Sorry I just saw your other pictures, those particles in the resin would definitely have caused your problems ! Anything blocking the laser would cause the issue that you are having. If you just purchased this resin I would contact Formlabs custom service because you may have gotten a bad bottle of resin.
Winson
22
Hello, can you just give me you email address? I will send email to you, that will be easier for both of us to conmunicate with each other.
winsonqi@126.com, this is my email address.
I sent you an email Winson.
marcmoirc@aol.com is my email. Hope I can help!
-Marc
Yeah I find the tough resin is very sensitive to tank cloudiness and mirror / galvo cleanliness. If you contact Formlabs support theyâll give you some things to try which might involve cleaning the mirror surfaces (donât try any cleaning until youâve spoken to them though!) Btw if your part has a flat bottom you might be able to get away with printing it flat on the build plate without supportsâŚ
Hello!
Be sure to clean your build Platform and your resin tank. It must be perfectly transparent or the laser will fail to polymerize. Also the mirror must be perfectly clean!
Remember to change your resin tank every 2 Lt of polymerized resin.
Let me know Let me know if there are any news.
Bye!!
Taking a picture with the flash on top of a photosensitive resin is definitely not recommendedâŚ
If taken with a phone, itâs a LED flash. It doesnât emit UV; furthermore, these resins require a lot of UV energy to start the chain reaction. Thereâs little photoinitiator in these.
Most likely:
- crap in your resin - if these arenât air bubbles, you need to get rid of these. filter through paper paint strainer, mesh >280 (on ebay for peanuts)
- cloudy tank (but you say no)
- dirty galvo mirrors
- dirty main mirror, or the one under galvos. a little dust makes no difference, but if thereâs resin on it, it will make a huge difference.
n23d
29
Never used the tough resin before but sounds like you may have a bad batch. If the part prints great with your other
resins then doesnt with the tough resin then it is the resin. When it fails do you end up with chuncks stuck to the tank?
If so you might try one last trick I have heard works for others. Clean the tank coat it with rainx (brand name for a car
window treatment that causes water to bead and run off) then add resin and print. They say it makes tank last longer
and reduces peel forces so more reliable printing. Donât know never tried it myself.
Hi Winson,
Iâd try to print the model without support (itâs flat on one side, isnât it?).
In my opinion there is not too much wrong with your machine, since the support comes out nice 
Have you tried changing the point size of the support? It looks like your support cannot hold the model well, maybe because your point size is relatively small?
Goodluck!
Charlotte
It isnât that Charlotte, he has plenty of supports, and the cross section of the object is small. Itâs laser not curing it due to dirt.
Iâm not suggesting that there is not enough support, but that the contact point of the supports are too small to hold the model. Could you share a screenshot of your support settings?
Dirty mirrors or galvos - dragon skin on supports in your image is a tell tale sign.
Tough resin:
1: Sand build plate with 80 grit⌠get her nice and rough and clean.
2: Fine tuning - experiment with different heights, I find +3 work good with tough resin. ( -9 if Iâm using ZVat trays⌠thatâs for another discussion)
3: Settle for nice and thick supports
I used to be like some of you guys 
âWhatâs wrong with my printâ ⌠Now⌠if I have a problem, the printer is disassembled, galvos are cleaned, primary and secondary mirrors are cleaned, resin is filtered⌠DONE! 99 times out of 100, this solves the problem. This is assuming you have oriented the parts correctly, support material is correct, tank isnât too cloudy, etcâŚ
There are a ton of little things that can make or break a print on the form 1+ but it all starts with a clean printer
1 Like
Winson
34
Yes ,I agree with you. But we donât have the instruction from formlabs and even donât know the structure of the printer, not dare to disassemble it or we will have no warrantee, so that is the problem.
Maybe you could give me more information about the printer then I could check it myself.
Anyway, thanks for your advice.
Winson
35
Hi Charlotte,
the density of the support is 1.0, and the contact point is 0.7, thatâs the default settings, I havenât change it. the only thing I have changed is the height of Z-axis, I changed it from 0.2 to 0.
I donât know if this is the problem. Anyway, I donât want to try any prints without the instruction from Formlabs as the tank is very expensive, if I still fail for a few times, Then I will need to change the tank again but as you know I just used this tank for a few times, itâs new.
Winson
36
Hi, good news for me. But I wonder if I could clean the inside of the tank with the rainx as I want to change the resin but donât want to buy an extra tank, the tank is expensive in my country, So did you hear someone used it to clean the inside?
Winson
37
okay, I am contacting with formlabs now, I will update you with the latest news.
Winson
38
I have checked it tomorrow, but all of the items you listed could not work with this problem.
Winson
39
I am trying to email you for twice, but got post-mail back. it looks like that I canât send email to you. But I got yours.
Iâve recently started using a resurfaceable glass tank (z-vat) so have switched resins often. You donât need to fully clean the tank each time you do it, using the scraper to carefully scrape the resin out is generally enough as Iâve not had trouble with the tiny bit of resin left mixing. I have experimented with cleaning the original tanks and it made them perform worse. Iâve had formlabs tanks fail well before theyâre hit 2l resin which is why I got the glass tanks.
