Search found 11 matches

by Dakota_in_the_sky
Fri May 21, 2010 10:07 pm
Forum: Scratchbuilding
Topic: Laser cutting service
Replies: 33
Views: 111065

If you can use 0.60 acrylic rather than styrene, you might get better results. All the styrene cuts I had kind of over melted, and sometimes curled. :? It depends on how strong the laser is. A stronger machine produced better results. I've used Pololu for both acrylic and styrene. They are reasonab...
by Dakota_in_the_sky
Sun Sep 14, 2008 12:54 am
Forum: Construction
Topic: Casting with plaster
Replies: 8
Views: 9119

I think the plaster I used had a shrink rate of 3%. Another brand was 8%. I can't remember what they were. I recomend using hemp rope to make the plaster stonger.
by Dakota_in_the_sky
Fri Jan 04, 2008 10:43 pm
Forum: Construction
Topic: What can you cut brass tubing with to prevent bending?
Replies: 7
Views: 5775

Re: What can you cut brass tubing with to prevent bending?

Slave1 wrote:Whenever I try to cut brass tubing it always bends at the end where I cut it. How and I supposed to cut it without it doing this?
You could fill it with sand.

Generally I like to cut and roll it - make one slice, roll it, slice, roll it, etc. I use a Tamiya Razor saw which cuts very well.
by Dakota_in_the_sky
Fri Nov 30, 2007 9:58 am
Forum: Construction
Topic: Suggestions please (on small scale RCS thruster details)
Replies: 8
Views: 4099

Do you have links to photos of this item? I'm not familiar with the term RCS
by Dakota_in_the_sky
Tue Nov 13, 2007 5:55 am
Forum: Construction
Topic: the right pot
Replies: 9
Views: 6193

I've decided to get one of these:

http://www.finishsystems.com/resincasti ... epots.html

It might be worth looking into since you don't have to convert it.
by Dakota_in_the_sky
Sat Oct 13, 2007 9:52 am
Forum: Construction
Topic: Mold Release?
Replies: 4
Views: 3495

For little jobs I like to use Pam cooking spray dabbed on with a cotton swab.
by Dakota_in_the_sky
Wed Oct 10, 2007 4:16 pm
Forum: Construction
Topic: Seeking the wisdom of the Aves
Replies: 7
Views: 3812

Talcum powder keeps the stuff from sticking. I usually use water to sculpt the stuff, so if it's wet enough, it won't stick.

I've considered using Pam cooking spray, but haven't used it yet.

Hope this helps, Rob
by Dakota_in_the_sky
Sun Jul 01, 2007 8:17 pm
Forum: Construction
Topic: Hardening 2-part epoxy
Replies: 6
Views: 4312

It's not putty, it's clear mixable epoxy glue. It's been plenty hot here and I've heard heat can soften epoxy although I don't know if it does it once it's set... If part of it hardens and part of it doesn't, it's suspect to me. You would be better off getting rid of it. You don't want something so...
by Dakota_in_the_sky
Sun Jul 01, 2007 4:51 pm
Forum: Construction
Topic: Hardening 2-part epoxy
Replies: 6
Views: 4312

I've never heard of epoxy taking so long to dry. All the brands I've used dry very quickly. I think you have a bad batch, or it wasn't mixed equally.

The best thing to do is rip as much of it out as you can and start over with a new batch.

Is this epoxy resin or epoxy putty?
by Dakota_in_the_sky
Sat Jul 01, 2006 2:09 am
Forum: Construction
Topic: Plaster for Moldmaking...Has Anyone Tried This?
Replies: 8
Views: 5496

I have used plaster to make molds of of clay patterns. I was able to make more than one because I was careful with the clay. It just needed some minor repair afterwards. Here's a link: http://public.fotki.com/robertburns/my_models/art_center_speed_form/the_process/ Keep in mind clay shrinks. The mas...
by Dakota_in_the_sky
Fri Mar 24, 2006 2:34 am
Forum: Construction
Topic: Attaching photoetched brass screens
Replies: 6
Views: 3428

To align it, I use scotch tape. I put the photo etch on the sticky sticky side. I then put it where I want it. I burnish one half of the tape. When I'm ready to glue, I lift up the unburnished side to apply the glue. When the tape is returned, it automatically goes where it is supposed to. For glue ...