Bl-Touch self extended

Heartleander81

Startcode

T0 
G32 		                   ; True Bed Leveling und Meshbedleveling
G29 S1 P"heightmap.csv"         ; Load Mesh
G1 X5 Y5 Z15 F6000 	           ; Move the platform down 15mm 
;M117 Prime the extruder 
G92 E0                         ; reset extruder
G1 E3 F200                     ; Extrude 3mm
;M117 Purge Extruder 
G92 E0                         ; reset extruder 
G1 Z1 F1000 	               ; move z up to prevent scratching of surface 
G1 X10 Y10 Z0.3 F5000          ; move to start-line position 
G1 X10 Y200 E15 F1500          ; draw 1st line 
G1 X10.8 Y200 F5000            ; move to side a little 
G1 X11.6 Y2 E30 F1500          ; draw 2nd line 
G1 Z17 F3000                   ; Move Bed 17mm down
G1 E15 F300                    ; Extrude 15mm
G92 E0                         ; reset extruder
G4 S5                          ; Wait 5 second

Endcode

M104 S0
M140 S0
M107
G92 E1
G1 E-1 F300						;Retract the filament
G1 X5 Y300 Z290 F6000

BDubs

@Heartleander81 I was just reading the BLT documentation the other day and it mentioned it being susceptible to noise from the hotbend heater wires (guessing 12/24v pwm stepping on the BLT 3.3/5v signal) Wondering if this is your issue...

Of course I can't find it now to link...

Heartleander81

@BDubs That would be an explanation. Was the fault on the board or was it from the cables? is the best way to shield the Bl-Touch?

BDubs

@Heartleander81 said in Bl-Touch self extended:

@BDubs That would be an explanation. Was the fault on the board or was it from the cables? is the best way to shield the Bl-Touch?

Still can't find it...arrg...

They mentioned turning off the nozzle heater (to effectively kill the PWM signal) when probing to prevent it from being susceptible to noise.

In terms of shielding, I'd try using shielded cable and be sure to properly connect the ground/drain to your chassis in such a way as to avoid a ground loop.

Phaedrux

M558 B1 will turn off the heaters during the probing move.

https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M558_Set_Z_probe_type

@Heartleander81 said in Bl-Touch self extended:

DWC always says "not stopped"

Where are you seeing not stopped?
How are you testing the BLTouch?

If you send M401 and M402 does the pin deploy and retract?
If you send G30 does the pin deploy and start to move the z axis?
Does triggering the pin by hand stop movement?

Heartleander81

@Heartleander81 said in Bl-Touch self extended:

DWC always says "not stopped"

Where are you seeing not stopped?
How are you testing the BLTouch?

If you send M401 and M402 does the pin deploy and retract?
If you send G30 does the pin deploy and start to move the z axis?
Does triggering the pin by hand stop movement?

On the DWC ore with M119 Z not stopped and Z-Probe not stopped

M401 and M402 do the deploy and retract.
G30 do it all. Deploy and start when i push the pin axes stop.

But why deploy the pin when I print ore after print deploy and retract from self?

Phaedrux

Ok, so the BLTouch is otherwise working correctly, it's just occasionally deploying the pin when it doesn't?

Interference on the servo wire could be possible. Can you separate the BLtouch wires from the rest in the bundle?

Heartleander81

@Phaedrux I can test it. But take some time. 2-4h. When my child is go to bed, i have more time.

Heartleander81

@Phaedrux
First print and the pin doun't come out. I think that was it.

Phaedrux

@Heartleander81 said in Bl-Touch self extended:

I think that was it.

So it's working now?