BL Touch

Gost101

@droftarts The Z probe is at 1000 when I turn it on to answer your question.

fcwilt

@fcwilt it originally didn't have the code line in it
G1 X15 Y15 Z10 F9000
I put that in there so the probe dosen't strike the edge of the bed as it sticks out over and under the bed by 2cm out and 2 cm down. So to get around that I tried to put that snippet there.

Hi,

Thanks. I guess you can understand why it doesn't work and is the source of the error message about un-homed axes.

But what do you mean by 2 cm down?

Frederick

Gost101

@fcwilt The probe is encountering some problems at the moment. Homing all the axis will leave the extruder and probe past and under the bed.

The M303 command for auto tunning keeps canceling due to the bed taking to long to heat up and I'm unable to get the results using M500 due to the process not completing.

Gost101

@fcwilt I'm still getting the error even after commenting G1 X15 Y15 Z10 F9000 Homing Error.PNG line out.

fcwilt

@Gost101 said in BL Touch:

@fcwilt I'm still getting the error even after commenting G1 X15 Y15 Z10 F9000 line out.

You either have a configuration problem, a wiring problem or a defective probe.

Let's work on that:

When you first power up the printer:

does the probe perform it's power up sequence?
what does the DWC (web interface) report for the Z probe sensor status?

Frederick

peter247

@Gost101
@fcwilt is correct you can't move Z unless it is first homed.
so G1 X15 Y15 Z10 F9000 will error because G30 should be before it .

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Sep 28 2020 07:45:49 GMT-0600 (Mountain Daylight Time)
G91                      ; relative positioning
G1 H2 Z5 F9000           ; lift Z relative to current position
G1 H1 X-505 Y-505 F21600 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F9000        ; go back a few mm
G1 H1 X-505 Y-505 F7200  ; move slowly to X and Y axis endstops once more (second pass)
G90                      ; absolute positioning
G1 X15 Y15 Z10 F9000     ; go to first bed probe point and home Z
G30                      ; home Z by probing the bed
 
; Uncomment the following lines to lift Z after probing
;G91                     ; relative positioning
;G1 Z5 F150              ; lift Z relative to current position
;G90                     ; absolute positioning

Gost101

@peter247 @fcwilt
Alrighty guys, to make sure we are all on the same page. I talked with @droftarts through the pm system on here. Wiring is verified in the correct position. The BL Touch is not defective. Because by unplugging the all connected wires to the BL Touch it will perform its power up sequence and status a solid red pin up status. After which by pressing the home all :

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Sep 28 2020 07:45:49 GMT-0600 (Mountain Daylight Time)
G91                      ; relative positioning
G1 H2 Z5 F9000           ; lift Z relative to current position
G1 H1 X-505 Y-505 F21600 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F9000        ; go back a few mm
G1 H1 X-505 Y-505 F7200  ; move slowly to X and Y axis endstops once more (second pass)
G90                      ; absolute positioning
G30                      ; home Z by probing the bed
G1 X15 Y15 Z10 F9000     ; go to first bed probe point and home Z

; Uncomment the following lines to lift Z after probing
;G91                     ; relative positioning
;G1 Z5 F150              ; lift Z relative to current position
;G90                     ; absolute positioning

The BL touch will status solid blue and pin down until contact with the build surface is made. After which the BL Touch will status solid red pin up. If home all is pressed again then the printer will home the X & Y axis in accordance with the home all gcode. Then the BL Touch will status solid blue and pin down while Z is trying to go down. However where it is trying to home is off the build platform here is the picture:
In doing so the Z Axis will continue to try and home z when it cannot.
Once in this state if the printer is reset and home all is executed it will perform the X & Y Axis homing however in doing so the BL Touch will status the following error code:

G28 Z
 
Error: Z probe already triggered at start of probing move
Error: Homing failed

Due to the BL Touch striking the side of the bed.
Any recomendations? Or should I just throw the printer off the balcony and buy an i3 MK3S. Just kidding about throwing the printer and the i3 MK3S.

peter247

@Gost101

you keep missing the important bits .

So back to the 20 questions .

if you tell it to home does it stop if you press the pin ? , if it does that part is working ?.

fcwilt

OK you moved the G30 about the G1 that had the Z10 parameter in your home all file.

I think this is what you want to do.

G1 X213 Y250 ; this positions the probe near the center of the bed
G30
G1 Z10 ; this positions the nozzle at the desired height.

Frederick

droftarts

@Gost101 Looks like it's the bed limits that need to change now. M208 sets the where the bed is in relation to the endstops. For example, at the moment you have:

M208 X0 Y0 Z0 S1                                   ; set axis minima
...
M574 X1 S1 P"xstop"                                ; configure active-high endstop for low end on X via pin xstop
...
G31 P500 X37 Y0 Z2.5                               ; set Z probe trigger value, offset and trigger height

The above effectively says "the X endstop is at the low end (this should be on the left of the X axis, defined by M574), and when the X endstop is triggered, X is set to 0 (defined by M208 X0 S1). The probe is at X37 when the nozzle is at X0 (defined by G31)"

But when the X carriage hits the endstop, the nozzle is off the bed, by what looks to be about 50mm? If you jog X until the nozzle is right on the edge of the bed, it'll be around X50. That's where you want X0, so set M208 X-50 Y0 Z0 S1. Then repeat for the Y axis. Position X0 Y0 should be with the nozzle on the front left corner of the bed.

Ian

Gost101

@peter247 @fcwilt @droftarts The printer homes fine now in addition to making the mesh configuration. Is there any code that I have to put in cura so that it will print based of the bed mesh? This is what I was able to get it to:

droftarts

@Gost101 Great! No, just need to load the mesh before printing; you can put G28 then G29 S1 in the slicer start gcode to load the mesh. Best to probe the bed when it's at temperature, in case heating the bed causes it to change shape.

Not sure why the bed has got a 0.25 mm dip in it; you may want to check it really has. Sometimes it's actually caused by the cables pulling on a loose X carriage, and the bed isn't really that shape.

Ian

Gost101

@fcwilt said in BL Touch:

G1 Z10

@droftarts I'm getting a heater fault notification every time the bed heats up past ~58C when it will heat up to ~70C before the firmware update. Is there a timer or something that I can remove to ignore the fault tripping in config?

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Sep 28 2020 07:45:49 GMT-0600 (Mountain Daylight Time)

; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"A.C.E."                                     ; set printer name
M918 P1 E4 F2000000                                ; configure direct-connect display

; Network
M551 P"SpaceForceHu2020!!"                         ; set password
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet

; Drives
M569 P0 S1                                         ; X physical drive 0 goes backwards
M569 P1 S1                                         ; Y physical drive 1 goes backwards
M569 P2 S0                                         ; Z One physical drive 2 goes forwards
M569 P2 S0                                         ; Z One physical drive 2 goes forwards
M569 P3 S0                                         ; E physical drive 3 goes backwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z400.00 E415.00                  ; set steps per mm
M566 X1200.00 Y1200.00 Z24.00 E300.00              ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00            ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00              ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1000 I50                      ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X500 Y500 Z500 S0                             ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                                ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                                ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S2                                         ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"exp.heater7"                             ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F600 T9000                ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X37 Y0 Z2.150                               ; set Z probe trigger value, offset and trigger height
M557 X30:470 Y30:470 S25                           ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092     ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                              ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B1 S1.00                                   ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S70                                        ; set temperature limit for heater 0 to 70C
M308 S1 P"e0temp" Y"thermistor" T100000 B4092      ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                               ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit

; Fans
M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
M106 P0 S1 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                               ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45                                  ; set fan 1 value. Thermostatic control is turned on
M950 F2 C"fan2" Q500                               ; create fan 2 on pin fan2 and set its frequency
M106 P2 S1 H1:0 T45                                ; set fan 2 value. Thermostatic control is turned on

; Tools
M563 P0 S"Hot end" H1 D0 F1:2                           ; define tool 1
G10 P1 X0 Y0 Z0                                    ; set tool 1 axis offsets
G10 P1 R0 S0                                       ; set initial tool 1 active and standby temperatures to 0C


; Custom settings are not defined

; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

Gost101

The error is as follows:

Error: Heater 0 fault: temperature rising much more slowly than expected 1.8*C/sec

jay_s_uk

PID tune the bed using

M303 H0 S70

Save the values using

M500

Then either copy the values from the config-override to your config.g or add M501 to the end of config.g

Gost101

at around~63*C the M303 fails @jay_s_uk

droftarts

@Gost101 See https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control#Section_Troubleshooting_auto_tuning

If auto tuning fails with a message that the temperature is not rising fast enough, this indicates that either you are using too low a P value in the M303 command, or the dead time in the existing model is much too low for your heater. You can increase the dead time using the M307 command. For example, sending M307 H0 D30 will increase the dead time to 30 seconds. The actual dead time will be known after a successful auto tuning.

Edit: Send M307 H0 to see current settings.

Edit2: Has the bed always heated really slowly?

Ian

Gost101

@droftarts The bed has always heated slowly

	M307 H0
Heater 0 model: gain 340.0, time constant 140.0, dead time 5.5, max PWM 1.00, calibration voltage 0.0, mode bang-bang

droftarts

@Gost101 send M307 H0 D30 and try tuning again. Sounds like the bed heater is underpowered for the bed size.

Ian

Gost101

@droftarts said in BL Touch:

M307 H0 D30

Here is the image from the tuning: