Help getting crisper prints (DIY DLP)
Posted: Thu Oct 26, 2017 9:58 am
Hi Guys,
I've got my diy printer based on an ACER H6500 with removed color wheel (not HD6510) up and running, and I'm getting some okay results, but not great yet.
It seems like I'm overcuring in some areas and undercuring in others. Wondering if anybody has any thoughts?
Here are some photos of the Kudo Titan calibration object, at 100um layer height. It's quite the small test, but I've seen some much cleaner prints from the Kudo community.
Here's the object in question
https://kudo3dzone-qvtvw6b193qlqida8iy5 ... t-grey.jpg
Resin is Photocentric3D UV hard Grey. ~75um resolution. Printing with a tensioned flex-vat without support, although the tension isn't that high, that doesnt seem to be an issue.
~75um resolution
15 second layers
Lift 4mm at 50mm/min
Lower at 150 mm/min (first layers at 50 mm/min)
Smallest holes closing up (overexposed?)
But many pillars not surviving (underexposed)
In general, the results just aren't as crisp as I'd expect.
Projector is focused on build plate before print. Visually, it seems like there is a bit of a glow in the resin around the image, maybe causing the edges to be soft. But at the same time, undercuring small features?
Any thoughts appreciated. I'll have a wanhao duplicator 7 here tomorrow for comparison.
I've got my diy printer based on an ACER H6500 with removed color wheel (not HD6510) up and running, and I'm getting some okay results, but not great yet.
It seems like I'm overcuring in some areas and undercuring in others. Wondering if anybody has any thoughts?
Here are some photos of the Kudo Titan calibration object, at 100um layer height. It's quite the small test, but I've seen some much cleaner prints from the Kudo community.
Here's the object in question
https://kudo3dzone-qvtvw6b193qlqida8iy5 ... t-grey.jpg
Resin is Photocentric3D UV hard Grey. ~75um resolution. Printing with a tensioned flex-vat without support, although the tension isn't that high, that doesnt seem to be an issue.
~75um resolution
15 second layers
Lift 4mm at 50mm/min
Lower at 150 mm/min (first layers at 50 mm/min)
Smallest holes closing up (overexposed?)
But many pillars not surviving (underexposed)
In general, the results just aren't as crisp as I'd expect.
Projector is focused on build plate before print. Visually, it seems like there is a bit of a glow in the resin around the image, maybe causing the edges to be soft. But at the same time, undercuring small features?
Any thoughts appreciated. I'll have a wanhao duplicator 7 here tomorrow for comparison.