Help request: Impact printer by the digital group

From: Bryan Blackburn <oldcomp_at_cox.net>
Date: Thu Oct 23 22:47:22 2003

Thanks to everyone for the comments and suggestions.

>> I've had great luck using liquid graphite lock lubricant. The solvent
>>evaporates and leaves only the graphite. The graphite particles in the
>
> Have you tried 'dry film lubricant' (or at least that's what it's called
> over here, Electrolube (used to?) make it). It's similar, but with fine
> PTFE particles. The carrier evapourates (it's not really a solvent,



I have something very similar, which was made for motorcycle control
cables, called Dri Slide. It is molybdenum disulfide based dry film
lubricant, withstands high pressure and temp. I think I will give that a
try.

>>>If you need to, use tungsten wire for the print
>>>hammer pins themselves. Also replacements would
>>>not rust.
>>
>> If you can't find the right size wire, try piano wire (from a hobby
>>shop) or drill rod (industrial suppliers). Drill rod is annealed (soft) but


For my project, at least, it is a moot point. I have already repaired
the print pin with a pin robbed from another old printer. The most
difficult aspect of the repair was finding a long enough wire of proper
diameter. Brazing the wire to the solenoid was a skill I had to learn
just for this repair, and was not as hard as I had expected. I spent a
lot of time practicing on scrap metal with various heat sources before
repairing the print hammer.

Thanks again for the suggestions.

-Bryan
Received on Thu Oct 23 2003 - 22:47:22 BST