There is a reverse run branch that rob created that allows you to do
negative adaptive feed. This and some hal bits an you can 'jog' through
a gcode program. Don't know if I would ever use this.. but it is kinda
cool Someone had mentioned that another control had this
functionality - that made me want to see if it was possible..
I was using a HB04 wireless pendant - A real encoder with a good
velocity estimation would be a lot better. (I had to do some fiddly
bits to get a velocity from the encoder counts.)