Search found 94 matches

by Wonko
Fri Sep 08, 2017 7:54 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 148208

Re: Hacking the Xaar 128 printhead

Thanks, Simonsigns. It took me month originally to find the documentation on the Xaar 128. Eventually I stumbled over the original docs during a visit to China. By now, with some Google skills, the Xaar XJ128 Guide to Operation is quite easy to find. I know the board that you are talking about. Yes,...
by Wonko
Wed Aug 30, 2017 8:19 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 148208

Re: Hacking the Xaar 128 printhead

The purging procedure helps if the ink is clogged. If you have air trapped anywhere, the head can not build up enough pressure to eject the air. The manual explains how to fill the head the first time, and how to get the air out IIRC. The Xaar 128 is pretty tough compared to the Epson heads that, fr...
by Wonko
Wed Aug 30, 2017 10:25 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 549
Views: 337150

Re: Hacking the HP45

Hey Restani, if you have a working schematic to drive the XAAR 128 can you please share it? I would be really happy! Thanks and have a nice day everyone. There is a Xaar thread in this forum: http://ytec3d.com/forum/viewtopic.php?f=8&t=47&p=1709#p1709 Xaar printheads have all the electronics built-...
by Wonko
Wed Aug 30, 2017 10:21 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 148208

Re: Hacking the Xaar 128 printhead

Make sure that you use a compatible ink and that there is no air bubble in the head. This sounds very much like you have a bubble. You can suck it out of the head using a head cleaner with a vacuum pump. When filling the cartridge, make sure that the hose faces down, then put the ink in with slight ...
by Wonko
Sat Apr 08, 2017 8:43 pm
Forum: 3DP printing
Topic: Using a zcorp printer and modifing it for a different print head
Replies: 5
Views: 6536

Re: Using a zcorp printer and modifing it for a different print head

The software has to be rewritten from scratch. None of the ZCorp stuff will work anymore. I am using a Teensy 3.5. They are fast enough with plenty of resources and they are tolerant to 5V TTL level, which is what the Xaar head and all the motor drivers want. It's amazing to see the entire huge PC m...
by Wonko
Sat Apr 01, 2017 10:19 am
Forum: 3DP printing
Topic: Using a zcorp printer and modifing it for a different print head
Replies: 5
Views: 6536

Re: Using a zcorp printer and modifing it for a different print head

Xaar says in their documentation that their head will last 4 Billion drops (4.0E09). One drop is 80pl (pico liters) or 8.0E-11. 4E9 * 8E-11 = 0.32 liters. 0.32 liters is not very much at all, so either this is a very low estimate, or the 4 billion drops are counted per nozzle. So let's multiply 0.32...
by Wonko
Fri Mar 31, 2017 9:08 pm
Forum: 3DP printing
Topic: Using a zcorp printer and modifing it for a different print head
Replies: 5
Views: 6536

Re: Using a zcorp printer and modifing it for a different print head

My ZCorp machine still has the Canon heads. Impossible to come by, and a super short lifetime. The whole Xaar idea is basically a way to replace the head of this machine eventually. But I got sidetracked, and started to build a much smaller machine, which would be terrific, if I had a few month or s...
by Wonko
Thu Mar 30, 2017 8:40 am
Forum: 3DP printing
Topic: Diy inkjet PC software
Replies: 6
Views: 7134

Re: Diy inkjet PC software

For my controller, I wrote a simple language that includes primitive compression. The host software would write a stream to an SD card, and the controller would read the commands from the same card, controlling the motors and filling the buffers as described. This was my original ad hoc command set,...
by Wonko
Thu Mar 30, 2017 8:23 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 148208

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: 287
Views: 148208

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...