Search found 35 matches

by aengel
Wed Apr 18, 2018 3:06 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

Here is an image of the BOM for the Xaar Arduino assembly.

I am very concerned about the quality of the power supply. I am also concerned that this Arduino is too slow.
ytec xaar bom.jpg
ytec xaar bom.jpg (109.63 KiB) Viewed 4321 times
by aengel
Mon Apr 16, 2018 4:50 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

About wetting of inks, consider page 33 of The Chemistry of Inkjet Inks, edited by Dr. Magdassi Shlomo. BTW, Dr. Shlomo does excellent research regarding inkjet and conductive inks. I have read a number of his scientific papers, and he and his students are top notch. Snippets of this valuable book c...
by aengel
Sun Apr 15, 2018 12:48 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

I know the board that you are talking about. Yes, it is a great shortcut, but at the same time, it is again a piece of proprietary technology that makes writing driver software harder. Lastly, I have seen the UV curing with LEDs happen, but I cant remember the ink that was used. I know that you nee...
by aengel
Thu Apr 12, 2018 2:15 pm
Forum: 3DP printing
Topic: HACKING an inkjet printer printhead
Replies: 11
Views: 8279

Re: HACKING an inkjet printer printhead

Here is a 50+ page presentation describing the characteristics of most of the commercial inkjet printheads available. The presentation includes some data about uv ink suitability. On pages 44-46 etc. it has lists of comparative data describing Max cP Viscosity, DPI, Drop Volume, etc., all of which a...
by aengel
Wed Apr 11, 2018 4:59 pm
Forum: 3DP printing
Topic: HACKING an inkjet printer printhead
Replies: 11
Views: 8279

Re: HACKING an inkjet printer printhead

I have been pleased with the UV led wafer lamps I have purchased. If I am not mistaken, they emit at 380-vis, which is better; they do not generate ozone; they run on a house mains current (110V nominal in the USA); and they are relatively low cost. I have seen these units with power supplies for le...
by aengel
Tue Apr 10, 2018 10:17 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

Regarding uv curing inkjet compositions for 3d printing with the Xaar 128, Johannes Karl Fink provides some starting formulations. I believe that these are suitable for near-vis curing, 385nm - up. I have tried similar formulations and they work. Some of these formulations have viscosities below 30 ...
by aengel
Tue Apr 10, 2018 12:14 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

Here is an insightful 150 page thesis describing the implementation of a Xaar 128 printhead system. "Development of an Inkjet Printing System on a Flatbed Router" by Dayna Chan. The full text of this thesis is available to the public from the internet servers at the University of Waterloo, Waterloo,...
by aengel
Mon Apr 09, 2018 2:31 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

I wonder what's the minimum setup to drive a single head from the computer. No other sensors, valves or motors. I am working on that now. I started a new thread, "Hacking an Inkjet..." here at Ytec3D. I hope to have a minimum setup for the Seiko 510 printhead posted there in about 2 weeks. We may a...
by aengel
Sun Apr 08, 2018 7:55 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 140718

Re: Hacking the Xaar 128 printhead

Here are examples of circuit boards to drive the Xaar 128 head. Sometimes there are USB variants for these types of circuit boards. I have been unable to find stock cables to connect these circuit boards together. And I have been unable to find the PrintMon shareware to drive the Xaar. The sales age...
by aengel
Fri Apr 06, 2018 7:27 pm
Forum: 3DP printing
Topic: HACKING an inkjet printer printhead
Replies: 11
Views: 8279

Re: HACKING an inkjet printer printhead

The assembly should be suitable for 3D printing using uv resins. These resins have viscosities in the 8-40 cps range. So far we are progressing with our identification of the chips for the ink jet assembly. Here are the simplified diagrams of the schematics. Now we are commissioning the drawing of t...