if it is really off by 1/2 inch per foot, it would be easy to prove this -
put a piece of scrap on your machine and make a cut at 000, then go 12
inches and make another cut and then use a ruler to measure - if it isn't
off by about 1/2 an inch, the error is elsewhere.
"David Billington" wrote in message
...
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?



What machine is it you've fitted it too and how have you determined the
scale is at fault rather than the machine.