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Build Your Own SLA/SLS • Top Down 3D Printer
Page 1 of 1

Top Down 3D Printer

Posted: Tue Oct 13, 2015 9:48 pm
by AhmedAdel
Hello guys,

i built my own 3D Printer using Top Down technique and i got some problems with Prints.
The Printed Part as same as the design plus some excess cured resin with it like attached photos.
propeller.jpg

propeller 2.jpg



i can't solve this Problem, i need your help to solve the problem.

Top down.jpg

Re: Top Down 3D Printer

Posted: Wed Oct 14, 2015 10:31 pm
by redonix76
Hello and welcome! Looks like it could be settling issues where it's starts to cure when the resin is still moving and haven't settled. Try bumping up the wait time in between layers...mayb3 15000 or longer, depending on how viscous your resin is.

Re: Top Down 3D Printer

Posted: Wed Oct 14, 2015 10:51 pm
by James
Is that Formlabs' tough resin?

Hopefully redonix76 has stated the solution. Can this happen anytime during the print or is it happening more toward the end or more towards the beginning of the print process?

Re: Top Down 3D Printer

Posted: Tue Oct 20, 2015 4:21 pm
by AhmedAdel
Hello Guys,

Thanks for your recommendations , its all about intensity of light and exposure time.
the problem is solved totally when i used low penetration resin.

Now i have another Problem Look for the following photo , tell me what are the probable causes of this error.


https://scontent-lhr3-1.xx.fbcdn.net/hp ... e=56285938

Re: Top Down 3D Printer

Posted: Fri Nov 06, 2015 5:18 am
by James
Glad you got it working!

As for your new problem, I cannot see your image; see screen cap.

Error screen cap.png

Seems like you told me what resin you were using, but I can't remember how you told me. I don't see that you mentioned it in this thread, but I think I remember you telling me. Did you contact me some other way like an email or something?

Re: Top Down 3D Printer

Posted: Sat Nov 07, 2015 1:15 pm
by AhmedAdel
Hey james, i don't remember too :)

i'm using MS Resin, the previous photo attached below.
how ever i solved this problem for this part while it takes place with another parts geometry.
the parameter i changed is blank time and Z Lift speed.