Search found 92 matches

by Wonko
Thu May 19, 2016 8:18 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 518
Views: 299451

Re: Hacking the HP45

If you want to get the pin count down, you could use a CPLD chip like the Altera 3000 to create an SPI interface to control all the pins. SPI can be connected to many CPUs via hardware SPI interfaces or with the Arduino Due even via DMA, reaching 1Mbits per seconds easily, and 8Mbits with some preca...
by Wonko
Wed May 18, 2016 7:49 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 518
Views: 299451

Re: Hacking the HP45

You can save yourself at least four chips. There are source drivers out there with serial input. Simply clock in the first bit, then shift, latch, shift, latch, etc. . This one is 8 bits with also 500mA, but i recall that there are 10, 14 and even 64 bits available. http://ww1.microchip.com/download...
by Wonko
Sun May 15, 2016 8:26 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130994

Re: Hacking the Xaar 128 printhead

The nozzles were clogged from the solvent ink that I was using. I bought an ultrasonic cleaner yesterday which works miracles. I also ordered some UV curing ink from China to try exactly that. Next week's goal will be to mount the head in an XYZ-axis machine so I can print layers. UV ink s perfect f...
by Wonko
Sun May 15, 2016 2:21 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130994

Re: Hacking the Xaar 128 printhead

Funny to see how similar our progress is recently. I managed to get patterns printed and also to test all nozzles. Here is a little video:



https://youtu.be/dnBx0aCWNms
by Wonko
Sun May 15, 2016 2:16 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 518
Views: 299451

Re: Hacking the HP45

Amazing work. Great fun to follow. Keeping fingers crossed for all further findings.
by Wonko
Tue May 10, 2016 9:54 pm
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 518
Views: 299451

Re: Hacking the HP45

That looks absolutely fantastic!
by Wonko
Tue May 10, 2016 9:51 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130994

Re: Hacking the Xaar 128 printhead

Ink just comes through a 3mm hose from a tank that should sit a few cm below the head. It does not seem to be too critical. But for many inks, the printhead should probably be flushed if not used for a while. White UV ink can not remain in the head for more than 8 hours supposedly! One article claim...
by Wonko
Mon May 09, 2016 11:08 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130994

Re: Hacking the Xaar 128 printhead

I have not found anything about conductive ink, neither yes or no, but read several times that "only Epson can do that". I am not sure and I have not tried yet. The setup is pretty fragile. I did try solvent based ink and it worked very well. Ordering some UV curable ink for China right now to creat...
by Wonko
Sat May 07, 2016 6:16 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 130994

Hacking the Xaar 128 printhead

Well, since we all have spent so much time on stupid print heads, I have decided to reverse engineer the protocol of an industrial printhead. Sure, it's 200 Euros for a single head in a single color at only 200 dpi, but these babies are industrial strength, giving them supposedly a much longer life ...
by Wonko
Sun Mar 06, 2016 5:02 pm
Forum: 3DP printing
Topic: Ithaca POSJet 1500
Replies: 11
Views: 15226

Re: Ithaca POSJet 1500

Not bad for Python in general ;-)

No, seriously, great job. Did you make roll own electronics? Or is this with some included interface?