Fwd: DLP based printer

[Bryan Bishop]

From: Peter <peter.b.h...@gmail.com>
Date: Wed, May 23, 2012 at 10:15 AM
Subject: DLP based printer
To: bay-are...@googlegroups.com


I am interested in making a DLP-based printer, if you are also interested perhaps we can collaborate.  

If you are NOT interested in making one but interested in trolling, arguing, ranting, etc. please do that on another thread.  

What is the correct terminology for this type of printer?  SLR, SLD?  What does that mean?

I did a little bit of time researching the open source projects and I think they are all incomplete.  

Starting here: http://www.thingiverse.com/thing:19185

That thing does not show any actual prints, I do not think they got it working yet.  

Lemon Curry has some nice documentation but is far from being a how-to guide, and I question if anyone there has actual printed anything.  Great work on both of these! 

This is the most complete version I have seen to date:

http://3dlprint.com/

There are of course the $2000+ crowdfunded DLP printers (Veloso and B9Creator) which despite their high price actually work.  The goal then is to build a working DLP-based printer and share whatever we can with the community.  

Does anyone know of a wiki we can edit for this type of printer, perhaps Reprap?  

I think to build one the following components need to be procured and assembled, this is my list for now: 

1. structural frame 

2. Z-stage dipping mechanism (this looks great:  http://www.thingiverse.com/thing:21204)

3. vat: soda glass and aquarium silicone 

4. Electronics: 

   -Ardunio Uno

   -Stepper motor

   -Stepper driver

   -12V power supply (wall wart)

   -misc electronics (linear regulator to take 12V down to 9V for Uno) 

5. DLP projector 

6. computer to drive projector and communicate with Uno

There seems to be a problem with the resin hardening on the bottom side of the print and sticking to the vat.  The crowdfunded printers have another motor that moves the vat at every layer.  Some people were trying to fix this by applying a non-stick material on the bottom of the vat.  The above list may need to be updated with a second motor (B9Creator uses a DC motor) and some mechanism to move the vat, however the Arduino Uno would still be adequate in terms of IOs.  

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- Bryan
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