Re: [CAD_CAM_EDM_DRO] HP 7475A

Just looked up the cable requirements for HP Plotters serial connection as
shown in the AutoCad 10 manual. I use this on my 7585 E plotter.

plotter end to computer end ( both DB-25 connectors) Is different for the 9
pin serial connector.
2-----------------3
3-----------------2
7-----------------7

on the plotter end connect
4 to 5
6 to 20

On the computer end connect
4 to 5
6 to 20

On the 7475 set the switches
B1 0
B2 1
B3 0
B4 1
S1 1
S2 0
D-Y to D (7470 & 7475 only)

set computer comm settings to 9600, 7 data bits 1 stop bit even parity

You should be able to copy a HP plot file to the plotter.

I have been able to use Hyperterm in Win 9X to type and send commands to the
plotter.

I believe that the HP web site has a slightly different cable pin out for
using HP plotters and system devices.
Hugh

----- Original Message -----
From: "eggpoodle" <eggpoodle@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, May 05, 2002 9:17 AM
Subject: [CAD_CAM_EDM_DRO] HP 7475A


> I am new to this group, and have interest in making a CNC for use in
> architectural model making and possibly wood work (canoes, curved
> things)
>
> I have access to about 9 Hewlett Packard 7475A pen plotters (11X17"
> capacity, 6 or so pens). Are these units useful for making a small
> machinge, perhaps using a dremel or similar for cutter?, or are the
> motors too light duty for the job?
>
> Also, any idea what a fair price is for them if working? (they are
> pre-1990, and use an off-base serial connector)
>
> I'll watch this thread, and can be directly emailed at hdesign@...
>
>
>
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