Search found 92 matches

by Wonko
Tue Oct 02, 2018 10:23 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130987

Re: Hacking the Xaar 128 printhead

I suggest something more fun: publish what you know about those heads here for everyone to read, and I will see what I can do to make schematics and code, which will likely be improved by others on this list, giving you the best starting point possible: peer reviewed code.
by Wonko
Sun Sep 09, 2018 7:38 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 148
Views: 30053

Re: Hacking cartridge HP 84/85

@dragonator, you are right. It is just a head with a matching tank. That is promising. I would still highly recommend to use, find, borrow and analogue scope and at least look at each signal once. If they end up all being digital, then that is a nice confirmation. If not, it may save hours and days ...
by Wonko
Sun Sep 09, 2018 6:58 am
Forum: 3DP printing
Topic: Oasis 3DP printer
Replies: 41
Views: 35412

Re: Oasis 3DP printer

Extruded aluminium Oasis looks great! Very nice. Congratulations! The Iota version you checked out is already a few days old and optimized for colored FDM printing which needs this "overhang" to read the correct colors. This can of course be switched off. Maybe you can send me the STL and I can see ...
by Wonko
Sat Sep 08, 2018 5:30 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 148
Views: 30053

Re: Hacking cartridge HP 84/85

I would recommend that you look at all the signals with an analog scope as well why do you think that this can be analog? Because it is unlikely that throw-away cartridges have a processor on them that manages drop size in relation to head temperature and many other little nasty issues with thermal...
by Wonko
Wed Sep 05, 2018 10:58 pm
Forum: FDM printing
Topic: Project Tesseract
Replies: 11
Views: 15003

Re: Project Tesseract

by Wonko
Wed Sep 05, 2018 10:54 pm
Forum: 3DP printing
Topic: Oasis 3DP printer
Replies: 41
Views: 35412

Re: Oasis 3DP printer

I have put my color voxel slicer software up into the OpenSource at github. The slicer can generate output from meshes with texture maps for all kinds of 3D printers, including powder/binder machines. Since it is OpenSource, it's easy to add a module that outputs command sequences that the Oasis con...
by Wonko
Wed Sep 05, 2018 10:48 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130987

Re: Hacking the Xaar 128 printhead

Just make sure the code does exactly what the drawing says: Keep RESET low, the apply 5V, then apply the high voltage, then set REST to high. Make sure you use at least the time given in the diagram between these cycles. Also, remember that mechanical relays have a long delay from being pulled until...
by Wonko
Wed Sep 05, 2018 10:41 pm
Forum: 3DP printing
Topic: Hacking cartridge HP 84/85
Replies: 148
Views: 30053

Re: Hacking cartridge HP 84/85

I would recommend that you look at all the signals with an analog scope as well. What looks like neat square waves in a logic analyzer may actually be a quite complex analog signal. It is actually rather unlikely that the ink cartridges use MCU level digital inputs. Those are throw-away cartridges. ...
by Wonko
Thu Aug 02, 2018 8:30 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130987

Re: Hacking the Xaar 128 printhead

1: you get a tank that can hold the ink and is vented, then you add a hose that runs to the Xaar input port. Position the tanke a few cm above the head to prime it, then lower the tank with the ink level a few cm below the head. It will pump the ink up when running correctly. Make sure you use Xaar ...
by Wonko
Thu Apr 05, 2018 7:55 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130987

Re: Hacking the Xaar 128 printhead

The clocks don't need to be synchronized. They can have completely different frequencies. The data clock can have up to two MHz. It's all in the manual: XJ128 Guide to Operation, Xaar Document no: D031010302 Version A, Page 33. Just make sure that you stay within the limits and verify all assumption...