Homebrew PCBs

Perhaps page counts will pop it at 700 pages as documented with the 
included starter toner cartridge.
I'm good with that number.
Thats a long time for me to make PCBs for hobby radios.

But what reallllly interests me in this PC DATE question is that if I am 
going to bother tearing apart
this printer to make it be a PCB print workstation then the PC I attach 
it to is not going to be anything more than
a dedicated print driver PC...which will be set up to reset its date 
upon booting up.
And the extended range $40 cartride is good for 1,000 pages?
  So I'm thinkning that if we can beat the date problem then page count 
won't be an issue.




On 11/03/2016 10:56 PM, 'Tony Smith' ajsmith1968@... 
[Homebrew_PCBs] wrote:
>
> Like I said, the printer gets the current date from your PC.
>
> If you roll the date back before using the printer then it may not 
> disable the cartridge.  That one time that you forget\u2026
>
> These printers might use a different scheme.  Recording page counts is 
> common so the cartridge will be disabled eventually.
>
> Tony
>
> *From:*Homebrew_PCBs@yahoogroups.com 
> [mailto:Homebrew_PCBs@yahoogroups.com]
> *Sent:* Friday, 4 November 2016 1:15 PM
> *To:* Homebrew_PCBs@yahoogroups.com
> *Subject:* Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct print toner
>
>
>
> So..... WHERE does the printer get the CURRENT DATE from?
> and
> WHAT IF YOUR PC DATE WAS SET TO THE SAME DATE EVERY TIME YOU TURN IT ON?
> WHEN WOULD THE PRINTER DECIDE THE DATE HAS CHANGED?
>
> So the real question here is IF you attach this printer to a PC thats 
> sole purpose is to
> print PCBs forever on this hacked printer then why would you care if 
> you kept the the date
> the same and then every time you were ready to print an image you 
> could also reset that image creation date so nothing about that image 
> attributes would carry into the print driver interogating dates.
>
> On 11/03/2016 08:05 PM, 'Tony Smith' ajsmith1968@... 
> <mailto:ajsmith1968@...> [Homebrew_PCBs] wrote:
>
>     It\u2019s simpler than that.
>
>     No idea of the exact scheme, but it\u2019ll be something like when you
>     put in a new cartridge the printer writes the current date & time
>     (obtained from your PC) to the chips.  When a year has passed it
>     writes \u2018Dead\u2019 to the chip.
>
>     You used to be able to reset chips, now you need to get new ones
>     along with your toner refill after the manufacturers closed that
>     \u2018loophole\u2019.
>
>     Could be worse, HP at one point were writing the manufacture date
>     to the chips so if you inserted a brand new cartridge you\u2019d had
>     sitting in on your shelf for a while, it would report is as \u2018too
>     old\u2019 and kill it.  Nasty.
>
>     Tony
>
>     *From:*Homebrew_PCBs@yahoogroups.com
>     <mailto:Homebrew_PCBs@yahoogroups.com>
>     [mailto:Homebrew_PCBs@yahoogroups.com]
>     *Sent:* Friday, 4 November 2016 8:29 AM
>     *To:* Homebrew_PCBs@yahoogroups.com
>     <mailto:Homebrew_PCBs@yahoogroups.com>
>     *Subject:* Re: [Homebrew_PCBs] Re: Pantum 2500 hack to direct
>     print toner
>
>
>
>     If there is a self destruct after one year then there must be a
>     real time clock of some sort, if it's a clock chip then it should
>     be possible to intercept the clock reference by either changing
>     the clock oscillator Cristal for one that has a frequency of 1/2
>     or 1/4 of the original. If the clock reference is taken from
>     another reference the inserting a device by 2 or 4  IC would do
>     the same. Another option could be to remove the clock backup power
>     source is battery then the clock would always start with its
>     default date/time it just depends on wether the full data time are
>     used or just the day.
>
>     My preference would be to use a slower clock reference signal.
>     When I get my printer (just ordered printer) I will look and see
>     if I can find the if there's clock, it could be in the printer or
>     in the cartridge.
>
>     Anyone got a view to this approach to extending the usable life of
>     a cartridge.
>
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