SoliForum - 3D Printing Community — DLP 3d printers which don't simply use an off-the-shelf projector?

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-27T08:50:54Z

Claghorn wrote:

You can get Texas Instruments DLP controller chips from digikey. What you need in addition to the chip, I have no idea :-).

Well, a board to make it all work together. The dlp chip, dlp controller chip, FPGA chipr for fast data transfer and stuff for HDMI/USB. Not simple to make yourself at all, even if you're an electronic engineer.

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-27T00:24:15Z

redbarret wrote:

Not really, SLA printers like Peachy use a laser beam and two mirrors attached to motors for positioning the single thin beam in the X and Y axis.
DLP printers and projectors use millions of tiny micromirrors in something called a DLP chip or DMD which depending on the angle create raster (bitmap) projections when a light shines on them.
Pretty different in this sense.

Doh! I remembered the moving mirror part and forgot that it is reflecting laser light.

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-26T19:53:59Z

You can get Texas Instruments DLP controller chips from digikey. What you need in addition to the chip, I have no idea :-).

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-26T19:39:41Z

Not really, SLA printers like Peachy use a laser beam and two mirrors attached to motors for positioning the single thin beam in the X and Y axis.

DLP printers and projectors use millions of tiny micromirrors in something called a DLP chip or DMD which depending on the angle create raster (bitmap) projections when a light shines on them.

Pretty different in this sense.

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-26T15:17:38Z

I think the Peachy Printer might be of interest to you though they are still not shipping.

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-25T21:17:56Z

Right, my mistake to not consider removal of UV filters as "modding". Fixed my first post and title. But you kind of missed the point of the thread.

Re: DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-25T20:47:09Z

redbarret wrote:

I think if there were boards for sale for controlling DLP micromirrors directly or boards for modding a video projector to display black and white 1 bit frames instead sold by people who make DLP 3d printers it could really come in handy for this interesting but non-3d printing related project:
http://forum.allaboutcircuits.com/threa … ct.111648/
Are there any?

The issue with the projectors is you can't use them straight for DLP printing off the shelf no matter what electronic mod you do. You also have to remove any all filters between the lamp, the DLP chip, and the lens. Otherwise the UV light will be blocked and filtered. Its not about color or black and white. Its about getting the most UV light possible.

DLP 3d printers which don't simply use an off-the-shelf projector?

2015-05-25T19:43:34Z

I think if there were boards for sale for controlling DLP micromirrors directly or boards for modding a video projector to display black and white 1 bit frames (instead of using an off-the-shelf projector running in 24bit RGB mode with UV filter removed) sold by people who make DLP 3d printers it could really come in handy for this interesting but non-3d printing related project: http://forum.allaboutcircuits.com/threa … ct.111648/

Are there any?

Again, this isn't for a 3d printer but the question is about something possibly used in some 3d printers which doesn't exist anywhere else (at a somewhat affordable price)