock Mk III has sat proudly centred above my monitor for a number of years:  I'd never been entirely happy with my screw-and-keyhole approach to mounting; something more After pondering moulds and Sugru for an hour or two, I took a different approach: I took out a Polycam trial and 3D-scanned the wall surface. (I then forgot to cancel the trial and am very grateful that Apple refunded the £149.99 I mistakenly spent. Expensive scan otherwise.) I imported the mesh into Blender, sized up a standoff, and subtracted the wall geometry from its rear face; leaving a surface that should, in theory, marry up perfectly with the wall behind my desk.  It looked good on screen. The proof would be in the printing. I loaded up the RHS in the slicer and sent it off.  The print (Bambu PETG HF) looked decent, but would it fit?  Yes. First print, perfectly flush against the wall. I immediately set about printing the LHS. I briefly considered reprinting with a screw hole, but decided to trust some VHB tape instead...  The VHB is flexible enough to conform well to the contours of the print (and thusly, the wall). And here's one more of the Precision Clock Mk IV Acrylic Case in its extended wall mount configuration.  Last edit by peter at 12 Apr 2026, 10:47 PM ------------- |
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| mit | Posted: 13 Apr 2026, 09:15 AM |
 yeah whatever Admin Posts: 670 Joined: 4-May 16 |
Wonderful! Thanks for sharing the process. Pretty impressive results you got from Polycam, I will keep its existence in mind. I too am a fan of VHB. I think I also mentioned 3M command strips, which is what I've used to mount the clock over my desk, to an admittedly much flatter wall. Since it's basically velcro it has the benefit of letting you reposition it, or remove it, though I probably take the clock down to fiddle with more often than most people need to. ------------- |
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