Moveoff demo

Moveoff_gui options:

  onpause  -- offsets when program paused
  external -- external controls (simulated)

Moveoff component installed and connected using:

  [HAL]HALFILE = LIB:hookup_moveoff.tcl

External controls enabled with connections in:

  [HAL]HALFILE = LIB:moveoff_external.hal

External controls simulated with sim_pin:

  external_enable
  external_backtrack_en
  external_offset_0
  external_offset_1
  external_offset_2

For additional info, see the manpages:

   man sim_pin  ------ utility for setting pins
   man moveoff  ------ moveoff component
   man moveoff_gui --- moveoff sample gui

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Demo usage:
 1) Start linuxcnc using the 2_onpause_external config.
    (set all sim_pin buttons to Toggle mode):
 2) Set halscope to ROLL mode
 3) <F1>   (remove ESTOP)
 4) <F2>   (turn on machine)
 5) <HOME> (home all axes)
 6) <R>    (Run the program)
 7) <P>    (Pause the program)
 8) Enable offsets with the external_enable button
 9) Change the x,y,z offsets (exernal_offset_0,1,2)
    and observe on halscope
10) Remove offsets with the external_enable button
    and allow program resumption.
11) Repeat steps 6) thru 9) but alter waypoint
    backtracking with the external_backtrack_en button.