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by grach13
Thu Aug 22, 2019 11:31 pm
Forum: General
Topic: BlueCast resin
Replies: 2
Views: 1052

Re: BlueCast resin

after more then one year , still no answer...
by grach13
Tue Jul 10, 2018 9:45 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

How to understand this? Ramp at -2C
by grach13
Mon Jul 02, 2018 2:37 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

Have ordered yellow resin, will try it, maybe its a bit better than emerald...
by grach13
Fri Jun 29, 2018 7:06 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

Very interesting post, thank you! So, i found there this: In short, ash is permanent. Once created, it cannot be removed. The only solution is to prevent ash by minimizing the time spent under pyrolysis. We must proceed from 400°F (204°C) to 800°F (427°C) as quickly as possible. It can be my problem...
by grach13
Fri Jun 29, 2018 4:52 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

Yes there is a hole. My wax castings of even very big rings are great, and only small rings casts great in resin.
by grach13
Fri Jun 29, 2018 12:08 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

I read all posts about problems in casting, i make everything as recommended,ultrasonic cleaning with dishwasher soap, without alcohol, curing in water up to 2 hours under 100W 395-400nm very powerful LED with lens, using plasticast with boric acid, made holes under flasks for ventilation, lift them...
by grach13
Wed Jun 27, 2018 5:23 am
Forum: B9R-3-Emerald
Topic: Emerald Resin Casting Issues
Replies: 19
Views: 3161

Re: Emerald Resin Casting Issues

Hi, don`t want to create new topic for same question, i`l try to ask here.
When i cast emerald resin, i often get such bad surface on castings, but only on thicker parts, how do you think, it is my casting problem or a bad curing? white gold, plasticast. Never had same on wax models.
by grach13
Fri Jan 05, 2018 3:24 am
Forum: Troubleshooting
Topic: Sudden failure, broken filters
Replies: 6
Views: 1608

Re: Sudden failure, broken filters

I`v contacted support ,but they only told me that I should change whole projector, but this is really nonsense,pay ~1500$ because of broken filter, which could cost ~30-50$ .. I just need to know what material and what polarisation of that glass filter. I ordered an IR cut filter(heat absorbing glas...
by grach13
Tue Dec 05, 2017 5:16 am
Forum: Troubleshooting
Topic: Sudden failure, broken filters
Replies: 6
Views: 1608

Re: Sudden failure, broken filters

WayneK wrote:I noticed the two filters are shattered, so are these filters available? Could the problem be something else?

HI, did you found replacement? Because i`m having same problem , did you found new glass? Where you purchased it from ?
by grach13
Mon Dec 04, 2017 6:07 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

almost a year has passed , but problem still not solved...
by grach13
Mon Feb 27, 2017 3:16 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

I know that, but i don`t know how to adjust it, because my balance is +1,000 already and it is maximum value in settings. I recoated VAT today and made all calibrations again, here are my last photos, my pegs on 3 corners are almost perfect , only B- F+ corner is to thick, and i don`t know how to fi...
by grach13
Thu Feb 23, 2017 2:59 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

I`m printing fo 2+ years, and never had such problem... This problem appears for couple months for mee. I tried the large sprue support, then printings don`t fail, but prongs on rings are much thinner on B+ side then on B-... 20170223_113955.jpg Can you please look at photos of my bubble leveler,my ...
by grach13
Mon Feb 20, 2017 9:06 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

Still need help! Bad prints.... Any ideas?
by grach13
Thu Feb 02, 2017 8:26 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

Tried in 1:1 , got same results, now with photos.
by grach13
Tue Jan 31, 2017 12:57 pm
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Re: Need help in calibration, extreeme setttings!

As i understand on B+ side supports are too thin and when vat slides,connection between ring and supports breaks. Only supports left on table, but if put ring on another side, everything is ok. Sorry do not have photos now. I bought my printer almost 2 years ago , and build it, had perfect prints un...
by grach13
Tue Jan 31, 2017 3:31 am
Forum: Troubleshooting
Topic: Need help in calibration, extreeme setttings!
Replies: 15
Views: 2840

Need help in calibration, extreeme setttings!

Need advice, cannot get good prints. I calibrated projector several times, tried with original plastic calibration grid and with printed grid, calibrated till perfect focus.I re coated my Vat on 99% flat surface, and even bought new one. Then i thought that my build table has bent, brushed it with s...
by grach13
Tue Jun 14, 2016 12:52 pm
Forum: Operation
Topic: Fast UV post curing unit.
Replies: 30
Views: 6840

Re: Fast UV post curing unit.

I`m now curing in UV nail box for 5-6 hours , this thing could save me so much time!
by grach13
Thu Apr 28, 2016 3:39 am
Forum: Tips & Tricks
Topic: Adding Air To Kiln + Castings
Replies: 42
Views: 8051

Re: Adding Air To Kiln + Castings

I just did not found melter, smaller than 1kg ....
by grach13
Sun Apr 17, 2016 1:19 am
Forum: Tips & Tricks
Topic: Adding Air To Kiln + Castings
Replies: 42
Views: 8051

Re: Adding Air To Kiln + Castings

This is my melter, it is about 4 month old,i use 1kg graphite crucibles,i change them between 15 to 20 casting,and i put them back to melter after casting. I don`t know if my melter shows right temperature, but i always check when metal melts(rose 14K gold about 955`C) and then give about +10-15`C m...
by grach13
Wed Apr 13, 2016 2:04 pm
Forum: Tips & Tricks
Topic: Adding Air To Kiln + Castings
Replies: 42
Views: 8051

Re: Adding Air To Kiln + Castings

Ok, i will make temp of flasks lower, and try to cast again,what about metal temp? I`m using electric furnace for melting , with temperature about 1800f for big rings its about 70F higher than melting point,1860 for small, is it ok? Almost on all rings i get small porosity on surface ,which can be r...

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