Thanks for the link, so the speed is determined by presenting fresh etchant continuously. Any thoughts on what affects the undercutting?
--- On Fri, 8/14/09, DJ Delorie <dj@...> wrote:
From: DJ Delorie <dj@...>
Subject: Re: [Homebrew_PCBs] instructables 1 min PC etch using sponge & FeCl
To: Homebrew_PCBs@yahoogroups.com
Date: Friday, August 14, 2009, 6:10 PM
Malcolm Parker-Lisberg <mparkerlisberg@ yahoo.com> writes:
> Has anyone tried this method for chemical machining. I am making
> some encoder disks for the digital DC servos I am building and was
> going to use conventional dip FeCl bath. Is the undercutting any
> less?
http://www.delorie com/pcb/brass/
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