Ok,
Thanks you for all your reply
i will test to unscrew method

but ok if happen is not a problem i didn't know that

hmm is there a way to mark this thread solved ?

@gixxerfast said in BL Touch not working:

Which version of RRF are you using, ver 2? I can't see that you've mentioned it.

EDIT: OK, so you're using RRF 3.3

Then I think you should config the BLTouch differently:

Have you read this bit, "Software setup (RepRapFirmware 3)" for the https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe

Either I'm a sloppy reader or I can't see that you have the M950

AS in this example:
2. Create a GPIO/Servo pin index using your chosen control pin, for example:

M950 S0 C"io7.out" ; Duet 3 MB6HC
M950 S0 C"io3.out" ; Duet 3 Mini 5+
M950 S0 C"exp.heater3" ; Duet 2 WiFi/Ethernet
M950 S0 C"duex.pwm1" ; Duet 2 WiFi/Ethernet + DueX2/5
M950 S0 C"!exp.heater6" ; Duet 2 WiFi/Ethernet + BoB
M950 S0 C"zprobe.mod" ; Duet 2 Maestro

Thank you, that did the trick! I must have overseen that section and used outdated sources. There are so many out there, you don't see the wood for the trees.

Also my deployprobe.g and retractprobe.g files referenced P7 rather than P0 as was mentioned in one of the guides. But these files reference the probe input rather than the heater, so P0 is the correct setting.

These are the correct settings and corresponding files:

config.g

; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Clayster" ; set printer name M302 P1 ; enable cold extrusion for clay printing ; Network M552 S1 ; enable network M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; Drives M569 P0 S1 ; X1 M569 P1 S1 ; Y (reversed) M569 P2 S0 ; Z1 M569 P3 S1 ; E0 (Extruder, reversed) M569 P4 S1 ; E1 (Ram, reversed) M569 P5 S0 ; Z2 M569 P6 S0 ; Z3 M569 P7 S0 ; X2 M569 P8 S0 ; Z4 M569 P9 S0 ; n/a M584 X0:7 Y1 Z2:5:6:8 E3:4 ; remap motors M350 X16 Y16 Z16 E8:16 I1 ; configure microstepping with interpolation M92 X100.00 Y100.00 Z1600.00 E1000.00:1000.00 ; set steps per mm M566 X500.00 Y500.00 Z20.00 E1000.00:500.00 ; set maximum instantaneous speed changes (mm/min) M203 X5000.00 Y5000.00 Z600.00 E6000.00:400.00 ; set maximum speeds (mm/min) M201 X150.00 Y200.00 Z500.00 E1000.00:500.00 ; set accelerations (mm/s^2) M906 X1200 Y1200 Z500 E2000:2000 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; set idle timeout ; Axis Limits M208 X0:390 Y0:365 Z0:350 S1 ; 390mm x 365mm x 350mm ; Bed leveling geometry & leveling M671 X470:470:-70:-70 Y400:-40:400:-40 S20 ; position leadscrews (S = adjust max.) ; Endstops M574 X1 S1 P"xstop+e0stop" ; configure active-low endstop for 2 X-motors M574 Y1 S1 P"ystop" ; configure active-low endstop for low end on Y via pin ystop ; Filament sensor for Ram M591 P1 C"e1stop" S1 D1 ; extruder (Ram) endstop ; Z-Probe (capacitive sensor) ;M558 P5 C"^!zprobe.in" I1 ; default travel (5mm) ;G31 P1000 X0 Y0 Z0.475 ; Z = offset (greater value = closer to bed) ; Miscellaneous M575 P1 S1 B57600 ; enable support for PanelDue ; Tool 1 (Ram 80mm) M563 P1 D0:1 S"80mm" ; enable tool 1 and extruder E0 (D0) & E1 (D1) M567 P1 E1.00:0.03200 ; mixing ratio (77% more volume) G10 P1 S0 R0 X0 Y0 ; axis offsets for extruder G10 P1 R0 S0 ; set extruders active and standby temperature to 0 Celsius ; Tool 2 ("Pause") M563 P2 D1 S"Pause" ; retract ram motor when ram endstop is triggered ; Enable moving of axes before homing M564 H0 S1 ; S0 = move beyond axis limits, H0 = move without homing ; BL Touch M950 S0 C"duex.pwm5" ; assign heater 7 on the Duex5 to BL touch M558 P9 C"^zprobe.in" H5 F500 T6000 ; P = Z probe type 9, H = dive height, F = speed G31 P25 X0 Y-36 Z0.0 ; Z probe trigger value, offset in relation to nozzle

deployprobe.g

M280 P0 S10

retractprobe.g

M280 P0 S90

Thank you for your help! You made my day!

@signpostman it literally is as simple as adding S2 to the end of your M671 line (replacing the S1 if you have it). You'll have probably put your M671 command in your config.g file, but might be in your bed.g file instead as @tecno suggests

@droftarts
Thank you, that was the problem, thank you very much you are amazing 😁

can you please share your config? this can help me too

Yes out of the box it should work fine. Though I'm not sure if anyone has reported on using the 2020 version yet, so do let us know if you have any issues, but if it's anything like the past v2 and v3 versions it should work without issue with no alteration.

Okay, so I did small research and I think all problems are solved. A bit of information, maybe someone else will also struggle with similar problem.

1. Using buck/boost converters near signal wires (like probes) might induce noise and cause problems
2. If you struggle with unstable printer work/your voltage readings (in DWC) vary under load (even if PSU ratings are higher than requirements of your setup) check your PSU in diffrent position (horizontal/vertical), if it makes diffrence you probably have problem with cold solder joints - if you are familiar with soldering and electronics - redo solder joints in your PSU - if not, better not to do it yourself.

I did small research for my printer, decided to do some tests with opened enclosure of PSU to measure some things and noticed, when I test it laying flat, there is no problem (in printer PSU is mounted vertically), as soon as I mount it back, problem occured again.
Decided to redo all solder joints on PCB (I couldn't find anything that looked really suspicious) with special attention for filtering sections, added also some lead-solder. After that I don't have any problems like before.
I think problem is solved.

this happen to me i fix by going to endstop config and switch from false to true and that fix the homing problem