nanoDLP

radi2k

Member

Registered: 2017-12-29

Posts: 1

Always having stair-stepping effect

Hi!

I've built my own printer which uses a DLP projector and a UV-LED light source which has fairly high light output. I can expose images with 300ms for Deep Black FunToDo resin to fully cure 100µm layers.
However, I'm always having these ugly stair-stepping effects on orthogonal surfaces related to the build plate. This looks more or less like this:

Left is how it should be, right is how it actually looks (red: light beams from projector, black: layers being produced, gray: build plate)

Any suggestions how to solve that issue? Are these signs of overcuring and/or light bleed? Might be pixel dimming a solution to that?

I'm having that effect on all FunToDo resins blends...

Thanks,
radi2k

Shahin

Administrator

Registered: 2016-02-17

Posts: 3,546

Re: Always having stair-stepping effect

Looks like resin is not optimized for layer thickness you have chosen, try lower layer thickness see if you could achieve better result or not.

dlpuser

Member

Registered: 2020-07-21

Posts: 1

Re: Always having stair-stepping effect

Hello,

Did you find a way to mitigate this issue? I also built my own printer and see the effect. Are you using a top-down or bottom-up approach? Do you have a film to cure through or are curing to the contact of air?