Search found 77 matches
- Fri Aug 11, 2017 3:10 pm
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Hi, I finally managed to fire this cartridge with my L6452 driver that I wrote above. The missing horizontal lines aren't clogged nozzles but a short on address 21/22 that I'll repair later. If I will redesign the PCB, I will rearrange primitive outputs. Since odd and even ones are on different rows...
- Thu Jul 06, 2017 4:34 pm
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Of course. This is a 50-50% hobby-professional project and I don't have much time, otherwise it would have been finished. But I can share it here so I'll let you know about my conclusions.
- Thu Jul 06, 2017 11:15 am
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Hi math,
I posted a few posts ago the schematic. The only mistake is the 19V output of LT1930 should go to VStepUp and Vr to 12V. If you read the schematic you'll understand. I made a simple firmware to test the pins output, no real test with a cartridge yet.
I posted a few posts ago the schematic. The only mistake is the 19V output of LT1930 should go to VStepUp and Vr to 12V. If you read the schematic you'll understand. I made a simple firmware to test the pins output, no real test with a cartridge yet.
- Fri Jun 30, 2017 4:38 am
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Hi,
I started testing my design using ST L6452 with the schematic I show few post ago. Good news, the LT1930 outputs 19V for Vboost and all voltages are correct. The air is clear, no smoke released . So I can start coding the ATMEGA64.
I started testing my design using ST L6452 with the schematic I show few post ago. Good news, the LT1930 outputs 19V for Vboost and all voltages are correct. The air is clear, no smoke released . So I can start coding the ATMEGA64.
- Tue May 30, 2017 8:33 am
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Thank you, David, for your posts here. You determined us to research into using this ST chip and I appreciate this. Your advices are very appreciated.
- Sun May 28, 2017 5:32 pm
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Regarding L6452, I will tie ADCK and ONENABLE to 5V and CONVSTART, CRDATA, CRLOCK and CRLATCH to GND. ADCK should be tied to VCC because it's active on falling edge. I don't think it's important but I don't need the ADC control logic to be in any kind of initialising anything. Still, we would apprec...
- Sat May 27, 2017 9:49 am
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Thanks. You're right, inputs should ALWAYS be tied to a certain level.
Did you use its internal ADC?
Did you use its internal ADC?
- Fri May 26, 2017 6:51 am
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
Hi all, I've attached my driver design. I still have some work to do on the schematic but i'm close to my final design though. Since I don't know how to use the internal stepup part of the L6452, I used LT1930 for VstepUP. It's enough for the low current input of the L6452. I found it difficult to m...
- Mon May 22, 2017 6:17 pm
- Forum: 3DP printing
- Topic: Hacking the Xaar 128 printhead
- Replies: 365
- Views: 1319763
Re: Hacking the Xaar 128 printhead
After playing with Xaar128-80, I reached some conclusions. There are several advantages and disadvantages compared to thermal printheads. Despite the myth that piezo printhead runs on a very wide range of fluind compared with a TIJ head, it won't run on water. I received an answer from the Xaar (man...
- Mon May 22, 2017 1:20 pm
- Forum: 3DP printing
- Topic: Hacking the HP45
- Replies: 751
- Views: 2897875
Re: Hacking the HP45
David, how do you address 22 addr lines? You use both channels A and B and switch between channels to drive all nozzles? The switch is fast enough?
We'd all appreciate if you show how you connected the IC to the printhead.
We'd all appreciate if you show how you connected the IC to the printhead.