Search found 71 matches

by davidk
Thu May 11, 2017 6:22 am
Forum: 3DP printing
Topic: Hacking the HP45
Replies: 523
Views: 300250

Re: Hacking the HP45

Hi, can you, please, tell more about variable voltage regulator? Why do you need one? Thanks!
by davidk
Sat Apr 22, 2017 7:13 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Well, I made my setup and filled the printhead with water. I managed to build a capping station with a home made cap and a peristaltic pump. I made the arduino software so it sends "1" to each nozzle and fire it 1000 times at 5ms interval. The problem is, the head printed with water with lower and u...
by davidk
Fri Apr 14, 2017 11:05 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Wher can I find a cap for xaar128? I tried on different websites but I find cappings for epson dx5 and other wider heads.
by davidk
Thu Mar 30, 2017 6:05 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Oh I see. Maybe you can find an outdoor or banner printing facility and ask nice if they have a printer with this head and try to test it. First you have to be sure your Xaar is good or faulty.
by davidk
Thu Mar 30, 2017 5:44 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Try to remove ground to any hybrid (5V and HV) chip and you ruin it instantly.
Anyway you shouldn't just apply power without ensuring all inputs are in a certain level - 0V or 5V. And you shouldn't try to fire a dry printhead also. Its protections are for ESD or transient spikes not for miswiring it.
by davidk
Wed Mar 29, 2017 7:08 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Unfortunately the printhead electronics must be very sealed and waterproof to work properly. I think it's potted in resin and you can't open it. Working with TTL signals so close to 35V is very tricky. Maybe a ground went loose at some point and this burnt the interface, or maybe you still have a lo...
by davidk
Wed Mar 29, 2017 6:16 am
Forum: 3DP printing
Topic: Diy inkjet PC software
Replies: 6
Views: 6547

Re: Diy inkjet PC software

Thanks! This isn't quite as intuitive as sending raw data, but it's a very good ideea to start! I'll have a look into it!
by davidk
Tue Mar 28, 2017 5:48 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

What do you mean: contradictory? Can you be more specific? They say it works both with aqueous or solvent inks. Water would be an aqueous ink I guess. EDIT: while I was preparing some dry new sponge-type transparent refiil cartridges, I filled one of them with distilled water and a small amount of i...
by davidk
Mon Mar 27, 2017 3:32 pm
Forum: 3DP printing
Topic: Diy inkjet PC software
Replies: 6
Views: 6547

Diy inkjet PC software

I started to experiment with xaar128 printhead. I wonder, after building my setup, how would I send the bitmap data to the printhead. I'll use an Arduino due to control the printhead because of its large native RAM (96kB). I started to build the arduino firmware and now I need a nethod to transfer t...
by davidk
Thu Mar 23, 2017 6:10 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 287
Views: 131412

Re: Hacking the Xaar 128 printhead

Thank you! I was thinking to print on a piece of glass!