We are planning to introduce a top down SLA 3D printer.
The core part is a closed-loop resin level control system to eliminate liquid surface tension error and control liquid level accuracy ± 0.005mm, and a vaccumcoating system for accurate resin coating.
Current Specs:
Scanning method: Galvoscan
Forming direction: TOP-DOWN
Spot diameter: 0.05-0.10mm
Print size: 130 * 130 * 180mm
Layer thickness: 0.03-0.15mm
Resolution: 0.025mm
Pros: very stable printing with 99% success rate; no VAT needed; support all types of resins; easy to exand to large print area.
Cons: a little slow since each wiper coating takes 5-8s; require a lot of resins to start (>3L)
https://youtu.be/p_aMqPiCMBQ
https://youtu.be/TEO0C3qO644
Any thoughts and suggestions?
The resin volume is always a tough sell for this style of printer.
There was research into using glycerine or salt water (something with a higher specific gravity that isn't a solvent to the resin) to allow a smaller amount of resin to float on top of it. Since you are really only concerned about the upper surface, the variability of the layer between the two liquids shouldn't affect the operation.
I do like the concept of the top-down printer. No more pull forces damaging or pulling the print from the build plate. Less support required, but overhangs would still need something to attach it to the main model.
What is the estimated price range for this printer?