BLTouch almost working

General Discussion
1

Basic Information:

Printer Model: Kingroon KP5L
MCU / Printerboard:Standard
klippy.log
klippy.zip (282.8 KB)

Hi, I have been trying to get a BLTouch working on my Kingroon KP5L. I have double checked all the wiring and am confident that it is correct.
I have extended and retracted the probe using the console. It extends and retracts fine. If I do a probe query, I get “Triggered” both when it is extended and when it is retracted.
If I run g28 to home all, it homes X and Y correctly, then it moves into position to probe Z, the probe extends for a brief moment then retracts and thats where it stops.
The console shows the following,
7:49 PM

BLTouch failed to raise probe

7:49 PM

Failed to verify BLTouch probe is raised; retrying.

7:49 PM

Failed to verify BLTouch probe is raised; retrying.

It is showing this even though the probe is retracted. It feels that it is so close to being right, but I can’t work out what is wrong.
Any help would be greatly appreciated

Cheers

2

The full error section is this:

Unable to obtain tmc stepper_z phase
Failed to verify BLTouch probe is raised; retrying.
Unable to obtain tmc stepper_z phase
Failed to verify BLTouch probe is raised; retrying.
Unable to obtain tmc stepper_z phase
BLTouch raise probe error: BLTouch failed to raise probe

and it starts with this:

TMC stepper_x failed to init: Unable to read tmc uart 'stepper_x' register IFCNT
TMC stepper_y failed to init: Unable to read tmc uart 'stepper_y' register IFCNT
TMC stepper_z failed to init: Unable to read tmc uart 'stepper_z' register IFCNT
TMC extruder failed to init: Unable to read tmc uart 'extruder' register IFCNT

Is the printer board powered up, are there steppers inside, are they in proper condition?

3

Yes, the board is powered up and all axis’s move. The printer.cfg file that I downloaded was kept very basic with all the steppers, bed, bltouch, tmc cfg files listed seperately. The printer.cfg files had “include tmc.cfg” “include bltouch.cfg” .etc. When setting up klipper first I kept getting an error about .tmc failing. I reached out on here and someone suggested I didn’t included the tmc.cfg file. That got it working so I left it that way.

4

this is original bl-touch or 3d-touch ?

and this probe create “peak” of current , in my printer , this peak bug motherboard , solution , big 5V supply or separate 1amp supply only for probe !

or upgrade to better motherboard

in my case , 3d-touch bugging to ramp’s or mega2560 directly , but work fine on mks motherboard

possibly add filter (1pf + 1µf 10v capa in // on supply sensor )

but if probe retract directly

1 supply too low
2 sensor defect
3 mistake on 3dtouch config !

for tmc , you have not correct uart pin config !

5

It is a Geeetech 3d-touch. I did not want to replace board as this is a new printer. I believe it isn’t a uart board.

6

if your drivers is not tmc220x or not uart connected , modify your printer.cfg and comment line for tmc (add # before line to desactive fonction ) and correct jumper setting for use in standalone drive !

i am geetech 3D touch , in mks board and klipper , no bug :slight_smile: , but really bug on ramps , verify if you have good 5V supply on 3dtouch before ! , and check if your 5v not “falling” if you probing , is falling , problem on 5V supply , if not , add 1pF cap on 5V supply sensor

7

Thanks for following up on this. I had already put the # before the include tmc.cfg . This was what I had to do to get the printer working at all. I do have a genuine bltouch on one of my ender3’s. Maybe I’ll try that and see if it works.
I had trouble initially flashing my printer so a guy on a Kingroon support group sent me a .bin file to use.
Would that make any difference?
The probe seems to function properly, it just doesn’t stay extended when it should home z.

8

Hi, I had the same problem.
The error was in the wiring, the BLTouch white and black wire must be connected instead of the Z-axis limit switch. It is marked Z- on the board, not in the free slot Z+

1 Like
9

Thank you same issue for me and re-landing the black/white from the limit switch to the bltouch conector fixed it as well. Marlin had no issues with that but klipper must only look at the bltouch wire