Help request: Impact printer by the digital group

From: Dave Hilton <hilton_at_entelos.com>
Date: Wed Oct 22 19:47:11 2003

Practical Automation was indeed the hardware manufacturer. Lubrication
of the pins is a tricky issue. Supposedly, there is lubricant in the
inked ribbon and, as the pins strike, they are suficiently lubricated.
*ANY* petroleum based lubricant will eventually boil off all the
volotiles, leaving a sticky residue which is as good as glue so far as
the pins are concerned. Not to mention that petroleum based lubes will
rot the rubber rollers.

All that said, I have successfully used projector oil in extremely small
quantities: wash hands, rub 1 drop around the tips of my fingers, hold
finger in front of print head, print all possible characters in one
character space (print - backspace - print -etc etc etc)

The electronics and the software components were all designed and
executed by Dr. Robert Suding (the technical brains behind "the digital
group".

There is a web site "www.ultimatecharger.com" of Suding Associates, Inc.
The writing sure reads like digital group documentation used to read!
He was known to be big in amateur radio and amateur astronomy. You may
be able to radio him - W0LMD.

Have you tried the www.practicalautomation.com web site? Dosen't the
"ATX 38" Kiosk Printer look familiar - even today?


Dave Hilton
Staff System Administrator
entelos(r)
Foster City, CA

"Linux is like a wigwam -
No Gates, no Windows, Apache inside."




-----Original Message-----
From: cctalk-bounces_at_classiccmp.org
[mailto:cctalk-bounces_at_classiccmp.org] On Behalf Of Bryan Blackburn
Sent: Wednesday, October 22, 2003 4:37 PM
To: cctalk_at_classiccmp.org
Subject: Help request: Impact printer by the digital group


Hi all,

I am in the process of restoring a 96 column impact printer sold by the
digital group around 1977. (See my progress at:
http://members.cox.net/oldcomp3/dgp/dgprinter.shtml)

The first question I have is about the print head: Does anyone have any
idea what, if anything, is the proper lubricant for a print head? What
little lubricant I found on the heads felt like it might be a silicone
grease of some kind. I have no idea if this was original lubricant or
not. Labels I have found on other printers warn against oiling the print

head, stating that the heads are lifetime oiled at time of manufacture.

Next, I wonder if anyone on the list might have any information on the
printer itself, which appears to have been manufactured by Practical
Automation Inc., of Shelton Conn., or on the digital group electronics.

Any ideas?

-Bryan
Received on Wed Oct 22 2003 - 19:47:11 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:36:23 BST