how to control an inkjet catridge?

Question

Hello,Might someone happen to know a way to control the inkjet cartige withpulse signals instead of the computer?  would like to build a circuit for that purpose.I want to be able to "shoot" ink droplets from all the nozzles at thesame time. I need to know how to operate each of the pizo crystals, andthen to operate them all.I guess I can measure the electrical signal coming from the contactsthat match up with the ones on the cartridge, but always much easier,if someone already has that information... Thanks, Hanan.

Ian Bell · Accepted Answer

You need to know which type of head it is. Some are piezo but many are thick film heaters types (e.g. HP). Some are driven directly and some have a built in serial to parallel register which reduces the number of connections.

Ian

JeffM · Answer

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Sjouke Burry · Answer

The HP inkjet i know of uses no crystals,but a surface mounted resistor.The resistor heats,a steam bubble forms just below a hole,pusing out a drop of ink. That cycle can be repeated several hundred times per second. Because you are using a current pulse big enough to almost blow the resistor , your electronics has to be very accurate and stable.

hananl · Answer

hey,I know than canon and hp heats transisotrs, but i don't want that,, iwant something that doesn't require heat. for that - epson uses apatentthey wrote, using pizo -electric crystlas.

how to control an inkjet catridge?

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