Search found 31 matches

by 258cj7
Mon Jul 14, 2014 9:32 pm
Forum: Vat Design and Construction
Topic: Flex bottom VAT
Replies: 70
Views: 30996

Re: Flex bottom VAT

Wow, Great idea! I tried to stretch some fep but couldn't get it taught enough.
Is there any danger of the fep rupturing and leaking resin resin onto the projector? How thick is the film?
by 258cj7
Mon Mar 10, 2014 11:25 am
Forum: Display Devices
Topic: uneven curing of the edges
Replies: 12
Views: 6212

Re: uneven curing of the edges

Any ideas how to create a mask image?
by 258cj7
Fri Feb 21, 2014 10:46 pm
Forum: Vat Design and Construction
Topic: Generic Sylgard Substitute $37.00 at Amazon
Replies: 3
Views: 6275

Re: Generic Sylgard Substitute $37.00 at Amazon

Just the bottom of the vat is glass. It is held in a 2 piece frame of HDPE that clamps onto the glass. I put 1" blue painters tape around the edge of the glass to make a wall. I pour in the Sylgard, wait for it to level and for the bubbles to go away (or vacuum degass if I'm in a hurry). I bake...
by 258cj7
Thu Feb 20, 2014 10:58 am
Forum: Resins
Topic: top down with resin floating on water or ???
Replies: 29
Views: 15734

Re: top down with resin floating on water or ???

What happens when the pigment settles to the bottom of the resin layer? does it stay at the boundry between the resin and the saltwater or does it settle to the bottom of the saltwater layer where you can't just stir it back up.
by 258cj7
Mon Feb 17, 2014 11:59 pm
Forum: Display Devices
Topic: Ensuring Squareness of Projection
Replies: 4
Views: 2669

Re: Ensuring Squareness of Projection

I drew a rectangle the size that I wanted the projection to be (3"x4") on a piece of paper. I placed the paper on the vat floor and adjusted the alignment of the projector and zoom to match the rectangle.
by 258cj7
Sun Feb 16, 2014 8:43 pm
Forum: 3d Prints
Topic: photos of a 3d print made on my updated printer
Replies: 5
Views: 3470

Re: photos of a 3d print made on my updated printer

I'm also using a projector with the color wheel intact. The only mod was to the focus ring. Cure time for MakerJuice SubG+ is 5.5 seconds.
Mitsubishi XD430U 1024x768 native 230w UHP bulb
by 258cj7
Thu Feb 13, 2014 4:43 pm
Forum: General
Topic: Top down wins...
Replies: 15
Views: 17770

Re: Top down wins...

I hollow large parts out before I print them mainly to reduce warpage, but helps on saving resin also. Do you create a drain hole in the stl model or do you drill one after it is printed to drain the trapped resin? The ability to hollow and create drain holes would be a nice addition to CreationWor...
by 258cj7
Thu Feb 13, 2014 1:20 pm
Forum: General
Topic: Top down wins...
Replies: 15
Views: 17770

Re: Top down wins...

I would think that the level drop from resin shrinkage would be negligable (Unless you are printing something very large that nearly fills your build tank). One other thing to consider would be the displacement from the platform supports (not the platform that is already in the tank) as they lower f...
by 258cj7
Thu Feb 06, 2014 2:14 pm
Forum: Hardware showcase / Build Logs
Topic: 3D DLP printer greatly improved print quality with flex fep
Replies: 28
Views: 13860

Re: 3D DLP printer in concept stage

Interesting Z axis design. Does the slide maintain stability at full extension? (When the two pairs of rollers are close to each other). It's probobly not an issue unless you plan on printing really tall things.
by 258cj7
Sun Feb 02, 2014 6:42 pm
Forum: Hardware showcase / Build Logs
Topic: SLA Project built with (mostly) recycled/salvaged parts.
Replies: 33
Views: 15951

Re: SLA Project built with (mostly) recycled/salvaged parts.

It's looking good. Just one thing I see from the picture is the size of your platform looks like it is almost the size of the vat. Don't forget it will displace a lot of resin when it is lowered to the bottom of the vat and might cause an overflow. Also, with the passive tilt, go easy on the speed o...