Hacking the Xaar 128 printhead

Powder and inkjet printing
maxt
Posts: 15
Joined: Fri Apr 26, 2019 10:38 am

Re: Hacking the Xaar 128 printhead

Post by maxt » Sat May 25, 2019 4:52 pm

Hi guys, how do you raise the 3.3V levels of the teensy signals to the 5V that the XAAR expects ?
thanks in advance
Massimo

davidk
Posts: 67
Joined: Sun Mar 12, 2017 6:48 pm

Re: Hacking the Xaar 128 printhead

Post by davidk » Sat May 25, 2019 5:09 pm

I use a 74HCT574 powered at 5v. Its inputs can be driven at 3V3 and because it is powered at 5V it will output 5V. It's not the most correct way but for me works very well.

Braden
Posts: 5
Joined: Sun Aug 12, 2018 5:42 pm

Re: Hacking the Xaar 128 printhead

Post by Braden » Sun May 26, 2019 6:49 pm

Thanks for the help davidk. So your main ink reservoir is just open to atmospheric pressure and the ink is gravity fed to the ink damper? Did you have any trouble controlling the flow of ink so that your prints wouldn't be saturated? And maxt, I have just been using an Arduino Mega which can output 5V.

davidk
Posts: 67
Joined: Sun Mar 12, 2017 6:48 pm

Re: Hacking the Xaar 128 printhead

Post by davidk » Mon May 27, 2019 4:57 am

First damper had some leak but as long as tbe head was softly wiped printed ok.

maxt
Posts: 15
Joined: Fri Apr 26, 2019 10:38 am

Re: Hacking the Xaar 128 printhead

Post by maxt » Sat Jun 01, 2019 1:49 pm

Braden wrote:
Sun May 26, 2019 6:49 pm
And maxt, I have just been using an Arduino Mega which can output 5V.
I Branden, thanks, I know about arduino, however if I do this it has be a full color printer. I.e. 5 heads. I rule out arduino cause I doubt it would be able to drive and synch all of these heads. Some recent teensy (3.3V) should be ok, if they have enough pins.

Wonko
Posts: 85
Joined: Sat Aug 15, 2015 8:13 pm

Re: Hacking the Xaar 128 printhead

Post by Wonko » Tue Jun 04, 2019 1:36 pm

Teensy have enough pins. If you need more, Arduino Due are an option (ARM CPU). Xaar heads use a serial protocol and can be daisy-chained. If you can be fast enough, you can control as many heads as you wish with the same control pins.

Post Reply