Moveoff demo -- external controls with pvyvcp panel
                moveoff_gui display disabled
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Moveoff_gui options:
(Note: the moveoff_gui is used in the -no_display mode)

  onpause  -- offsets when program paused
  external -- external controls in pyvcp panel

Moveoff component installed and connected using:

  [HAL]HALFILE = LIB:hookup_moveoff.tcl

For additional info:

   man moveoff  ------ moveoff component
   man moveoff_gui --- moveoff sample gui

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Demo usage:
 1) Start linuxcnc using the 7_pyvcp config.
 2) <F1>   (remove ESTOP)
 3) <F2>   (turn on machine)
 4) <HOME> (home all axes)
 5) <R>    (Run the program)
 6) <P>    (Pause the program)
 7) Set halscope to ROLL mode and then enable offsets
    with the Enable Offsets checkbutton.
 8) Change the x,y,z offsets sliders and observe
    on halscope
 9) Uncheck the Enable Offsets checkbutton to remove
    offsets and allow program resumption.
10) Repeat steps 6) thru 9) but alter waypoint
    backtracking with the Enable Backtrack checkbutton.