Winson
14
Yes, I let preform to orient my samples. And i have cleaned the mirrors after every failure, but nothing help.
And I have printed this part with normal resin a few days ago, everything is okay even with the resolution of 0.025 is okay. But When i changed it to tough resin, it fails again and again, I don’t know how to deal with it. I have attached the screenshot of the orientation below, you can check it.
Anyway, thanks for your help.
Winson
15
actually it’s a new tank, when i used it for the first time, the printing failed then i change the orientation of the file and change to another position,but it failed again, and i have cleaned the tank after every failure, but nothing help. I have already send email to them but it’s Saturday, I can’t get feedback until this Monday.
Winson
16
Do you have skype, I would like to add you then that will be easier for me to get the suggestion from you. actually the wall thickness is enough for printing as i have printed this samples for nearly 3 times with normal white resin.
Winson
17
0.025 is not possible for tough resin, we can only choose 0.05mm and 0.1mm, and i have already tried 0.05 and 0.1, but none of them become successful.
Winson
18
how did they help you out? can you let me know? I will leave my skype to you, if it’s possible to add me and send me the guideline?
Skype ID: winson-qi
Winson
19
it’s only been used for 40ml, not that much, So i think maybe something wrong with it, I need to inspect.
By the way, have you used tough resin before, can you give me some picture of the tough resin?
I open the new bottle of resin and pour it into the tank for the first time, I saw some particles in it, here is the picture, I don’t know if it’s normal or not.
I apologize, I do not have Skype, sorry! Ok I think from what I’ve read, it narrows it down to your resin tank and dust on the mirrors. I would follow the Formlabs guide to cleaning all of the mirrors and you will definitely want to start with a fresh resin tank. After a few failures you will most likely have cloudiness in the tank. Also check your date on the back of the resin bottle to assure its not more than a year old.
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 they’ll give you some things to try which might involve cleaning the mirror surfaces (don’t try any cleaning until you’ve 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 supports…
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 recommended…
If taken with a phone, it’s a LED flash. It doesn’t emit UV; furthermore, these resins require a lot of UV energy to start the chain reaction. There’s little photoinitiator in these.
Most likely:
- crap in your resin - if these aren’t 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 there’s 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. Don’t know never tried it myself.
Hi Winson,
I’d try to print the model without support (it’s flat on one side, isn’t 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 isn’t that Charlotte, he has plenty of supports, and the cross section of the object is small. It’s laser not curing it due to dirt.
I’m 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 I’m using ZVat trays… that’s for another discussion)
3: Settle for nice and thick supports
I used to be like some of you guys 
“What’s wrong with my print” … 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 isn’t too cloudy, etc…
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
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