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FrozenGate by Avery

LPF 3D Printer Project FEELER

S

shokkunlasers

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LPF OPEN SOURCE 3D PRINTER​



I recently thought about building a 3D Printer especially DLP 3D printers.
Now our 445nm diodes are all from DLP projectors with relatively high resolutions and after those diodes are extracted the empty cases with powersupply, optics and DLP chip are worth a few dollars.That makes them a pretty good and cheap source for a DLP 3D Printer


IMO it's good recycling too :P


That's how it could look like.
dlp-3d-printer-self-development-2.jpg



Basically DLP 3D printers cure a liquid with light preferably uv light cause it's high energy so that the image they make gets hard and then lift it up and so build layer by layer.They can do very high resolutions at relatively high speed with all visible or uv light cure able plastics

My idea was to swap one or both phantlights in the projector with UV led's
and then build a housing for it.

The most expensive part of such a printer is the DLP projector that we could get cheap without the diodes and led's from DTR ;)

I know that we have some very talented machinists programmers and electronic engineers here in the forum who could make a working design of such a printer and make parts of the printer.Also there are some detailed DIY instructions on this subject which I linked below :beer:



3ders.org - Work in progress - DLP resin 3D printer | 3D Printing news

Open Source High Resolution 3D DLP Printer | 3D Printer Plans


Now I want to hear what you think about this and if you would join a team to build this! :)
 





Beautiful! Will look forward for all the updates and hope we'll make own very own DIY 3D laser printer. Thanks for this thread SL !
 
Very interesting. I will look into this some more later, but for now I wonder if the cannibalized projectors will be bright enough for this application, and if the missing green and blue (or just green with some projectors) will work.

First thing is to decide on a light source:
The key part in this is quantity of light energy or Dose, a therm that comes from the world of radiology.
The dose is divided in to three vectors as you will, namely photon energy, light intensity and duration of illumination, together giving the total energy dose. Usually in the UV curing of materials the dose is only measured for a specific part of the spectrum. The rest of the light will usually be reflected or absorbed and converted in to heat.
Only photons with a high enough energy will take part in the photo polymerization. This means that the resin that you will be using is the determining factor in the part of the light (electromagnetic) spectrum that we are interested in. Most photo curing resins will cure under the influence of UV light. Light with a wavelength of between 365nm and 420nm.
Some resins also allow for curing with longer wavelengths but these are usually rare and expensive.
Click to expand...

Sounds to me like blue will be needed.
 
Thanks for reading and thinking about it :beer:

For most resins available we definitely we won't need any red or green light (aka blue laser diodes and phosphor wheel) because it wouldn't do anything cure it just warm it up.

Now what I asked myself is if the blue pt-54 or pt-121 phatlights will cure resins
They have quite high output especially the pt-121 which has over 14W optical output power at full current equaling a couple 9mm diodes :drool:
But they also have a wavelenght of around 462nm which is maybe to high for some resins :/

They second way would be to swap those phatlights with cheap 20W or 50W UV leds those may need some sort of modding but will cure most resins pretty fast.
 
I don't think 462nm will cure most resins. IIRC blue laser diodes (~450nm) were tested for this method of printing and didn't work with majority of resins, and gave poor results on the ones they did work with.

If it's simple enough to replace the LED projector carcasses would be very valuable. May have to buy a carcass, to test it out :p
 
Ok I didn't read that :)
That kills the method of leaving the blue led

I'll ask DTR about an empty projector when I have some funds again.

Actually there is one Led that would perfectly fit the job because it has the same size and drive current as the used blue and red leds Invalid Request
The output is also extremly high for an uv led
But the price kills the deal here

Maybe an cheap ebay cluster uv led for 25$ will do the job too :beer:
 
I want to 3d print my own hosts please :D as well as pills and battery sleeves!

:beer:
-Matt
 
There's a photolithographic 3d printer called the Peachy printer that uses a 405nm laser. There website links to another company that specialy designed a resin for them. I'll add the link later.
 
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