Search found 61 matches

Go to advanced search

by Stephen Attaway
Sat Jun 30, 2018 7:32 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3160

Re: Emerald Resin Casting Issues

A key to ramping fast is to make sure that flask is completely dry. A long hold at 274F or 350F is needed to insure that water is removed from the flask. I use a convection oven during this stage of the burnout. After all the water has been removed, I move the flask to a pre-heated burnout oven. Eve...
by Stephen Attaway
Fri Jun 29, 2018 6:12 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3160

Re: Emerald Resin Casting Issues

Eric Paul Marvets has done extensive research on casting resins. His paper from the 2018 Santa Fe Symposium can be found here: http://www.santafesymposium.org/2018-santa-fe-symposium-papers/2018-resin-casting-a-collection-of-hypotheses Three key ideas: 1) Resin has residual stress that can damage pl...
by Stephen Attaway
Wed Mar 14, 2018 5:40 am
Forum: B9R-4-Yellow
Topic: Yellow prints cracking
Replies: 6
Views: 884

Re: Yellow prints cracking

You may want to check the slice preview to make sure that the slicing is correct.
by Stephen Attaway
Thu Mar 08, 2018 5:52 am
Forum: General Discussion
Topic: The problem of wave
Replies: 27
Views: 3273

Re: The problem of wave

I would recommend tilting your model. To understand why, think of the mechanics of what is happening when the first horizontal layers are being printed. The layers are only .03 mm thick. When they lift off the surface, they are not very stiff. When they are pushed back down on the surface, they must...
by Stephen Attaway
Sat Feb 25, 2017 4:49 pm
Forum: General Discussion
Topic: Casting Machine
Replies: 6
Views: 1524

Re: Casting Machine

The finished chain was 57 grams of 18Kt yellow gold. I think I had about 250 grams in the supports. This was my first time to cast a chain. I now include most of the sprue with the print from the B9. The great thing about the J2R is it can melt 1000 grams of gold. Make sure that the feed stock is sm...
by Stephen Attaway
Fri Feb 24, 2017 5:47 pm
Forum: General Discussion
Topic: Casting Machine
Replies: 6
Views: 1524

Re: Casting Machine

I use the J2R with the B9 1:1 mix of cherry and red.
The tricks with all castings are curing and burnout. The J2R works great with the B9.

Here is an example of an 18 Kt chain that I cast using the J2R.
Steve
by Stephen Attaway
Fri Feb 17, 2017 6:31 am
Forum: General Discussion
Topic: Core 530 vs. 550
Replies: 66
Views: 13200

Re: Core 530 vs. 550

I often only grow one or two rings at a time. There are, however, cases where I need 40 rings. Currently I am only able to grow 10 per run, so I have to grow 4 sets. With a 4x increase in size I could grow all these at one time. I also on occasions grow bracelets and large pendants. With the current...
by Stephen Attaway
Thu Feb 16, 2017 4:28 pm
Forum: General Discussion
Topic: Core 530 vs. 550
Replies: 66
Views: 13200

Re: Core 530 vs. 550

Does increasing the build platform size by 4x increase the cost in a non-linear manner the same way that going to 15 micros causes the cost to go non-linear?
by Stephen Attaway
Thu Feb 16, 2017 3:50 pm
Forum: Materials
Topic: Resins Data Sheets
Replies: 16
Views: 4571

Re: Resins Data Sheets

I got a feeling that I might have unintentionally started a Form x B9 rivalry. Sorry if you thought my post was trying to make the Form2 look better than the B9. The are both well built machines, but have different market targets. I own a B9 and have unlimited access to a Form2. I also have a DWS00...
by Stephen Attaway
Fri Feb 10, 2017 7:02 am
Forum: Materials
Topic: Resins Data Sheets
Replies: 16
Views: 4571

Re: Resins Data Sheets

The goal of utilizing 3D printing in direct manufacturing is huge. While this forum is focused on using 3D resin printers for jewelry, the much larger market for 3D printing is used for general manufacturing. Imagine that I wanted print a custom made football helmet (for NFL football). How would I k...
by Stephen Attaway
Wed Feb 01, 2017 5:51 am
Forum: Official News and Updates
Topic: The B9 Core Series is coming...
Replies: 93
Views: 19372

Re: The B9 Core Series is coming...

Can someone provide more information on the new $990 DuraVat for the B9 Core? It sounds like one tough vat if it can survive 600 prints without degrading. Does the B9 Core have a sweeper? How does the B9 Core parts release from the vat? Is it still a slide or is it a peal/tilt action? Is there a vid...
by Stephen Attaway
Tue Jan 31, 2017 7:57 am
Forum: General Discussion
Topic: help with inconsistent casting
Replies: 19
Views: 4751

Re: help with inconsistent casting

I place my models in a plastic bag filled with water and a drop of soap. After shaking to agitate the part, I drop the bag into an ultrasonic cleaner half filled with water for a few minutes. This dip is followed by a rinse to get the soap off the part. Next, I blow canned air on the part to remove ...
by Stephen Attaway
Fri Jan 27, 2017 6:51 am
Forum: Tips & Tricks
Topic: BEST CAD PROGRAM?
Replies: 13
Views: 5844

Re: BEST CAD PROGRAM?

Again I work in CAD everyday of my life... so difficulty to use is not a problem for me. I also started jewelry design with an extensive engineering based CAD background. For jewelry design, I use a combination of SolidWorks and 3DCoat. Although my wife and I began our jewelry business in 1987, I b...
by Stephen Attaway
Sun Jan 15, 2017 11:52 am
Forum: 3D Printing
Topic: BETTER SUPPORT MODE
Replies: 4
Views: 1533

Re: BETTER SUPPORT MODE

If you have flats that are parallel to the PDMS surface, then the first unsupported layer of the flat will be only 0.03 mm thick. When the layers are this thin, they are not very strong and will need lots of supports. Try using the preview to see layer by layer the print as it is exposed. The previe...
by Stephen Attaway
Sun Jan 15, 2017 11:45 am
Forum: B9R-3-Emerald
Topic: Emerald - Can Be Left In VAT?
Replies: 4
Views: 1867

Re: Emerald - Can Be Left In VAT?

I have had no problem leaving Red/Cherry 1:1 mix in the vat, even for one to two weeks at a time. I use a rubber spatula to mix the resin before printing. I mix for a few minutes making sure to wipe the PMDS and the deep part of the vat with the spatula. When the resin is uniform in color, I start p...
by Stephen Attaway
Sat Jul 02, 2016 11:54 am
Forum: Photo Gallery
Topic: Punk Minion
Replies: 13
Views: 3912

Re: Punk Minion

I was able to edit the file FileVersions.txt to insert a new support with a custom name.
Steve
by Stephen Attaway
Sat Jul 02, 2016 11:34 am
Forum: Photo Gallery
Topic: Punk Minion
Replies: 13
Views: 3912

Re: Punk Minion

Mike,
Thanks for this advice. I was able to edit SUPPORT_Cone 25%.stl and replace it. I did not see how to create a custom support with a different name within layout.
Steve
by Stephen Attaway
Mon Jun 27, 2016 4:01 pm
Forum: Operation
Topic: Fast UV post curing unit.
Replies: 30
Views: 6840

Re: Fast UV post curing unit.

My unit came with orange glasses. When do I need these glasses?
Thanks,
Stephen Attaway
by Stephen Attaway
Sun Dec 27, 2015 5:42 am
Forum: B9R-1-Cherry
Topic: B9R-1-Cherry - Curing and Cleaning
Replies: 11
Views: 4622

Re: B9R-1-Cherry - Curing and Cleaning

it doesn't make sense to me that it should take hours for a part to cure when it takes less than 3s to cure a layer. i'm printing in B9 cherry. The pigment in resin is designed to absorb light so that you do not get Z-depth bleed through. The non-linear laws of absorption physics are such that a ve...

Go to advanced search

cron
Close Menu Shop Forum