Archive of the former Yahoo!Groups mailing list: Homebrew PCBs
Subject: motor inside etching chamber
From: Adam Seychell <adam_seychell@...>
Date: 2003-11-24
Hello,
I'm wondering it its possible to seal the shaft from a very low
RPM (< 20 RPM) electric motor (stepper maybe), enough so its
protected from splashes of etchant. Of course a suitable plastic
sleeve will be needed on the metal shaft so no metal is exposed.
A quick google search showed a typical commercial waterproof
motor will use two shaft seals and design to run ten meters under
sea water.
I'm thinking even if etchant doesn't get inside the motor housing
then fumes might, and so could possible corrode the steel.
Any thoughts ?