PPE CNC Projects?

Hi All,

I’m not a Facebook member and don’t wish to be, so I’m afraid I can’t join the forum discussion over there. Dave Riganelli started a discussion over there about possibly CNC cutting head gear for facemasks to support the need for PPE. There is a design around that uses 3 hole punched overhead transparencies on a compression head piece.

I’d like to take a stab at CNC cutting the head piece but I don’t have the files. Would anyone here know where to find them?


Jeff, ditto on Facebook. I’d be very interested in the head gear files, too. Thanks to whoever can pass them around.

My wife has a facebook account and she found Dave on there, but there is nothing on his page about PPE headsets. He has a Youtube channel, too, and there is nothing on it about PPE, either.

He posted in a thread on the Sienci group on Facebook. I wish they would migrate everyone here but I can understand why they don’t want to risk losing anyone.


I misunderstood, Jeff. Sorry about that. When my wife returns home, I’ll ask her to look for it.

Thanks Grant, much appreciated.


Here is a link to dxf, pdf and stl files for the shield frame. I’ve just found this, so have not tried any of them yet. I will open them in vcarve and, assuming that I can create toolpaths, I’ll post them here.


Using VCarvePro, I could not open the dxf file at all and the stl came in looking at the frame from the y axis, and I don’t know enough to get it to “flip” somehow to get it oriented in z.
I did get the pdf imported, cleaned up and ran tool paths. I have not cut it yet, but it looks good. I don’t know where I would be able to find suitable plastic anyway, but I figure that if we can get good files or gcode, maybe some have materials. The Georgia Tech site says that, ideally, they are 3/16" thick, but that 1/8" should work. They advise against 1/4". I imagine another factor must be the flexibility of the material.

I ran one in 1/8" mdf just to see how it would work out. It works very well.

This forum does not accept dxf as an upload file format so I tried to attach an svg. It seems to take the upload, but does not show in my post, so I don’t know how to do that, obviously.

The pdf file on the Georgia Tech site works well in VCarvePro, though.

Thanks for the link. I’m going to give this a try today if I have a thin enough material in the shop. Not sure what I have on the shelf below 1/4", hopefully I can find something.

I don’t have any suitable plastic, which his really what is needed. I also don’t have a source for the plastic/acetate for the shield itself. One of the sites said that you could use overhead transparencies. I have a box of them, but they are way to thin.

Hmm I hope my transparencies might be ok, if not I’ll try and return them I guess.

I have the file open in Fusion now, but wow the tolerances are down to 1mm in places. What did you use to cut something so fine? I don’t think I have any suitable bits. :frowning:

I used a 1/16" downcut endmill. I did a simulation using a 1/8" and it did not work at all. The 1/16" did very well. The small hooks that the shield engages look perfect. They are the most precise detail.

I just ordered a 1/16th yesterday from Amazon but it won’t be here for a few weeks due to being low priority. I will double check but I think I broke anything that I had that was even close to that small. The cost of learning CNC. :slight_smile:

Certainly, if you look at them the wrong way, they break. I hold my breath every time I use the probe module with one. FWIW, I got mine from Lee Valley.

Well, as I learned reading about the Nemi Ships, sometimes the right answer is that if you can’t raise the boat, lower the lake. I’m wondering if I can modify the design slightly to accomodate 1/8" tooling. Looks easy enough for the inner piece. The part around the tab requires more thought.