I couldn’t say to be certain as the size of the fill, depth of engraving, and type of paint used would all have an effect. The laser does leave a good surface, ‘key’, for the paint to adhere too so I imagine they would last a long time. Of course, if there were large areas of paint fill and the fob was kept in a bag where keys, pens, change, etc, can rub against it, you would see greater levels of wear.
Is the Glowforge team still doing laser Thursday? Do they still post what they’ve made/cut? Just curious as I don’t recall seeing any new masterpieces lately.
@Dan is right! And here it is: two prototypes, one in chipboard and one in acrylic. These calipers were based off an image of a vintage tool I found online, and are used to automatically locate the centre between two points.
The prototype works very well for a first attempt, although as the curved arms are spread apart, their tips gradually rise and are no longer aligned with the central yellow component
I’ll be exploring a way to rectify this, possibly using a cam or pin and slot mechanism, so that as the curved arms are spread apart, the centre indicator gradually rises so ensure all three points remain in line.
If anyone has any suggestions, I’d love to hear them!
My Thought exactly.
Let the center sliders determine the extension of the point, I just don’t know how that geometry would translate in terms of accuracy locating the elevation of the point.
Even without auto - positioning, spread the arms to the outside edges and slide the point down to contact center. Bingo.