Search found 75 matches

by hegykc
Wed Mar 18, 2015 7:45 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: Carbon 3D

I would guess that 0.5mm was what it took for the fep to "comletely peel off". To test continuous printing on regular tensioned fep, it would be much easier to try a simple 10x10x10 cube. Set everything to 0 in CW and put layer thickness to 10mm which is the height of the cube. Some manual...
by hegykc
Wed Mar 18, 2015 6:55 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: Carbon 3D

CW uses blank command after the slice, as far as I understand? And a 1600ms built in delay after the retract.
by hegykc
Wed Mar 18, 2015 6:26 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: Carbon 3D

Thanks for the info. A spinning apparatus would not be that hard to build today. I mean, with an arduino and a stepper motor you could even program it for that specific recipe. Heating it in vacuum under 3atm pressure also not a problem. But I wonder if nasa over-engineered it. Because they need it ...
by hegykc
Wed Mar 18, 2015 5:26 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: carbon 3D

Info for making Teflon AF sheet: http://www2.dupont.com/KIV/zh_CN/assets/downloads/DuPont_Teflon_AF_Processing_and_Use_K26986_H44015.pdf Research quantities of Teflon® AF resin in solution come in 100 mL packages, see http://www2.dupont.com/Teflon_Industrial/en_US/store/teflon_af_home.html Price pe...
by hegykc
Wed Mar 18, 2015 2:39 am
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: Carbon 3D

I think we can disregard the thickness value because: 1) permeability actually goes up with less thickness 2) it's not a linear change, but a logarithmic one 3) doesn't really matter to us 1mm thick or 0.00125mm, just how many cm3 per day and fep is 1 cm3 per day, and Teflon Fa is over 800,000 and m...
by hegykc
Tue Mar 17, 2015 8:20 pm
Forum: Display Devices
Topic: Monochrome LCD SLA 3D Printer.
Replies: 19
Views: 93254

Re: Monochrome LCD SLA 3D Printer.

Grayscale lcd info will get buried in here if we start from the basics and go over everything. Too much for one thread.

You might want to leave this one for "how to get a grayscale panel working on a pc" stuff...
by hegykc
Tue Mar 17, 2015 5:33 pm
Forum: Commerical Machines
Topic: Carbon 3D
Replies: 243
Views: 559245

Re: Carbon 3D

Here's something else: In the patent it says that the membrane/vat floor/ should have oxygen permeability of at least 10 Barrers. Definition of a Barer: http://en.wikipedia.org/wiki/Barrer basically the volume of gas going through a square centimeter of a membrane in one day. I get kind of lost afte...
by hegykc
Tue Mar 17, 2015 4:27 pm
Forum: General
Topic: New ultra fast printing process
Replies: 1
Views: 5999

Re: New ultra fast printing process

by hegykc
Tue Mar 17, 2015 11:40 am
Forum: Display Devices
Topic: Monochrome LCD SLA 3D Printer.
Replies: 19
Views: 93254

Re: Monochrome LCD SLA 3D Printer.

Hold on, my mind is still blowing up by this Teflon FA stuff :D I'm doing some UV led placement drawings about light dispersion angles and distance from the lcd, so I'll put in my part soon. But if we could get a cheaper grayscale solution, bundeled with the Teflon FA tensionVat, that would be the j...
by hegykc
Tue Mar 17, 2015 11:37 am
Forum: Display Devices
Topic: LCD Based 3D Printer - Introduction
Replies: 220
Views: 408801

Re: LCD Based 3D Printer - Introduction

3d printing learning curve is a steep one indeed :D