problems with M280 P0 when heated bed active

apak

Hello, I have a Any Predator with lots of mods.

duet3 ethernet, smarteffector, haydens, etc...

Just install a 5V psu, and 1x3 strips of 46 leds of ws2812fx (each tower)

config with P280 S0 C"exp.heater3" and a arduino nano to read values and change led effects.

Everything works fine, except if I print with heated bed on.

In that case, pwm reading from heater3 pin on the arduino, are not stable and change rapidly.

To change Colors I did macros like M280 P0 S1000, pwm reading are stable (+- some gap but stable), but once I turn heated bed on, gos crazy.

config

; config.g
; Called on power-up of the Duet Electronics

; General preferences
G90										; Send absolute coordinates...
M83										; ...but relative extruder moves

; Network
M550 P"Predator"							; Set machine name
M552 S1 P192.168.0.23
M553 P255.255.255.0
M554 P192.168.0.1
M586 P0 S1									; Enable HTTP
M586 P1 S0 ;C"*"									; Allow FTP and Cross Origin Resource Sharing (CORS)for DueUI
M586 P2 S0									; Disable Telnet

; Delta Settings v6
;M665 L440.833:440.833:440.833 R228.023 H419.445 B185.0 X0.087 Y0.037 Z0.000
;M666 X-0.381 Y0.083 Z0.298 A0.00 B0.00
M665 L440.833:440.833:440.833 R234.928 H413.488 B190.0 X0.033 Y-0.095 Z0.000
M666 X-0.152 Y-0.112 Z0.264 A0.00 B0.00


; Drives direction
M569 P0 S0									; Drive 0 goes backwards
M569 P1 S0									; Drive 1 goes backwards
M569 P2 S0									; Drive 2 goes backwards
M569 P3 S0									; Drive 3 goes forwards
M584 X0 Y1 Z2 E3                            ; Map drivers
; Steps
M350 X16 Y16 Z16 I1								; Configure micro-stepping with interpolation for X, Y, Z 
M350 E16 I1								; Configure micro-stepping with interpolation for E
M92 X80 Y80 Z80 E415								; Set steps per mm
; Speed, Acc and Jerks
M203 X36000 Y36000 Z36000 E4200							; Set maximum speeds (mm/min)
M201 X4000 Y4000 Z4000 E3000							; Set accelerations (mm/s^2)
M204 P1000 T4000										; Set printing and travel accelerations
M566 E600						;600	  ; Set maximum instantaneous speed changes (JERKS) (mm/min) ONLY EXTRUDER
M205 X8 Y8 Z8							; Set maximum instantaneous speed changes (JERKS) (mm/seg) XYZ . USE this for Marlin COMPATIBILITY
; Stepper Current
M906 X1250 Y1250 Z1250 E500 I30							; Set motor currents (mA) and motor idle factor in per cent
M84 S30														; Set idle timeout

; Axis Limits
M208 Z-1 S1									; Set minimum Z

; Endstops
M574 X2 S1 P"xstop"								; Set active high endstop on X on pin xstop
M574 Y2 S1 P"ystop"								; Set active high endstop on Y on pin ystop
M574 Z2 S1 P"zstop"								; Set active high endstop on Z on pin zstop

;Filament runout sensor
;M591 D0 P2 C"e0stop" S1 						; Set filament runout sensor connected to E0 endstop

; ZProbe
M558 P8 R0.4 C"zprobe.in+zprobe.mod" H5 F900:450 T9000 ;A3 S0.03    ; set Z probe type to effector and the dive height + speeds
G31 K0 P500 X0.0 Y0.0 Z-0.120 ; Z-0.065                                ; set Z probe trigger value, offset and trigger
M557 R170 S25									; Define mesh grid

; Heaters
; Heated Bed
M308 S0 P"bedtemp" Y"thermistor"  T100000 B3950 C0 R4700 A"Bed"			; Define Sensor0 as the heated bed temperature TRY B4300
M950 H0 C"bedheat" T0								; Define Heater0 as the heated bed, bind to Sensor0				; PID M950 H0 C"bedheat" T0								; Define Heater0 as the heated bed, bind to Sensor0				; PID 
M140 H0                                                   ; map heated bed to heater 0
M143 H0 P0 S120 A2                                      ; disable temporarily H0 if temp exceeds 120C
M143 H0 P0 S130 A0                                      ; heater fault H0 if temp exceeds 130C
M307 H0 B0 S1.00                                     ; disable bang-bang mode for the bed heater and set PWM limit
M570 H0 P60 T15 S0                                      ; heater fault for 60seg of 15ºC excursion

; Hotend1
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 A"Hotend"				; Define Sensor1 as Extruder0 temperature
M950 H1 C"e0heat" T1								; Define Heater1 as Extruder0 heater, bind to Sensor1
M143 H1 S275 A2                                         ; disable temporarily H1 if temp exceeds 275C
M143 H1 S285 A0                                         ; heater fault H1 if temp exceeds 280C
M307 H1 B0 S1.00                                        ; disable bang-bang mode for heater  and set PWM limit
M570 H1 P10 T30 S0                                      ; heater fault for 10 seg of 30ºC excursion

; Heater model parameters
M307 H0 R0.424 C339.976:339.976 D1.51 S1.00 V24.6 B0
M307 H1 R2.147 C268.6 D10.79 S1.00 V24.5

; Fan0 = Part Coooling
M950 F0 C"fan0" Q500								; Define Fan0 for Part Cooling (2x Delta BFB0412HHA-A), 500Hz PWM
M106 P0 S0 H-1									; Set Fan0 to default off, manual control

; Fan1 = Hotend
M950 F1 C"fan1" Q500								; Define Fan1 for Hotend cooling, 500Hz PWM
M106 P1 S1 H1 T45								; Set Fan1 to Thermostatic control, max RPM at 45C

; Fan2 = MotherBoard Cooling
;----MCU & DRIVERS sensors------
M308 S3 Y"mcu-temp"	A"MCU"								; create sensor for MCU temp M308 S3 Y"mcutemp"
M308 S4 Y"drivers"	A"Drivers"							; create sensor for drivers temp M308 S4 Y"drivers"
M912 P0 S-0.8                                           ; Calibrate MCU temp
M950 F2 C"fan2" Q500									; create fan 2 on pin out4 - alternative with tacho M950 F2 C"!fan2+^pb6"
M106 P2 H3:4 L.3 B.5 X1 T40:65 					; Set fan 2 PWR fan. Turns on when MCU temperature, hits 45C and full when the MCU temperature reaches 65C or any TMC2660 alarms

; Tools
M200 D1.75
M563 P0 S"T0" D0 H1 F0                                  ; 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

; Additional Settings
M404 N1.75									; Define filament diameter for print monitor
M207 S0.85 R0 F2400 Z0								; Firmware retraction
M592 D0 A0.00458969993360082 B0.000458590610785138  ;PETG @235ºC 0.6 nozzle
M572 D0 S0.11									; Pressure Advance

; LCD
M575 P1 S0 B57600								; Set Baudrate to 57600

; LED´s life
M950 S0 C"^exp.heater3"                                 ; Leds life
;M950 F3 C"exp.heater3" Q500              ;Define heater5 as an input/output pin
;M106 P3 C"Led Light" S0 H-1	


; Miscellaneous
;G29 S1										; Load bed mesh
;M376 H4									; Mesh bed compensation. Height must be set to at least 20x the maximum error in the height map (max 5%)
M911 S23 R24 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000"      ; set voltage thresholds and actions to run on power loss
T0										; Select first tool (Extruder 0)
M501

M98 P"0:/macros/07-LEDS/05_Brillo 25%" 
G4 S10
M98 P"0:/macros/07-LEDS/23_Sparkle"
G4 S10

https://imgur.com/a/MFatSX0

I have tried with and withoy stock predator mosfet, from bedheat and from e1heat, nothing changes...

Phaedrux

Have you tried altering the PWM frequency of your M950 S0 C"^exp.heater3" command?

T3P3Tony

@apak as a test can you try using bang bang mode on the heated bed to see if it is actually the PWM signal (and not, for example a power supply related issue).

apak

@t3p3tony already tryed, also changing pwm frequency

T3P3Tony

@apak what was the result of using bang bang?

apak

@t3p3tony same

dc42

@apak how are you powering the Duet and the Arduino? Where are the grounds connected together?My guess is that it is a ground noise issue.

T3P3Tony

@apak if its the same with bang bang then its not PWM related. What is the difference when the bed heater is on with bang bang and off?

apak

@dc42

I did it like this

should I connect grond from the 24PSU to the 5V psu???

apak

@t3p3tony but only happens with the bed, not with the hotend¿?¿?

cosmowave

@apak said in problems with M280 P0 when heated bed active:

should I connect grond from the 24PSU to the 5V psu???

Yes, then the two systems are on the same potential.

dc42

Looks to me that they are already connected, through the black wire between the Arduino and the Duet.

apak

@dc42 actually there is one wire from 5vPSU GND to arduino and another from duet exp.gnd to arduino..

T3P3Tony

@apak which is why @dc42 is investigating a power issue.