On Fri, 9 Oct 2009 15:00:10 +0100, AdeV
wrote:

Recently, I bought a 24" digital scale from Chronos, which I fitted to
the Z axis of my machine. It looks very similar to this one, only
longer:

http://www.chronos.ltd.uk/acatalog/info_SGU___.html


I'm somewhat annoyed to discover it has a 0.004" error in every 0.100"
of travel! Is this normal for this kind of scale, or have I got a duff
one?

Could this be a machine with metric lead screws and fudged imperial
dials?

A large fixed percentage error would be difficult to achieve given the
way they are made inside.