HP 7475A Plotter

From: Frank McConnell <fmc_at_reanimators.org>
Date: Mon Mar 8 12:11:29 1999

Allen Rose, writing as "Mindy Fuchs" <tomeditf_at_worldnet.att.net> wrote:
> Last year you sent out a request for info about HP7475A Plotter
> pens. Like you, I am now trying to get one working. DId you find a
> source for pens? Also, do you have any idea where I can get a
> plotter manual? Even xerox copies of the important pages would
> help. ALso, any idea what cable is required. Thanks.

As other folks have written, the pens come up on ebay sometimes.
They might be OK -- HP sold them with expiration dates and I don't
really know how well they keep, although (a) back in the 1980s we
didn't pay much mind to the expiration date on the package and had
no cause to regret it and (b) a friend who has purchased pens via
ebay has said that at least some of them were OK.

The pens do dry out if left in the plotter though, even if they are
capped by the plotter or the pen carousel. I would not expect pens to
work unless they are in sealed packages.

HP no longer sells pens. Last time I looked their web site referred
users to Koh-i-noor for pens and ink, and I think I managed to work out
that Koh-i-noor had refillable ink pens as well as new felt-tip pens.

The 7475A is tricky and you may need more than pinouts for its port,
because if it's an RS-232 flavor, the DIP switches let you tell it
whether to behave like a terminal device or as an eavesdropper on an
existing terminal device's connection. To use it from a PC based
application you probably want the former; the latter is useful for
host-based graphics applications that are accessed from a terminal
but know of the existence of the eavesdropping plotter.

-Frank McConnell
Received on Mon Mar 08 1999 - 12:11:29 GMT