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Added new 'P' (precise probing) option to G28

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* This new flag causes G28 to execute the same probing algorithm that is
  used when bed leveling in order to increase accuracy. Provides a good
  alternative to 'bump' probing for probes that are still intermittently
  innacurate (I recommend disabling HOMING_BUMP_MM for the Z axis when
  using this option exclusively).
* Only avaialbe when 'HAS_BED_PROBE' is enabled and is configurable via
  all the same options as the bed level probe.
This commit is contained in:
Nick Weedon 2024-11-09 16:37:41 -05:00
parent 13af4e1ef1
commit c252098459
1 changed files with 12 additions and 0 deletions
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12
Marlin/src/gcode/calibrate/G28.cpp
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@ -530,6 +530,18 @@ void GcodeSuite::G28() {
#endif // DUAL_X_CARRIAGE
#if HAS_BED_PROBE
// Perform precise homing using the same probing procedure as bed leveling
if (parser.seen_test('P')) {
xy_pos_t xyPos = { current_position.x, current_position.y };
float probedZHeight = probe.probe_at_point(xyPos, PROBE_PT_RAISE, 0, false);
DEBUG_ECHOLNPGM("Probed ZHeight (correction amount): ", probedZHeight);
current_position.z -= probedZHeight;
sync_plan_position();
}
#endif
endstops.not_homing();
// Clear endstop state for polled stallGuard endstops