Hi,
the issue is that often when you want to either feed hold or stop a program you are doing it in a panic.
In a genuine panic either stop or Estop is appropriate, who cares if you lose reference?.
Under most circumstances feed hold is adequate, with the ESS at worst, when in default condition, is 180ms
between <FeedHold> and motion stopping, as I say adequate. I just don't want to scramble with the mouse or
even hit a touch screen. One or more physical buttons around the machine seems like a worthy addition to me.
Craig