8962RE: Re: RE: Re: Re: [diy_3d_printing_and_fabrication] RE: RE: RE: RE: Highest DIY XY resolution ?
- Oct 15, 2013
"floating resin on another liquid" ?? Graham, were did you get that bit of info ?
---In firstname.lastname@example.org, <email@example.com> wrote:The f-theta lens does not make the beam perpendicular, at least that is not its purpose IIRCThat's what a few of us started looking at last year, the issue may be the standard f-theta lens from an unmodified unit not working well at the wrong wavelength (at least attenuating). I wondered if they were using a slightly different set up that might bi-pass these issues (for some other reason perhaps as they can afford custom optics no doubt).The other problem facing this idea was that most folks don't want to do from-the-top printing because of the requirement for lots of resin whereas the large surface area of the imagined A4 sized machine made from-the-bottom seem very tricky. What has changed is that someone has verified the concept of floating resin on another liquid and that might be just what is required to make a large format, high speed, high resolution resin based printer possible.Cheers,GrahamOn Tue, Oct 15, 2013 at 1:53 PM, <pzamov@...> wrote:
This is all sales pitch mumbo-jumbo.
The Laser scanning unit in every laser printer contains all of the bullet points that are as a separate description:
LSU has an octagonal mirror spinning at high speed. It detects the start with a built in diode, otherwise your pages printed will look a bit staggered :-D. It has an F-Theta lens so the laser beam can be perpendicular to the photosensitive drum that has the toner attracted to it.
So If we hack a laser unit from a printer and place it on linear slide. and set the home ( page start detect ) - very similar to Alvaro's hack at the start of the group - we should have a top lit 3d printer that has the A4 ( or letter/legal ) whatever format the page is.
The Laser diode is usually an IR diode.
The multi beam/diodes are combined so the power is combined ( There are losses on the mirror/lens F-theta group) so the curing can happen much quicker.
- << Previous post in topic Next post in topic >>