[BUG] [Bedleveling] Z dont rise on deploy with fixed probe and homed to max

[KillerInk]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

Hi
My setup on Z have max endstop and on min side an inductive sensor as FIX_MOUNTED_PROBE.
It homes to max side because its on bottom. No good idea to home to min after a print is done^^
After a G28 and everything is homed, i do a G29 to start the bedleveling.

`

G29 X0.00 Y0.00 Z122.00
Machine Type: Cartesian
Probe: FIX_MOUNTED_PROBE
Probe Offset X0.00 Y-80.00 Z0.00 (Middle-Front & Same Z as Nozzle)
Auto Bed Leveling: BILINEAR (disabled)
remember_feedrate_scaling_off: fr=66.67 100%
set_bed_leveling_enabled X0.00 Y0.00 Z122.00
<<< set_bed_leveling_enabled X0.00 Y0.00 Z122.00
current_position= X0.00 Y0.00 Z122.00 : Probe::set_deployed
deploy=1 no_return=0
Raise Z to 10.00
do_z_clearance(10.00 [122.00 to 10.00], 0)
`

at that point the bed should start to rise, but it do not^^

after looking through the code i ended up here

Marlin/Marlin/src/module/probe.cpp

Lines 526 to 530 in 4eb8a87

	if (z_raise_wanted) {
	const float zdest = DIFF_TERN(HAS_HOTEND_OFFSET, Z_CLEARANCE_DEPLOY_PROBE, hotend_offset[active_extruder].z);
	if (DEBUGGING(LEVELING)) DEBUG_ECHOLNPGM("Raise Z to ", zdest);
	do_z_clearance(zdest);
	}

wich brought me there

Marlin/Marlin/src/module/motion.cpp

Line 1298 in 4eb8a87

if ((!lower_allowed && zdest < current_position.z) || zdest == current_position.z) return;

so we start at 122 and the bed should go to 10. but lower_allowed is by default false it returns silent and z never rise.

changing the code inside the probe line 529 to
do_z_clearance(zdest,true,true);
rises Z finaly.

its equal if i use Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN or Z_MIN_PROBE_PIN, acts both the same.
also that affects every auto bedleveling

due the fact that i have no idea, if that is the correct way, nor how that affects other probes, i opend that issue and not a pull request.

if you wonder why the slow probs triggered, it hit the max endstops^^

happy new year and thx for marlin. it never went boring with it^^

marlin_probe log.txt
Configurations.zip

Bug Timeline

I dont know

Expected behavior

No response

Actual behavior

No response

Steps to Reproduce

No response

Version of Marlin Firmware

latest bugfix-2.1.x

Printer model

be3D DeeGreen(only orginal are the axis and the case)

Electronics

mks tinybee tmc2209-standalone

LCD/Controller

no lcd

Other add-ons

No response

Bed Leveling

ABL Bilinear mesh

Your Slicer

None

Host Software

Pronterface

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

No response

[Danez-DK]

I can confirm this is a problem with anycubic kossel plus (Marlin-2.1.3-b1) using BD Sensor.