Search found 33 matches

by crusoe
Wed Oct 07, 2015 6:31 pm
Forum: 3d Prints
Topic: weird surface finish - flakes every where
Replies: 4
Views: 6921

Re: weird surface finish - flakes every where

Perhaps you are retracting too far or not square so some parts of a layer don't stick leading to flakes.
by crusoe
Mon Apr 27, 2015 12:21 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

Biggest problem with argotec is gonna be chemical inertness. Its apparently urethane based, but so are many photoresins. I suspect they will chemically bond. I'd check your light source. With Near-UV leds, cure for me with fep is near instaneous. That or mcMaster sent you the wrong material. Got my ...
by crusoe
Sat Apr 25, 2015 12:07 am
Forum: Hardware showcase / Build Logs
Topic: Sub $1000 build, including projector
Replies: 5
Views: 6488

Re: Sub $1000 build, including projector

Got fep film from CS Hyde. For being a teflon relative, its surprisingly tough stuff. Resin beads up on the film, but spreads out on glass. I tried curing a blob of resin with a near uv LED, and it fell off when touched. Basically near zero adhesion force. I then smeared a thin layer of resin onto a...
by crusoe
Thu Apr 16, 2015 7:27 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

TPX is only 1 Barrer or so. Concentrating oxygen can be dangerous.
by crusoe
Thu Apr 02, 2015 4:49 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

Yeah, we know. The Titan likely isn't as fast as the carbon3D, but it is a pretty damn fast printer.
by crusoe
Thu Apr 02, 2015 3:15 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

The Titan 1 is basically a flex vat variant. One side is fixed by a clip, and as the print is lifted this induces a peeling motion.
by crusoe
Wed Mar 25, 2015 7:47 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

Not high enough. What they call high is less < 1 barrer.

TPX has higher gas perm than PolyEthylene, and TPX is still WAAAAY lower than Teflon AF. About 1 barrer.
by crusoe
Tue Mar 24, 2015 4:09 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

But how is this an issue if the surface is always below the resin and thus wet?

I mean if large flat areas might cure all the way to the top of the liquid resin, then you have a problem.
by crusoe
Tue Mar 24, 2015 4:00 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

What if you dithered the image? Instead of printing 1 large flat area all at once, send two images, say a checkboard, where the black squares in one image are the white squares in the next and vice versa. So each layer shoot two images. Then your max cure area at any one time is the size of the chec...
by crusoe
Mon Mar 23, 2015 11:50 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 196556

Re: Carbon 3D

Well he just started trying it out, and the rook print he's produced later has much better finish.