RRF3 several issues

Cecil

Hi,

Yesterday I started to modify my machine to RRF3. I found several issues during configuration.

1.) Heater config
In wiki are heater outputs listed as inverted, so I activated them through M950 as inverted... Few minutes after booting I started to smell plastic melting - temperature of hotend was according to thermistor >800C! No warning, nothing - even if I have had configured max temp for that heater to 300C. It looks like thermal runaway protection is not working.

2.) Z homing with probe - I was used to do in RRF2 "G1 Z-215 F720 H1" to quickly go close to bed, after that raise a little bit and do G30. In RRF3 is probe not working as an endstop - or I am not able to configure it. Is it possible to use it in same way like in RRF2, or should I now just use G30 instead and wait for slow probing all the way down if gantry is all the way up?

Board: Duet Maestro 1.0
Firmware: RepRapFirmware for Duet 2 Maestro 3.0alpha (2019-08-21b2)

My config.g and homez.g below

; Configuration file for Duet Maestro (firmware version 1.20 or newer)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Sun Jun 03 2018 17:10:41 GMT+0200 (Central Europe Daylight Time)

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

; Network
M550 PMy printer                                   ; Set machine name
M552 P192.168.1.32 S1                              ; Enable network and set IP address
M553 P255.255.255.0                                ; Set netmask
M554 P192.168.1.1                                  ; Set gateway
M586 P0 S1                                         ; Enable HTTP
M586 P1 S0                                         ; Disable FTP
M586 P2 S0                                         ; Disable Telnet

; Drives
M584 X0 Y1 Z2:4 E3 U5 V6			   ; U=filament chooser mmu, V=filament feeder mmu
M671 X-40:290 Y0:0 S2 				   ; leadscews
M569 P0 S1                                         ; Drive X goes forwards
M569 P1 S1                                         ; Drive Y goes forwards
M569 P2 S1                                         ; Drive Z goes forwards
M569 P3 S0                                         ; Drive E goes backwards
M569 P4 S1                                         ; Drive Z goes forwards
M569 P5 S0					   ; Drive U goes backwards
M569 P6 S1					   ; Drive V goes forwards
M350 X16 Y16 Z16 E64 U32 V32 I1			   ; Microstepping with interpolation
M92 X100 Y100 Z400 E579.5,579.5,579.5,579.5 U400 V400	; Set steps per mm
M566 X300 Y300 Z60 E120 U60 V60                    ; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z720 E7200 U720 V720            ; Set maximum speeds (mm/min)
M201 X1500 Y1500 Z200 E5000 U200 V200              ; Set accelerations (mm/s^2)
M204 P1250 T2500				   ; Set printing and travel accelerations limit
M906 X1000 Y1000 Z500 E700 I30                     ; Set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout

; Axis Limits
M208 X0 Y-5 Z0 S1                                  ; Set axis minima
M208 X250 Y210 Z210 S0                             ; Set axis maxima

; Endstops
M574 X1 S0 P"xstop"				   ; X endstop low side
M574 Y1 S0 P"ystop"                                ; Y endstop low side
M574 U1 S0 P"e0stop"				   ; U endstop low side

; Z-Probe
M574 Z0 P"nil"					   ; free Z endstop
M574 Z1 S2 P"zprobe.in"                            ; Set endstop controlled by probe
M558 P1 C"zprobe.in" I1 H0.3 A3 F300 T12000 S0.02  ; Set Z probe type to unmodulated and the dive height + speeds
G31 P500 X25 Y-2.9 Z1.8                            ; Set Z probe trigger value, offset and trigger height
M557 X30:228 Y5:203 S33                            ; Define mesh grid

; Heaters
;M305 P0 T100000 B4725 C0 R2200                    ; Set thermistor + ADC parameters for heater 0
M308 S0 P"bedtemp" Y"thermistor" A"Bed temp" T100000 B4725 C0 R2200 ; Set thermistor + ADC parameters for heater 0
M950 H0 C"bedheat" T0				   ; Create bed heater uninverted as heater 0 using thermistor 0
M143 H0 S120                                       ; Set temperature limit for heater 0 to 120C
;M305 P1 T98130 B4000 R2200                        ; Set thermistor + ADC parameters for heater 1
M308 S1 P"e0temp" Y"thermistor" A"Extruder temp" T98130 B4000 R2200 ; Set thermistor + ADC parameters for heater 1
M950 H1 C"e0heat" T1				   ; Create hotend heater uninverted as heater 1 using thermistor 1
M143 H1 S300                                       ; Set temperature limit for heater 1 to 300C

; Fans
M106 P0 S0 H-1                             	   ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S0 H-1                             	   ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S0 H-1                             	   ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

; Tools
M563 P0 D0 H1                                      ; 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

; Automatic power saving
M911 S20.0 R30.0 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Pressure advance
M572 D0 S0.15

;Extruder ehater PID
M307 H1 A1049 C299.5 D8.1 B0 S0.5

;Bed heater PID
M307 H0 A119.8 C480.4 D8.5 V23.9 B0

;extruder non-linearity
M592 D0 A-0.004104 B0.003347

;initialize display
M918 P1

;filament sensor
M591 P1 C"zstop" S1

;filament sensor at mmu
M581 P"e1stop" T2 C0

;servo at mmu
M950 S0 C"servo"

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool on Sun Jun 03 2018 17:10:41 GMT+0200 (Central Europe Daylight Time)
G91               ; relative positioning
G1 Z5 F6000 H2    ; lift Z relative to current position
G90               ; absolute positioning
G1 X5 Y7.9 F6000 ; go to first probe point
G91               ; relative positioning
;G1 Z-215 F720 H1 ; move quickly to Z axis endstop and stop there (first pass)
;G1 Z2 F720       ; go back a few mm
G90               ; absolute positioning
G30               ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G90              ; relative positioning
;G1 Z2 F900 S2    ; lift Z relative to current position

Cecil

Today I have made test so I configured it throu console as inverted to see what will happen after going above 300C...
Heater above 300C

JoergS5

This post is deleted!

dc42

@cecil said in RRF3 several issues:

In wiki are heater outputs listed as inverted, so I activated them through M950 as inverted... Few minutes after booting I started to smell plastic melting - temperature of hotend was according to thermistor >800C! No warning, nothing - even if I have had configured max temp for that heater to 300C. It looks like thermal runaway protection is not working.

The ! character means invert the usual sense. The additional heater outputs on the expansion connector are active low, so if you were using one of those as GPIO and wanted an active high output, then you would use the ! character to specify inversion in firmware. Thermal runaway protection can't work if the heater is on when the firmware is commanding it it to be off. Is there a particular part of the documentation that you feel misled you into using the ! character?

@cecil said in RRF3 several issues:

Z homing with probe - I was used to do in RRF2 "G1 Z-215 F720 H1" to quickly go close to bed, after that raise a little bit and do G30. In RRF3 is probe not working as an endstop - or I am not able to configure it. Is it possible to use it in same way like in RRF2, or should I now just use G30 instead and wait for slow probing all the way down if gantry is all the way up?

It has always been incorrect to treat the Z probe as an endstop. You can use the M558 F parameter to change the probing speed, and thereby do fast-then-slow probing.

gtj0

@dc42 said in RRF3 several issues:

Is there a particular part of the documentation that you feel misled you into using the ! character?

The example for pin names shows the !. I thought that was odd.

https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Pin_names_for_Duet_2_WiFi_Ethernet

Pin names for Duet 2 WiFi/Ethernet

Multiple names on a line are aliases for a single pin. An exclamation mark before the pin name
means that there is inversion between the processor and the corresponding output, and that
RRF3 will automatically allow for this inversion.

// Duet 2 and DueX heater outputs

!bedheat
!e0heat
!e1heat

Cecil

@dc42 said in RRF3 several issues:

The ! character means invert the usual sense. The additional heater outputs on the expansion connector are active low, so if you were using one of those as GPIO and wanted an active high output, then you would use the ! character to specify inversion in firmware. Thermal runaway protection can't work if the heater is on when the firmware is commanding it it to be off. Is there a particular part of the documentation that you feel misled you into using the ! character?

In section "Pin names" in wiki post to RRF3 are all pin names listed without explanation mark but heaters are with. I was misled by it. I thought I should use it by default as it is stated in that list.
Now I know my extruder will survive thermal abuse. Who have extruder which can handle 800C?

It has always been incorrect to treat the Z probe as an endstop. You can use the M558 F parameter to change the probing speed, and thereby do fast-then-slow probing.

You mean something like changing M558 parameters on the fly during homing? That can work! Thanks

deckingman

@cecil said in RRF3 several issues:

You mean something like changing M558 parameters on the fly during homing? That can work! Thanks

Exactly so. For info, this is an extract from one of my homing macros...........

;change to faster probing speed
M558 F450
G30 ; FAST home Z using values from G31

G91 ;relative
G1 Z5 F300 ; lower bed 5mm
G90 ;absolute

;change back to slower probing speed
M558 F180
G30 ; SLOW home Z