message: create driver.default_speed() method
diff: @@ -153,17 +153,18 @@ class SmoothieDriver_3_0_0:
  def speed(self):
  pass
  - def set_speed(self, value='default'):
  + def set_speed(self, value):
  ''' set total axes movement speed in mm/second'''
  + speed = value * SEC_PER_MIN
  + command += GCODES['SET_SPEED'] + str(speed)
  + self._send_command(command)
  + def default_speed(self):
  + ''' set total axes movement speed in mm/second back to default'''
  # 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)
  + # PUSH to save the current speed as default (from robot_config)
  command += ' ' + GCODES['PUSH_SPEED']
  - command += ' ' + GCODES['SET_SPEED'] + str(speed)
  self._send_command(command)
  def set_power(self, settings):
  @@ -289,7 +290,7 @@ class SmoothieDriver_3_0_0:
  if low_power_z:
  self.set_power(prior_power)
  - self.set_speed('default')
  + self.default_speed()
  def home(self, axis=AXES, disabled=DISABLE_AXES):
  