Re: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's

Not with the servo's as such and it's some time ago that I used the
7475 plotter among others, so I can't remember which one it is.

So here goes with some general info on HP Plotters.

Normally Serial Comm.'s but could also have a parallel port fitted.

Dip switches will need to be set for correct comm's protocol and speed.
(quite often hidden in the machine)

Correct driver software for that specific plotter (HP site may still list
it)
as HP had the habit of different drivers for different plotters rather than
a standard driver. I use a HP9000 series plotter but modern XP drivers
will not give me pen selection, it just picks up the first available in the
pen turret.

Finally you will need to define the plotter in the computer set up and
possibly in the application.

I know when I retired I had some HP Plotter manuals and I think
the 7475 was among them, I can have a search if it will help but it will
not be a quick job.
(one who never throws anything away).

Dave M.

----- Original Message -----
From: "Victor A. Estes" <emc3zach@...>
Subject: [CAD_CAM_EDM_DRO] Hp 7475 Plotter Servo's


> Has anybody had any experience with HP's 7475 Plotter servo's. I have an
> old hp 7475 plotter that seems to work (demo prints) but has a
> communication problem with my computer. Was wondering if any one has used
> these servo's in other projects? I.E. hooked them up to a servo controller
> and ran them off of another program such as EMC or one of the others? If
> I can't get the plotter to talk to the computer I would like to salvage
> the servo's and use as something else. The plotter has a constant
> blinking error light that will not reset, and does not seem to be
> communicating with the computer. I hooked up a new serial null modem
> cable, but still am unable to get the plotter to respond to the computer
> commands through DOS and the COM1 port.
>
> I was thinking of maybe using the servo's in an egg decorating machine. I
> saw one on a CNC art web site.
>
> I know the servo's work because from the control panel I can make the
> plotter pick up pens and also do the demo plot.
>
> Any Suggestions?
>
> Victor



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