With a BL-Touch and an accelerometer on the print head, I suddenly need more wires to the extruder (this is stil la bowden drive Ender 5). So working with what I have at hand, I stripped the plugs from an old Kat5 cable and use it as sensor wire.

So I designed this completely not over engineered BL-Touch and and ADLX-345 holder for my Ender 5.

After all the wiring has been soldered and put in place, the printer had to be calibrated again. Here is the procedure:

Test Bl-Touch

Check if the wiring is ok, the Bl-Touch is glowing red – good sign.

1. Check if the touch moves:
   • BLTOUCH_DEBUG COMMAND=touch_mode
   • BLTOUCH_DEBUG COMMAND=pin_down
2. check if state can be read
   • QUERY_PROBE: probe: open
   • push with the fingernail against the probe: QUERY_PROBE: probe: TRIGGERED
   • BLTOUCH_DEBUG COMMAND=pin_up
   • QUERY_PROBE: probe: open
3. Home and test if the Z-Axis stops
   • G28 start homing
   • wait for Z-Axis to move and gently push against the touch
   • z-Axis should stop, if not power printer off to prevent the nozzle hitting the bed
4. Restart homing and see if BL-Tocch stops Z-Axis
   • G28
   • Wait, see and pray (be ready to turn off the printer ^^)

Calibrate BL-Touch

X/Y Axis: Measure Offset

This should have not changed, but for goos measure we gonna check again. Mark a position in the center of the bed with tape and move the nozzle to that point.

GET_POSITION

17:11 mcu: stepper_x:6689 stepper_y:9960 stepper_z:-23251
      stepper: stepper_x:143.000000 stepper_y:137.000000 stepper_z:1.001000
…

Now move the extruder so that the BL-Touch is above the marker and measure position again:

GET_POSITION

17:13 mcu: stepper_x:9969 stepper_y:11000 stepper_z:-23251
      stepper: stepper_x:184.000000 stepper_y:150.000000
…

So the offset is X: 143 - 184 = -41 and Y: 137 - 150 = -13. Let’s update the printer.cfg file:

[bltouch]
…
x_offset: -41.0
y_offset: -13.0
…

Issue a RESTART command so that the new values take effect.

Z-Axis

Do a normal paper calibration.

1. Start by homing the printer and then move the head to a position near the center of the bed. Run the PROBE_CALIBRATE command from the Terminal.
2. Use the on screen menu to adjust the Z-Axis using the proven paper test method.
3. When don click ACCEPT and issue a SAVE_CONFIG.

If the following error occurs:

17:20 Move out of range: 79.000 117.000 -0.151 [0.000]

The manually set a z-Offset in the config , save and restart Klipper. Repeat.

1[bltouch]
2…
3z_offset: 4