Source
r/resinprinting•
Pablohere

Less detailed prints

Using Mars 3 and have largely been using the ABS like material at .05 layer height, 35s base expo and 2.5s layer expo. I am, however having issues with larger pieces (boxes and terrain) where I don’t want such high quality detail and would prefer to use a .1 or .2 layer height. Using these larger layer heights results in misprints (terrain and boxes look like they were eaten by a feral beast). Does anyone have suggestions either with using this resin at bigger layer heights or on what needs to be tuned to use a bigger layer height?

Posted Jun 20, 2023, 4:37 AM UTC

114
PunkDrak•

Guys don’t bullshit. You can easily print at 100 microns even with resins that have <60 um light penetration depth. Dental applications sometimes use even 150 layer heights. You just need to adjust your exposure accordingly.

2
PablohereOP•

Do you have some suggestions around exposure tweaks for this?

1
PunkDrak•

Depend a lot on your resin. Going from 50 to 100 um I would increase the exposure 2 times, prints an exposure test print like an Ameralabs town and adjust from there. From the top of my head TGM-7 on Mars 4 DLP needed 1.7 s for 50 um and 2.5 s for 100 um.

1
Ok-Display-9204•

I think another thing dental machines have control of is light intensity. I don't think you have that on the Mars

1
PunkDrak•

Some don’t (Ackuretta), some do (Asiga), but it doesn’t matter because you can just increase the exposure time. Now sure, using something like the OG Photon to print at 100 um might not be wise due to extremely long exposure times, but it would be possible. Modern printers are much more powerful.

1
psychonautic•

Try using clear resin, the light will penetrate better

2
PablohereOP•

Thanks for the feedback, will give that a go

1
chrisrrawr•

.05 is about as big as you're gonna get. UV needs to cure through a certain amount of resin to get the reaction going and the problem you run into when trying to cure more than a certain amount is it bleeds laterally as well, creating unwanted bloat and often shifting your layers, sticking to the fep too much, and in general creating unintended side effects.

If youre finding you need larger less detailed prints, it may be time to grab a couple cheap filament printers.

1
PablohereOP•

What I’m curious about is why even advertise that the printer can do that? Looking at the Mars 3 documentation it states that it can go up to 0.2 Are there other resin types that can do larger heights?

1
chrisrrawr•

Probably in lab testing, for specific shapes or printing tests.

They advertise it because it's a big number that's not a lie.

1
Adorable_Ad802•

You can't print these layer heights with this resin, the UV can only penetrate 70-80micron of this stuff

-3
PablohereOP•

That makes a lot of sense and seems consistent with my testing. What resin would you recommend for this type of layer height?

1
PopeofShrek•

I wouldn't recommend resin at all, even if there were a resin for it in the long run it would be more expensive to keep buying this expensive specialist resin than it would be to just get a cheaper filament printer and use that. If you don't want filament just wait for the .05, you'll have really nice looking terrain, and realistically you aren't even gonna be able to finish painting up any big pieces of it before the next one is out of the printer anyways.

1
Adorable_Ad802•

The new high speed resins from anycubic, they are made to be printed at big layer heights.

1