Yet another paper tray design… This one holds an 8 1/2 x 11" piece of paper, preventing the cut paper from being blown around by the Glowforge fans. This paper tray is intended to replace the existing Glowforge Crumb Tray, sitting directly on the bottom of the Glowforge bottom surface; the height of the metal mesh is exactly the height of the Glowforge Crumb Tray. As such, there is no bottom on the box.
I apologize to anyone who is might want to duplicate this design. All of the non-wood components were random parts that I had lying around my basement. This included the following (w/ sources as I could find them):
The metal mesh is squashed between two wooden border pieces, forming what looks like a picture frame with a mesh. Tightening the screws that hold the two wooden borders together seems to have made the metal mesh fairly rigid. The wire mesh “picture frame” is then glued to the vacuum tray, thus forming the top surface of the tray.
A last minute correction to the design included the addition of the four square braces on the inside corners of the box to improve the strength of the frame.
I also recommend placing a strip of metal underneath the battery to prevent the laser from accidentally cutting the battery (at least that seemed important to me because I used a Lipo battery.
Sorry, I can’t upload more pictures… The website says I’m a “new user” and can only upload three pictures. Maybe I’ll post more pictures when I’m older
I like the trick of no bottom, that’s a slick way to get some vertical height.
I looked up your fans, as they’re the real wildcard here:
In particular the static pressure rating of roughly 0.0039 PSI seems really low for smaller parts. I get that these were the parts you had lying around, they’re totally worth a short. I’ll be curious to see if you find them strong enough to keep parts from flying off.
For more on static pressure:
If you do find that your vacuum isn’t quite keeping pieces where you want them, I do like my air assist fan reducers…
Sort of… I think the big advantage to higher static pressure rating is that you can cut smaller pieces and they’ll have greater downforce to stay put. If you’re cutting a piece out of paper and it only has 1 square inch of area then you’re only getting 0.0039 lbs of downforce. Burlier fans can bump that up to .03, maybe 0.04, it’s still not a great deal of force. This is all so experimental that it’s not even clear how much force is enough.
If your works well for you, then it’s perfect, you know? That metal strip under the battery was a great idea.
You could make various sized “frames” that you would place in the tray to take up the space around smaller pieces of material. That would increase the suction as the entire bed would always be covered.