# Z probe won't home, but works

**URL:** <https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412>\
**Category:** General Discussion\
**Created:** [April 1, 2024, 7:22pm UTC](https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412 "2024-04-01T19:22:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Latrocinium](https://avatars.discourse-cdn.com/v4/letter/l/48db29/32.png) [@Latrocinium](https://klipper.discourse.group/u/Latrocinium)\
**Post date:** [April 1, 2024, 7:22pm UTC](https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412/1 "2024-04-01T19:22:59Z")

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### Basic Information:

Printer Model: -CR10V2  
 MCU / Printerboard:- BTT SKR v1.3  
 Host / SBC- Raspi V3  
 klippy.log

_Fill out above information and_ **_in all cases attach your_ `klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_  
_ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _

### Describe your issue:

New CR Touch, Appears to be wired correctly  
when I do the testing with BLTOUCH\_Debug as outlined in the klipper bltouch doc, everything works great. Touch mode, triggered when its pressed, open when not, pin down, etc  
However;  
When doing a G28 to home it homes x,y goes to safe home position in middle of bed and times out with an error: No trigger on z after full movement

I’ll paste the snippets from my config, but am at a loss.  
I notice that on the z home it puts the position at 500+(539.300), so suspect something is causing the out of bounds error to come up I.e. No trigger on z after full movement  
I have tried messing with the boundaries to get it in bounds, but if you increase z max, it sets it even higher. If you decrease z min  
have played with inverting sensor pin, inverting, negating endstop pin, pin up touch mode reports T/F, probe with touch mode T/F  
Changed all one at a time and no effect, except differing errors

Would be grateful for any and all help, thanks.

[stepper\_z]  
step\_pin: P0.22  
dir\_pin: P2.11  
enable\_pin: !P0.21  
rotation\_distance: 8  
microsteps: 16  
#endstop\_pin: !P1.25 # P1.25 for Z-min # P1.24 for Z-max  
#step\_distance: .0025  
#was getting an error for the endstop pin, but trying virtual probe seems to work now  
#still not homing  
endstop\_pin: probe:z\_virtual\_endstop  
#probe:z\_virtual\_endstop  
position\_min: -5  
#position\_endstop: 0  
position\_max: 360

[tmc2209 stepper\_z]  
uart\_pin: P1.10  
run\_current: 0.650  
hold\_current: 0.450  
stealthchop\_threshold: 30

[bltouch]  
control\_pin: P2.0  
sensor\_pin: P1.24  
pin\_up\_touch\_mode\_reports\_triggered: False  
probe\_with\_touch\_mode: True  
#stow\_on\_each\_sample = False #slightly faster probing  
#x\_offset: -52  
#y\_offset: -16  
z\_offset: 1.4  
pin\_move\_time: 1  
speed: 20  
samples: 3  
sample\_retract\_dist: 8.0

# pin\_up\_touch\_mode\_reports\_triggered: True

# probe\_with\_touch\_mode: True

lift\_speed: 40  
samples\_tolerance\_retries: 3

[bed\_mesh]  
speed: 250  
horizontal\_move\_z: 8  
mesh\_min: 20,20  
mesh\_max: 300,300  
probe\_count: 5,5  
#algorithm: bicubic  
fade\_start: 1.0  
mesh\_pps: 2,2

[safe\_z\_home]  
home\_xy\_position: 155,155  
speed: 80.0  
z\_hop: 10.0  
z\_hop\_speed: 10.0  
[klippy.log](https://klipper.discourse.group/uploads/short-url/1NElF3CxQTjOJrpXNYAu1TapJoI.log) (3.0 MB)

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<div class="post-metadata">

**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [April 1, 2024, 7:56pm UTC](https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412/2 "2024-04-01T19:56:20Z")

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Hello @Latrocinium !

Please take care to upload only the newest logs/configs.  
Different ones can lead to confusion.

> [@Latrocinium](#):
>
> ```auto
> #still not homing
> 
> ```

So the the Z-axes does not move at all?  
Does it move to the wrong direction.  
Does it crash into the bed?

* * *

Please make use of the `Preformatted Text` feature of the forum editor when you upload code snippets.  
 ![Format](https://global.discourse-cdn.com/free1/uploads/klipper/original/2X/6/643ab9def96b03089cfb0c194628129fcc96b3f8.png)

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<div class="post-metadata">

**Author:** ![Latrocinium](https://avatars.discourse-cdn.com/v4/letter/l/48db29/32.png) [@Latrocinium](https://klipper.discourse.group/u/Latrocinium)\
**Post date:** [April 1, 2024, 8:06pm UTC](https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412/3 "2024-04-01T20:06:43Z")

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Thanks so much for hopping in.  
It did not home on z at all, Long/Short, switched z motor cable and was fine.  
Did not figure it out until I tried to go back to the old limit switch just to get printing again.  
Must have knicked it or something.  
Posting my fix in case someone else gets stuck.  
Thanks again!

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<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [May 2, 2024, 6:07am UTC](https://klipper.discourse.group/t/z-probe-wont-home-but-works/15412/4 "2024-05-02T06:07:27Z")

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