Quote from RobertH on December 5, 2014, 21:02
does the coating eventually wear out sometime later?
and then when it comes the sweeper part, will any uncured resin get in the way during printing the layer if there is no sweeper installed aside from sweeper mixing the resin during the process.
as for the coating eventually wearing out? no one know yet how long it will last. as for me I view the sweeper as wear factor on the glass coating and I think it is not necessary to have it continually scrap the coating there by possibly reducing it's life overall. and consider it more of a mixer for the resin only and moved it left to the next set of rail bolts and removed the springs. I am using Mike's new vat ( sweet little thang) and with the springs removed and the sweeper rotated so the flap opens when it returns to the closed closed position the sweeper follows the sides of the vat and it picks it up just before it stops. if the flap is not switched ( did that yesterday by accident) the resin will push up and possible squish out up and over on the end but even then the sweeper follows the vat sides and raised just in time to release the resin flow below it. (lucky for me) but it is important, I think, to have the flapper in a position that pushes the resin back over the window and it actually holds it there and reduces the flow off the window.
as for the sweeper removing any uncured resin in the way during printing that isn't what it does it is designed to remove the resin from the window on PDMS to allow it to get oxygenated each time it closes. it may scrap resin that has adhered to the pdms but not likely it will not do that. and any cured resin from a failed print in either case of using PDMS or the NuVat those little stray pieces are going to be floating (floaters) all around in the resin due to agitation from the wiper. the resin still flows back over the the wiper because of it's position to open the flap.
with the wiper place like I have it now I am considering reducing the amount of resin it calibrates to for the volume in the vat due to it being all pushed over the window.
just another little test.