@chrishamm works perfectly fine thank you for helping me out!

@t3p3tony just upgraded, will check this later today!

Had some heater faults due to layer fan cooling down hotend too much.
Have to figure out why PID is off/doesn't compensate, but that's another topic.

This is about when heater fault state actually kicks in.
The annoying experience I just made is: One will not notice until it is too late to check/fix.
The printer will not pause, there will be no error message.
If you're lucky you'll stumble upon the lowering temp chart graph or notive the small "fault" label on DWC.

My proposal for improvements are:

• RRF should log an error message on heater fault to make it more visible
• RRF should call system macro heaterfault.g if it exists to allow for individual handling

A fault should attract attention immediately. It may be a threat to the printer, even catch fire. In best case the print is unusable.
In any of these cases I would want to be notified immediately.

Old threads discussing this without visible results:

• https://forum.duet3d.com/topic/1603/temperature-fault-macro
• https://forum.duet3d.com/topic/3156/how-should-the-firmware-respond-to-a-heater-fault/13

OwenD created a deamon.g which can be used.
But I consider it a workaround - complicated solution, and it will not react immediately due to ~1Hz frequency.
Pausing the print there might already be too late for flawless continuation.
https://forum.duet3d.com/topic/20722/heater-fault-checking-routine-to-be-run-in-daemon-g

A macro would be best; I'd use it to do various things:
pause the job, display an error, saving resurrect state and generate audible sound to let me know something's off there.

Pausing works fine again and the speed multiplier seems to be fixed too!

@t3p3tony weird, I just powered up to check on any errors as you suggested, but this time everything was initialized correctly.
I'll let you know here in case it happens again.

@chrishamm that fixes it thank you!

Hi!

In spring, a beacon firmware update introduced a new "Contact" feature, shorty described as "Low Force Nozzle Touch Probing for Beacon".
See blog post for some details: https://beacon3d.com/press-release/

It appears they've managed to find a reliable way to detect when the nozzle impacts the bed with minimal force.
With this feature, finally full and detailed, automated Z homing and calibration becomes possible.

My question is, will this feature be implemented for Duet SZP and alikes as well? Is it maybe already being worked on?
Couldn't find any info or thread on this, so I thought its the right time to open one

Thank you,
Jannik

Great work! I'm thinking of adding such a setup to my V-Core in the future. Thanks for sharing, this will be helpful! It was a bit difficult to see in the vid... what sensor is being used to measure the nozzle Z position? The demo that I recently saw had an aditional fixed Z probe mounted in a corned of the bed, but watching the video it looks like you use a different approach.

ah yes this makes sense thanks @gloomyandy !

@t3p3tony weird, I just powered up to check on any errors as you suggested, but this time everything was initialized correctly.
I'll let you know here in case it happens again.

I saw some movement issues on my printer the last few days. Turns out that some/all settings that should be loaded in config.g via macro call M98 P"config_defaults.g" are not being applied.
For that reason the printer tried to use way off acceleration and velocity values.
I guess it likely is the call of the macro that doesn't work like before.

Using 3.4 b5 in SBC mode.

config.g

G90                                     ; send absolute coordinates...
M83                                     ; ...but relative extruder moves
; M550 P"V-Core 3"                        ; set printer name -- only for standalone use with network
M669 K1                                 ; CoreXY
G29 S1                                  ; Set Units to Millimeters

; mainboard
; OUT4-6 @ 12V
; OUT 7-9 @ 24V
; 0.DRIVER_0 => Z
; 0.DRIVER_1 => Z
; 0.DRIVER_2 => Z
; 0.DRIVER_3 => Y
; 0.DRIVER_4 => X
; 0.DRIVER_5 => Extruder
; 0.IO_0     => X Endstop
; 0.IO_1     => Y Endstop
; 0.IO_5     => Z Probe BLtouch
; 0.TEMP_0   => Bed Temp
; 0.OUT_1    => Bed Heater
; 0.OUT_2    => Hotend Heater
; 0.OUT_4    => Duet/Raspi Fan (Fan10)
; 0.OUT_7    => Hotend Fan (Fan0) (2pin)
; 0.OUT_8    => Layer Fan (Fan1) (2pin)
; 0.TEMP_1   => Hotend Temp
; OUT9 5V/PWM is used for powering relay

; toolboard uses default CAN address #121
; 121.IO_0   => Z Probe BLtouch
; 121.IO_1   => (Filament Monitor)
; 121.IO_2   => X Endstop
; 121.TEMP_0 => Hotend Temp
; 121.OUT_0  => Heater
; 121.OUT_1  => Hotend Fan 4-pin
; 121.OUT_2  => Layer Fan 3-pin
; 121.DRIVER_0 => Extruder

G4 S1                                   ; wait for expansion boards to start


; Define Motors =====================================================================

M569 P0.0 S0 D3                         ; Z motors run backwards
M569 P0.1 S0 D3                         ; Z motors run backwards
M569 P0.2 S0 D3                         ; Z motors run backwards
M569 P0.3 S1 D3                         ; Y goes forwards
M569 P0.4 S1 D3                         ; X goes forwards
M569 P121.0 S1 D3                       ; Ext goes forwards
M584 X0.4 Y0.3 Z0.0:0.1:0.2 E121.0      ; assign drives to axes
M350 X16 Y16 Z16 E16 I1                 ; configure microstepping with interpolation

;Step sizes
M92 X80.00 Y80.00 Z800.00               ; set steps per mm
M906 X1000 Y1000 Z800 I30               ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                 ; Set idle timeout


; Define Axes and endstops =====================================================================

; define axis limits
M208 X0 Y0 Z0 S1                        ; set axis minima
M208 X310 Y287 Z300 S0                  ; set axis maxima

; define endstops
;M574 X1 S1 P"io0.in"                   ; configure active high endstops
M574 X1 S1 P"121.IO_2.in"               ; configure active high endstops
M574 Y2 S1 P"0.IO_1.in"                 ; configure active high endstops
M574 Z1 S2                              ; configure Z-probe endstop for low end on Z


; Define Bed =====================================================================

; Lead screw positions
; this defines the position of the SCREWS!
; to configurate measurement points, check bed.g
; Y axis is reduced to 287 [13-300], adapted Y position of Z screws accordingly!
M671 X-3:150:306.5 Y-16:292:-16 S2                         ; define positions of Z leadscrews or bed levelling screws | ideal: X-4.5:150:304.5 Y-4.52:305:-4.52 S5
M557 X10:275 Y10:262 P5                                ; define 5x5 mesh grid -- Y is limited to 287, update Y range accordingly!

; configurate heat bed
M308 S0 P"temp0" Y"thermistor" T100000 B3950 A"Bed"    ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out1" T0                                     ; create bed heater output on out5 and map it to sensor 0
M307 H0 B0 S1.00                                       ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                                ; map heated bed to heater 0
M143 H0 S110                                           ; set temperature limit for heater 0 to 110C

; Set the Bed PID values - gathered from PID tune
M307 H0 B0 R0.435 C373.3 D1.30 S1.00 V23.9


; Define BLTouch Sensor =====================================================================

M950 S0 C"121.IO_0.out"                     ; Create servo pin 0 on io5
M558 P9 C"121.IO_0.in" H8 F320 T18000 A5    ; set Z probe type to unmodulated - dive height increased from 5mm, Feed rate increased from 240. P9 = type bltouch

; Z offset calibrated using guide https://betrue3d.dk/bltouch-on-duet-wifi-configuratio-and-usage/#testandcalibrate
; Z3 means: Set Z=3mm when probe is triggered. So a smaller value will set the minimum Z further away from the head.
; Calibrate Z so that a piece of paper does only move with friction between nozzle and bed. Babystepping adds a senseful offset for printing.
G31 P25 X-28.00 Y-23.00 Z4.21               ; set Z probe trigger value, offset and trigger height, more Z means closer to the bed


; Define Tool 0 =====================================================================

M563 P0 D0 H1 F1                                ; define tool 0
G10 P0 X0 Y0 Z0                                 ; set tool 0 axis offsets
G10 P0 R0 S0                                    ; set initial tool 0 active and standby temperatures to 0C

; hotend heater and temperature sensor
M308 S1 P"121.TEMP_0" Y"pt1000" A"Hotend"       ; register hotend temperature sensor
M950 H1 C"121.OUT_0" T1                         ; create nozzle heater output on out2 and map it to sensor 1
M307 H1 B0 S1.00                                ; disable bang-bang mode for heater and set PWM limit
M143 H1 S290                                    ; set the maximum temperature in C for heater

; Set the Hotend PID values - gathered from PID tune
;M307 H1 B0 R1.989 C208.6 D6.92 S1.00 V23.9
M307 H1 B0 R1.926 C77.3 D5.96 S1.00 V24.2

; define extruder / hotend
M92 E830         			                    ; set extruder steps per mm, 0.9 angle/step (LDO Pancake)
M906 E800         			                    ; set extruder motor current (mA) and idle factor in per cent
M302 S150 R110 			                        ; Allow extrusion starting at 150°C and retractions starting at 110°C
M207 S4.0 F1600 Z0.1                            ; configurate G10/G11 extruder retraction, move 4mm, also move bed 0.1mm


; Define Fans =====================================================================

; Hotend Fan - sunon fan needs high PWM, foun in an amazon review
M950 F0 C"121.OUT_1" Q31400                     ; create fan on pin out7 and set frequency to 31 kHz
M106 P0 C"Hotend Fan" S0 H1 L0 X0.5 T60:250     ; configurate fan. H1 = Thermostatic control ON , -1 = OFF | L/X = min/max Speed | T = temperature range

; Layer Fan
M950 F1 C"121.OUT_2" Q500                       ; create fan on pin out8 and set its frequency
M106 P1 C"Layer Fan" S0 H-1 L0.5                ; configurate fan. Thermostatic control is turned off

; back CPU/PSU fans
M308 S10 Y"mcu-temp" A"MCU" 		            ; configure sensor 10 to represent MCU temp
M308 S11 Y"drivers" A"Drivers" 		            ; configure sensor 11 to represent Drivers temp
M950 F10 C"!out4+^out4.tach" Q100	            ; create fan 10 on out4 (1st PWM slot)                    
M106 P10 C"Duet/RasPi Fan" H10:11 L0.3 X1 B0.3 T35:70 ; assign fan 10 to sensors 10 and 11 | B = run x seconds on full power | L + X = min/max bounds


; setup Accelerometer =====================================================================

; First digit: orientation of accelerometer Z axis
; second digit: orientation of acc. X axis
; 0 = +X, 1 = +Y, 2 = +Z, 4 = -X, 5 = -Y, 6 = -Z.
M955 P121.0 I24 ; use accelerometer @ 121.0, axis config 2,4


; set defaults =====================================================================

; contains default movement and acceleration speeds 
; as well as things like speed / eextrusion factor, microstepping etc 
; nozzle / filament diameter
M98 P"config_defaults.g"



; for unknown reasons this does not work in config.g but in homeall.g.
; toggle the ATX relay once to let duet know we use one. THis will show the ATX power widget in DWC
;M80
;G4 P1000 ; need a short pause 
;M81 S0

config_defaults.g

; (re)set defaults

M566 X400.00 Y400.00 Z6.00 E120.00 P1          ; set maximum instantaneous speed changes (mm/min) // same as M205 but with mm/min
M201 X6000 Y6000 Z50 E3600                    ; set accelerations (mm/s^2)
M203 X10800.00 Y10800.00 Z600.00 E3600.00     ; set maximum speeds (mm/min)
M204 P6000 T6000                               ; Set printing and travel accelerations
M205 X8 Y8 Z8                                  ; custom jerk - A
M593 P"zvd" F44.3 ; Input shaping

T0                                             ; Select tool 0
M220 S100		                               ; Set speed factor to 100%
M221 S100		                               ; Set extrusion factor to 100%
M290 R0 Z0.25 			                           ; babystepping 0 , R0 = absolute mode R1 = relative, add to configurated babystepping offset
;G10 P0 R0 S80		                           ; Set extruder to 80 and release

M404 N1.75 D0.4                                ; Filament width and nozzle diameter

@t3p3tony I will let you know if anything new occurs. Maybe b5 and the tweaked raspi settings helped to make it go away. As the error did not occur often in the past, I'll continue and observe for some days.

@owend I agree to your thoughts, however I think my idea is a bit different to what you described. Maybe my initial post was too imprecise.

I am not talking about a macro REPLACING the automated fault reaction.
I am talking about a macro called AFTER reacting to a fault.

As far as I can see this does not violate any safety behavior or risk the safety routines to be broken.
However it allows for additional, individual measurements. Let yourself be notified by a beeper that there's some trouble for example. That would even increase safety because one will take notice sooner and can react faster.

In other cases, like those that have just happened to me, there was no real fault, just the layer fan at 100% cooling the hotend so much that a fault was detected.
In this case, if the printer stops immediately (Toolboard CAN fix) and notifies me immediately (beep, show a big message), I am able to react fast enough to check what has happened and allow the print to continue. (Of course only if I'm 100% sure no real fault has happened. And yes, I already did this successfully, but only could do so cause I knew a certain print will very likely fail due to "cooldown fault" and was sitting next to the printer with a finger on the pause key.)

@chrishamm works perfectly fine thank you for helping me out!

@t3p3tony chrome shutdown/crash is fixed by the solution proposed in other topic!
About the number of processes, that's my fault. I just noticed that htop was showing not only processes but every thread too. I do still see a dozen processes but that is not unusual for chrome.

@chrishamm that fixes it thank you!