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So What's a Practical Laser-Cut Clip Size?
I’ve previously shown for laser-cut elastic-clips for comb joints what the equations are for calculating maximum bending stress and operating force, using the distance that the clip has to deflect in use as the starting point. I also explained how a tapering clip profile was preferable to a straight one....
Laser-Cut Elastic-Clipped Comb-Joints
Comb-Jointed Box in Clear Acrylic. By Pete Prodoehl. Licenced under Creative Commons BY-NC-SA During a makerday, I saw a someone struggling to put together a Raspberry Pi box that they’d laser cut, and were trying to hold together: two pieces of acrylic to make the joint, and the Raspberry Pi...
Second Lattice Hinge Samples
As part of my first week as the new Technician-in-Residence at DoES Liverpool I’ve found time to photograph the acrylic test samples. From the earlier posts, this second set of samples is sized to have the minimum possible bend radius for single laser cut to create the torsional links, and...
Laser Cut Christmas Trees
I had half an hour at the end of the day at the DoES Liverpool makerspace the other day, so I had time to cut out christmas tree decoration from card and mdf that comes out of the cutter fully finished. The cut files are available for you below, or...
Lattice Hinged Booklets
A Set of Hinged Covers I’m pleased to have created a first product using the lattice hinges: a laser engraved, hand printed A5 sketchbook for Red-Violet Made. They use a pair of lattice hinges gives a double fold that operates like a normal hard back book, with a flat spine...
Lattice Hinge Design — Choosing Torsional Stress
The first set of lattice hinge tests I generated were a little fragile, with the maximum stress in the torsional links set to be 60MPa (the yield stress of the acrylic) it’s not very surprising that, with acrylic being a very brittle material (where the ultimate/breaking stress is very close...
Lattice Hinge Design — Minimum Bend Radius
The last set of hinge tests that I showed used a cut out a rectangle of material to form the links. By re-arranging a formula that calculates the required inter-link clearance, it’s possible to find the minimum number of links to make a bend using only a single cut with...
Thin-Walled Structures Journal Paper
You might have noticed that posts have been thin on the ground for the last few weeks. Along with completing the revisions for my PhD thesis (which is now submitted), I’ve also completed a journal paper that has also gone for submission. This will be the second journal paper that...
Seat Reclining Bar
When I originally posted about the seat structure, I left the seat adjustment separate from the main seat structure design. I had the ideas about how to implement the adjuster, but it needed some time to let them mature into a practical design. The idea is to use the simplest...
add_rel_lightbox version 0.4.1
Upgrade from your WordPress admin panel, or download from wordpress.org/extend/plugins/add-rel-lightbox/ When I moved add-rel-lightbox across to using Simple DOM Parser in place of the regex controlled for version 0.4, I had a little problem with the pre-release code stripping line breaks from every post that, although it didn’t cause a...
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