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probe: Fix PROBE_CALIBRATE command 

The z_offset calculation should have been calculated from the probe
height to the measured bed position.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-03-08 12:34:13 -05:00
parent eac22df7cb
commit 1b1d3f15d8
1 changed files with 5 additions and 3 deletions
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8
klippy/extras/probe.py
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@ -21,6 +21,7 @@ class PrinterProbe:
self.x_offset = config.getfloat('x_offset', 0.)
self.y_offset = config.getfloat('y_offset', 0.)
self.z_offset = config.getfloat('z_offset')
self.probe_calibrate_z = 0.
# Infer Z position to move to during a probe
if config.has_section('stepper_z'):
zconfig = config.getsection('stepper_z')
@ -147,13 +148,13 @@ class PrinterProbe:
def probe_calibrate_finalize(self, kin_pos):
if kin_pos is None:
return
z_pos = self.z_offset - kin_pos[2]
z_offset = self.probe_calibrate_z - kin_pos[2]
self.gcode.respond_info(
"%s: z_offset: %.3f\n"
"The SAVE_CONFIG command will update the printer config file\n"
"with the above and restart the printer." % (self.name, z_pos))
"with the above and restart the printer." % (self.name, z_offset))
configfile = self.printer.lookup_object('configfile')
configfile.set(self.name, 'z_offset', "%.3f" % (z_pos,))
configfile.set(self.name, 'z_offset', "%.3f" % (z_offset,))
cmd_PROBE_CALIBRATE_help = "Calibrate the probe's z_offset"
def cmd_PROBE_CALIBRATE(self, params):
# Perform initial probe
@ -161,6 +162,7 @@ class PrinterProbe:
# Move away from the bed
toolhead = self.printer.lookup_object('toolhead')
curpos = toolhead.get_position()
self.probe_calibrate_z = curpos[2]
curpos[2] += 5.
self._move(curpos, self.speed)
# Move the nozzle over the probe point