Resin based 3D printers (SLA) are the next big thing, and while they may seem daunting at first, in some ways they are actually simpler than FDM machines with less moving parts! Loosely following an Instructable, [Dan Beaven] has just finished putting together his own home-made 3D DLP Printer, and it’s bloody brilliant.
He owes a lot of thanks to [Tristram Budel] and his incredibly detailed Instructables guide on building a 3D DLP printer, but [Dan] has also added quite a bit of his own flair to the build. Most notably is his method of separating layers from the vat of resin — most designs tilt the bed slightly to counter the suction forces, but his slides the vat back and forth along the Y-axis, which seems to work extremely well.
The printer is built out of 1″ T-slot aluminum and has a NEMA 17 motor that provides the Y-axis movement along two linear rods for the vat. The Z-axis stage uses a NEMA 23 motor and has a whopping 14″ of travel. Combined with a 104mm x 204mm build plate, this thing can print some decently sized parts!
To cure the resin, he’s using a 1080p DLP projector with no modifications. To conserve space, it is mounted at a 90 degree angle, and uses a small mirror to reflect the image onto the build plate inside of the vat. To pump the resin in and out of the vat, he’s using an industrial peristaltic pump he bought off eBay — a word to the wise, it needs to be flushed with isopropyl alcohol after each use! He learned the hard way…
For more info on printing in resin, don’t forget to check out our column on 3D Printering: You Want UV Resin?