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probe: Refactor z lift code to its own function. 

Call lift-z prior to the first move.  This prevents the nozzle from hitting the build surface in situations that home the nozzle off and below the bed.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>
This commit is contained in:
Arksine 2018-08-25 10:55:12 -04:00 committed by Kevin O'Connor
parent 4acda88e8d
commit 1588426229
1 changed files with 11 additions and 7 deletions
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18
klippy/extras/probe.py
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@ -180,6 +180,15 @@ class ProbePointsHelper:
return self.probe.last_home_position()
else:
return None
def lift_z(self, z_pos):
# Lift toolhead
curpos = self.toolhead.get_position()
curpos[2] = z_pos
try:
self.toolhead.move(curpos, self.lift_speed)
except homing.EndstopError as e:
self.finalize(False)
raise self.gcode.error(str(e))
def start_probe(self):
# Begin probing
self.toolhead = self.printer.lookup_object('toolhead')
@ -191,6 +200,7 @@ class ProbePointsHelper:
'NEXT', self.cmd_NEXT, desc=self.cmd_NEXT_help)
self.results = []
self.busy = True
self.lift_z(self.horizontal_move_z)
self.move_next()
if self.probe is not None:
try:
@ -218,13 +228,7 @@ class ProbePointsHelper:
self.toolhead.wait_moves()
self.results.append(self.callback.get_probed_position())
# Lift toolhead
curpos = self.toolhead.get_position()
curpos[2] = self.horizontal_move_z
try:
self.toolhead.move(curpos, self.lift_speed)
except homing.EndstopError as e:
self.finalize(False)
raise self.gcode.error(str(e))
self.lift_z(self.horizontal_move_z)
# Move to next position
if len(self.results) == len(self.probe_points):
self.toolhead.get_last_move_time()