On Wed, 10 Aug 2011, Tony Duell wrote:
I
don't know. 20+ years ago, we bought toner intended for them.
I've never
seen such stuff over here :-(
In those days, it was readily available in USA. We bought a "kit" that
I sorted out my CX about 20 years ago, and I never remembr seeing such
refil kits over here/. Perhaps I wasn't looking on the right places
Certainly at
least one of the
corona wires is of the opposite polarity between the printer and
photocopier (that's how you get write-for-black in the printer nad
write-for-white in the copier). I beleiuve the toner powDer is
different,
but I am not sure how,
When you find out the difference, share it with us, and then we will have
correct terminology, rather than "of reversed polarity".
I will see what I can find. I have a rather itneresting book called
'Electrophotography' which covers such electrostatic processes and it may
ahev some clues.
It's dififcult to see why the toner would be very different for the 2
processes. The basic idea from what I rememebr goes like this :
'Fog/ the drum with ligth to discharge it
Charge the drum evenly
Write the image to the drum, discahrging soem bits of it.
Apply chargeed toner. If the toner is charged with the same polarity as
the drum, it'll be repelled from the still-chrged bits of the drum (the
bits that have not received light), and will stick to the discharged
areas.. If the toner has the opposite polarity to the drum, it'll stick
to the still-charged areas
Apply papre with a strongly-charged electrode under it to attract the
toner from the drum to the paper.
Melt the toner into the papepr (fusing)
It;s possible the conductivity of the toner has to be different, I guess,
I can't think what else it would be.
IF any of them happen to turn up, should I flag for
you:
Eiconscript (imitation Postscript and HPLJ emulation, with memory for 286)
JLASER (multiple versions, the "plus" model includes an interface for
Canon scanner mechanism)
Cordata/Corona Data Systems (software, which is probably no longer
anywhere near the board) refuses to run on 286, easy to use YAFIYGI
interface, and support for it (and LJ) by the Poems Font Editor
DC37 ABC switch
Those do all sound fairly interesting. But I don't think I could afford
shipping (and I don't have space for) another CX printer itself.
I was unable to stop the college from dumpstering the LJII (SX), which had
an add-in board for JLASER support, which PROBABLY would have permitted
upgrading most CX external interface to SX. SX had a very noticably
IIRC there were 2 ways to get a CX-VDO interface (or something close to
one) on an SX printer.
The first was a buffer board that fitted in place of the formatter. It
included things like the differnetial driver/receiver for the laser
control and sync signals. This was an officia Canon product I think.
Somewhere I have a scheamtic of it, it's quite simple
The second was a board that fitted in the optional interface slot in an HP
LJ2 and others that used the same formatter). AFAIK, this was a
third-party product, and I have never seen one.
-tony