message: adds clarifying comment to set_speed()
diff: @@ -155,9 +155,13 @@ class SmoothieDriver_3_0_0:
  def set_speed(self, value='default'):
  ''' set total axes movement speed in mm/second'''
  +
  + # POP will always return speed to the default robot_config speed
  command = GCODES['POP_SPEED']
  if value is not 'default':
  speed = value * SEC_PER_MIN
  +
  + # PUSH to save the current speed (default robot_config speed)
  command += ' ' + GCODES['PUSH_SPEED']
  command += ' ' + GCODES['SET_SPEED'] + str(speed)
  self._send_command(command)
  