General discussion - LASER CUT PPE/FACE SHIELDS

jemdur, hope you are making progress.
I just noticed when burning today that on the adjuster straps I had managed to leave a couple of very small elements on the drawings which should not be there.
When you cut the adjusters you end up with some v. small holes burnt at the end of the adjuster V’s

I am about to upload the cleaned up files to dropbox, if you have downloaded you might want to download a fresh copy.

arrrrrrrrgh, forum is limiting me to 3 replys per post (smokey, something you can change?)
try this:
Hi Jerry,

I just imported your dxf file into my 3d design software and there were missing elements usualyy on the curves on the fine detail.

When I imported the same into coreldraw 2020 they were all there.
assuming your version of corel is showing all is ok, can you change the colour of the internal cutout parts:
1 2 3
then save it as a dxf.
Can your laser software then pick up these different colours let you set which to cut first on your laser?

If you have lots of ‘yes’ answers, go for it chap!

Is anyone else getting faster than usual filter clogging with PP? It’s also depositing a lot of white powder on the lens holder.

Yes. PP generates a heavy white dust that will fill your pre-filter up consider running with simple extractions (no filter) or rig a pre-pre-filter out of some gauze or something and check it regularly. Keep lenses clean with air assistance and good extraction.

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Has anyone got a decent, reliable supplier of acetate/PVC?

We have knocked out our first 1000 but we are about to run out of the PVC.

Ordered from Viking Direct last time

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km-wholesalesuppliers, also have it and have just re-opened after locking down.

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Has anyone else found the acetate sheet sometimes keeps popping off?

Not as of yet.

Have you checked the hole punch settings?
The standoff acetate holders are spaced so that the acetate should be held under tension.
Are your standoff holders failing (ie bending all the way over) or are holders not gripping the acetate fully?
Holders being this bit: Screenshot from 2020-04-18 09-19-35

Are you using a 2 hole punch on the A6 setting? The 888 setting or the A5 setting on a 2 hole punch is no good. If you are using a 4 hole punch… also no good for this design.

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I’m trying out an extra slot in each end tab of the top cover to secure it a little more

Experimenting now, and will share

Anyone else had the top bit come off in transport/packing?

On the top cover, I’m yet to have a hospital or clinic request it even though they’ve seen it and have samples etc. Doesn’t seem to be something they need.

However I’ve also notice a lot of folks putting h the cover on after the shield, of you put it on before the shield then it holds to my knowledge.

I’ve been trying to get the tops on before visors, but just doesn’t seem to work… maybe it’s a slight inaccuracy in our hole punch…

We gave up on the tops, they were fiddly to fit and just a) used up PP we could use for more visors b) slowed up how quickly we could assemble them.
On Friday PM we had a stream of cars arriving to pick up!

What thickness of PP are you using @Dermot and what thickness of PVC/Acetate for the shield?

The top cover was to address the large numbers of hobby-engineers who said it must have a top cover. With the exception of one or two individual medical professionals, who for their specific situation needed a top cover, I’ve yet to have any of the PPE folks at the hospitals and GP practices and clinics (i.e. the central coordinators) request them.

I trialed one using 0.8mm and it was not easy to fit/keep in place

No doubt the files would benefit from a tweak. It’s not been a high priority, due to lack of demand. Really it was to placate the “MUST HAVE A TOP” lobby!

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I fully understand, we are struggling to keep up with demand for basic ones.
Not had a single request for top piece.

Unlike, testing and apps, any face shield is better than no face shield!

Hello Everyone, you’ve all done a superb job of getting lots and lots of PPE into the hands of front line health care staff, care homes, for key workers and the rest!

I’m getting a real sense of a sudden drop in the call for face shields. Our biggest “customer” in Nottingham just confirmed they have a good supply of face shields and also a supply of the kite-marked BS standard shields now too.

My team are finishing up the materials we have cut into flat packs and bags of 26 complete face shields for smaller groups and care homes, but I suspect I’ll have a big pile of them left at the end. I think it’s important at this point to reflect. We should be ready to fire up the machinery should it be needed and ready to flex our design muscles should a different challenge arise too! But for now, it feels like we’re nearing the end of the PPE crisis, though we’re probably still in the early days of the Corona Virus Crisis.

I’d encourage you to think about responsible and environmentally ethical ways to dispose or reuse any surplus face shields and parts you have. For my part I’ve stopped cutting for now as not to waste he PP sheets I have left (about 45). What news can you bring me from where you are? Have you reached out to the folks you’re supplying to see if they still have need? Let me know if you know of somewhere still desperate for shields, as I suspect the glut won’t be uniform in all areas.

At the start of this, when I was still 3D printing at home, I anticipated that I’d be providing a few dozen shields as a stop gap for a week or so until “big industry” kicked in to make something less ad-hoc. It’s gone on a lot longer than I thought!

I want to draw peoples attention to my friend Sean Drummond who drew up the original polypropylene face shield design, I’ve seen dozens of schools and design firms claiming it’s is their “own” design, I suppose once you’ve laid it out in a cutting software or made some small tweaks, it IS your design. I’ve not heard Sean be anything other than humble about his part in it. If you thought his design was good, maybe you should go say so on his Linked In page.

https://www.linkedin.com/in/drummond1/

I’d also like to take a little time to thanks @phillw who has been here helping lots of you with the forum and your work on the face shields. Thank you so much Phill. You’ve made things much easier for me during this time by taking away much of the stress of looking after people here on the community.

I really hope many of you will stay and ask for help with your laser cutters, or show other people how to find this forum. It’s to help anyone who has a laser cutter problem. I started it after I saw how horribly toxic and masculine places like Sawmillcreek and Facebook help groups can be. The facebook groups especially annoyed me as there wasn’t 2 serious answer in any 100 answers given.

As a reminder, Smoke & Mirrors is a UK based laser cutter sales, service, repair and support company and we specialise in helping makers and schools keep their laser cutters running! We sell all sorts of mirrors and lenses (check the shop icon at the top). But really our main service is to help you get the most out of the laser cutter you have. If you’re not sure about something, we’ve probably got a helpful hint or video or can give you an idea here on the forum.

Well done everyone. Your face shields have certainly saved lives!

Dominic aka Smokey

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Big up to you and your team for taking the lead on this.

I think we are still supplying plenty to care homes.
To all the cutters out there, I thank you for your time and effort. Just goes to show you what a collective effort, for a common good, can do.

If you do find yourself with excess shields, do ring round the care homes.

Smokey has found himself another customer in the wilds of the NE.

Ill still be hanging around here if you need anything I can be of use with.

Stay healthy.

OK its nearly 11am. so I’ll sign off for now.

Cheers
Phill

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I was on Radio 4’s PM talking about laser cut PPE yesterday

about 1 hour 14 mins.

In the full interview there was mention of the many makers and schools doing the same, but it all got edited down to a cozy 3 or 4 mins! Well done everyone.

Smokey

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