[Feature Request] SCREWS_TILT_CALCULATE turn knob until probe triggers

Features
1

Hi everyone,

It would be so nice if SCREWS_TILT_CALCULATE has an option to:

  1. Home all axis.

  2. Measure the height above each manual bed tilt screw.

  3. Move the print head to the first manual bed tilt screw that require adjustment. (lower or higher than Z0)

     3a. If lower than Z0 
     Move print head to (Z0 + Z offset) ask the user to turn the knob until the probe triggers.

 3b. If higher than Z0
     Move print head down until the probe triggers and move it up again and repeat.
     Stop moving up and down if the probe doesn't trigger anymore before (Z0 + Z offset). 
     Ask the user to lower the bed corner until moving up and down stops.
     When moving up and down stopped, go into the 3a routine.

  4. Repeat this process for every manual bed tilt screw that require adjustment.

Marlin has this feature (LEVEL_CORNERS_USE_PROBE) for a while now and it saves quite some time on corner leveling.

Check this Youtube video to see it in action:

Can this feature be added to Klipper too please?

I am not a coder but I’m happy to help testing :blush:

Kind regards,

Marknga

2 Likes
2

I second this request! That would be very very handy indeed :pray:

2 Likes
3

Here’s a temporary macro that may work until this feature is added. This is just a macro for 1 screw, so you’ll need to add multiple of these for each screw and change it accordingly.
It will:

  1. Home all axis
  2. Bring probe above screw, at a Z height of 10
  3. Deploy probe
  4. Move down to a Z height of 3.8
    At that point you should be able to tram your bed, and the light on the BLtouch will turn red when in a ‘triggered’ state, and have no light when not triggered.
    (Remember to change the coordinates to your own screw coordinates and make sure Z height for tramming is okay).

Because the goal is only to tram the bed, or to make it ‘level’, then the actual Z height doesn’t need to equal your actual probe Z-offset. I used 3.8 because it is just above my Z-offset, allowing me to tram with minimal adjustments.

[gcode_macro BedScrew1]
description: bed screw tram using BLtouch
gcode:
		G28
    G1 X75 Y43 Z10 F5000.0 		# Move 10mm above screw1 to allow probe to deploy
    BLTOUCH_DEBUG COMMAND=touch_mode
    BLTOUCH_DEBUG COMMAND=pin_down    #Deploy the BLtouch probe
    G1 Z3.8    #Move down to a Z height just above the probe 'trigger' point
4

do you think you could modify this for other probes?

5

Possibly, what probe do you have in mind? This macro uses the light on the BLtouch to let you know when it is triggered or untriggered. Depending on which probe it is, it might be better to make a new macro entirely that would use data from the probe to tell you when it is triggered or not.
Let me know what probe you have and I’ll see if I can modify this code.

6

If it’s light based then that might be an issue. Cus only inductive probes have lights on them other than the supported one. I have a inductive probe on my zonestar.

7

In that case, without a light/beep or any way to know when the probe is triggered visually, I think the best bet would be a new macro entirely. One that would call forth the probe status and tell you when the probe is triggered through the console, LCD, or other means. Unfortunately, I wont have the spare time to learn what I need to for a macro like that at the moment. Although I may try to figure it out in a couple months if no progress has been made.