Search found 96 matches

by Wonko
Thu Mar 30, 2017 8:23 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

You probably fried the head. It says several time in the manual that you *must* apply voltages in a predefined order. IIRC it was ~RESET to GND, then 5V, then 35V and then release RESET. You also *must* shut down the chip in the reverse order. If you do it in a different order (and you are describin...
by Wonko
Wed Mar 22, 2017 11:48 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

Sure. Purified water should work. For a test print, get paper that changes color when it gets wet. The Xaar drops are pretty tiny, and you won't see water drops on regular paper. I tested my setup for hours because I thought it wasn't printing. In the end, I tried black ink, only to realize that I w...
by Wonko
Wed Mar 15, 2017 2:49 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

Answers: 1. I have never tried to achieve the firing rates, simply because my transport is too slow. But a fast CPU, preferably suing hardware SPI, is needed 2. I recommend using the Teensy. They are much more powerful in every aspect. 3. Yes, that's where I order them. No complaints. BTW: adapter b...
by Wonko
Tue Mar 14, 2017 9:26 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

Hi Moriarty. I did finish a related project with the Xaar head recently, but I am not in the position to publish the result. Sorry. All that was written here pretty much contains all the information needed to make the head work very easily. It's a fantastic head that is very easy to control, fast, a...
by Wonko
Wed Mar 01, 2017 4:17 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

The pinout is the same for all XJ128 heads, no matter if 80 or 40 pl, wetting or non-wetting. There is no way to determine in software which head is installed.
by Wonko
Sun Feb 19, 2017 11:28 pm
Forum: 3DP printing
Topic: Oasis 3DP printer
Replies: 41
Views: 54424

Re: Oasis 3DP printer

Hmm. SVG, a vector format? Your inkjet cartridges create a 2 dimensional raster of dots, so any image format would probably be more appropriate. There are slicers out there that generate images, GIFs for example (lossless compression in 1 bit or more). And there are a bunch of simple OpenSource read...
by Wonko
Mon Jan 30, 2017 6:42 pm
Forum: 3DP printing
Topic: Oasis 3DP printer
Replies: 41
Views: 54424

Re: Oasis 3DP printer

I love to see this happening! Great job. Maybe you need to use two processors in parallel, one for the head and one for the motion control?
by Wonko
Thu Jan 19, 2017 7:23 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

Maybe he was referring to my link: https://youtu.be/dnBx0aCWNms

I have bought UV Ink, but not tested it - no time. It should work though. The head is capable of using UV ink AFAIK, and there is nothing special required on the software side.
by Wonko
Wed Jan 18, 2017 8:39 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

There is not much science behind it. I just tested around a bit and added a combination of caps. The high power line has 220uF (c3) or something like that. The low power line has 1uF (C1) and 10uF (C2) in parallel, filtering different lengths of pulses. If simply works for me. The diodes simply ensu...
by Wonko
Tue Jan 17, 2017 8:29 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 320
Views: 190267

Re: Hacking the Xaar 128 printhead

The 5V and the 35V GND lines should not be connected anywhere because they are connected inside the print head. One 35V supply must be as precise as possible. It does not require a high amperage, but it should be constant. The second 35V supply should provide higher amps, but doesn't need to be as s...