Search found 69 matches

by davidk
Thu Aug 08, 2019 6:24 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

I use a cheap 3A booster from ebay. It seems it's stable enough. It's not quite rocket science. For me the hardest part was to build the mechanical capping. It works good now, I use the same printhead since february and it have all nozzles firing ok.
by davidk
Tue Aug 06, 2019 6:04 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

Hi, It's normal to uave a short between GND's. I have a full working set I build and I have a single 24V supply. 24 goes to motor drivers, to a 7805 stabilizer and to a booster for head voltage. Don't use 36V, I use only 29...30V instead of 35. In fact, adjust the voltage according to the ink viscos...
by davidk
Mon May 27, 2019 4:57 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

First damper had some leak but as long as tbe head was softly wiped printed ok.
by davidk
Sat May 25, 2019 5:09 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

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.
by davidk
Fri May 24, 2019 3:59 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

I really have no ideea and they don't explain this in datasheet. I understand from datasheet that the non wetting models are harder to care because of the nozzle plate coating. They can't be wiped in fact you can never touch the nozzle plate because the coating will be damaged.
by davidk
Tue May 21, 2019 9:33 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

Hi, This is my setup. You can see the damper above the head, the capping station I built (with a silicone band gasket and peristaltic pump), the reservoir and of course a print sample. The sample print is 8 times overprint microweaved. My head has a full blocked nozzle and many nozzles are deflectin...
by davidk
Mon May 06, 2019 7:07 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

I know. I made the same mistakes and assumptions and lost two printheads by running water and aqueous ink. The irony is for me solvent ink was exactly what I needed. And it never clogs...
by davidk
Tue Apr 30, 2019 11:57 am
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

I use INX TRIANGLE MLD solvent inks. They dry slow so no risk of nozzle clogging. For capping you can make your own gasket from silicone rubber. My ink won't react with sillicones
by davidk
Wed Feb 27, 2019 7:28 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

Hi Dragonator, The speed can be much higher. However if I print fast and with much ink (all nozzles at once) the head starves. I suppose it's because my heads are scrapped and probably the internal filter are clogged. So, as I can't feed ink properly I'll print slow. And if I run slow there's no ris...
by davidk
Tue Feb 26, 2019 2:18 pm
Forum: 3DP printing
Topic: Hacking the Xaar 128 printhead
Replies: 280
Views: 126576

Re: Hacking the Xaar 128 printhead

Hi, This is my project. For now I don't have the Y axis, so I can print only one pass. I use Triangle INX "MLD Magenta" ink. The capping is milled for this project and as sealant I use gasket RTV as in pictures. It seems it doesn't dissolve in ink or solvent. The ink tube is also silicone. For now, ...