Caveat Emptor, my CNC user experience is rather limited, but I feel
compelled to add my voice here. This issue may become a source of
feature creep. I prefer a system that does what I _need_ it to do in a
predictable, consistent fashion. I hate having to try to compensate for
a system that thinks it knows better about what I want it to do, than I
do. I would like to second Ray's comments about using the jog wheel as a
scalar rather than a vector input. I used it quite a bit for setting up
tooling and work fixtures. For multiple fixtures, it would be common to
jog across a meter or more at several points along the way while needing
to maintain an accurate account of the jog wheel input. Most of my
experience is with a Fadal, which, if I recall correctly, would alarm
and stop if you turned the wheel too quickly. This way you would know
that your jog wheel was out of sync. It only took a couple of alarms to
learn the proper jog wheel etiquette. From a recent discussion though, a
jog wheel with an outer ring for vectoring might be nice, but now that I
think about it, you would have to motorize the jog wheel to keep it in
sync. 

On the other hand, there may be a better way for doing setups than using
the jog wheel.

Kirk
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On Mon, 2007-03-19 at 10:54 -0400, John Kasunich wrote:
> Stuart Stevenson wrote:
> > Gentlemen,
> >   In my limited experience with the handwheel control on this machine I see
> > what I consider over run. I know it is the accumulated pulses the machine
> > has not completed. When the handwheel is turned faster than the machine is
> > able to respond the actual position lags behind the commanded position. 
> 
> At the moment there is a good discussion of this topic going on in the
> emc developers IRC channel (#emc-devel at irc.freenode.net).  You can 
> see the archives here (the discussion starts at about 13:40):



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