--- In emcoV10lathe@..., Richard Kleinhenz <richk@...>
wrote:
It occurred to me that instead of routing the incoming through the
red rotary switch, if I bypassed that switch and instead put the switch
in series with the power-on low-voltage line to the VFD that might be a
better arrangement. This would use the electric brake when I hit the
switch.
That would work. I suppose for the ultimate in control when threading
up to a shoulder, you could also create a really nice circuit with a
mometary contact, like a jog button. In parallel with the existing
circuit, wire a mometary contact. When depressed, it stays active
until you release it. Releasing a button just before the collision is
much more likely to happen than turning a switch. I hate single phase
motors on lathes for that reason. They only reverse after coming to a
complete stop. Trying to run up to a shoulder, it's easy to get overly
nervous and throw the switch past off and into reverse. At which
point, it continues forward no matter how hard you twist the knob. Not
pretty....
