Refilling the HP 90 series carts (eg HP96 & 97)

Archived from groups: comp.periphs.printers (More info?)

Anyone know how to reset this series of carts?

Archived from groups: comp.periphs.printers (More info?)

"Bill" <bill@c.a> wrote in message news:ivqdnXYPOJsbzBLfRVn-hw@golden.net...
> CWatters wrote:
>
> >Anyone know how to reset this series of carts?
>
> The HP cartridges do not have chips to stop refilling, but they do have
> serial numbers to help prevent a user accidentally re-installing an
> empty cartridge.

Hi Bill,

Yes I think thats true of the earlier HP carts but I'm lead to believe that
the new HP9x carts have more serious protection. I haven't tried rotating
them yet though.

Colin

Archived from groups: comp.periphs.printers (More info?)

Bob Headrick wrote:

>>>Anyone know how to reset this series of carts?
>>
>> The HP cartridges do not have chips to stop refilling, but they do have
>> serial numbers to help prevent a user accidentally re-installing an
>> empty cartridge.
>>
>> I'm not sure of the exact number, but if you have 3 or 4 cartridges, you
>> can rotate them through the printer. The printer reads the serial number
>> on the cartridge, but it only stores 3 or 4 of them at a time. When you
>> get back to the first one, the printer thinks it's a new cartridge
>> again.
>
>This is not true for the 96/97 cartridges. There is nothing to prevent
>refilling, but there is not way to reset the ink level to full. Once the
>cartridge is depleted the ink level will show as empty in the original printer
>or "not available" if put in another printer.

Hi Bob...I didn't realize the 9x series did that. I thought just
rotating them would clear the memory in the printer like the other
series.

So then the 9x series has a "chip" of sorts that remembers the status of
the ink volume or number of droplets dispensed? Can you give us details
of how this works or is it a trade secret?