Extruder set point limited to 270c

[CarlBosson]

I have a custom printer with a Duet wi-fi board installed. I have added the expansion Pt-100 board to print at high temp. I have printed CF PEEK in the past at 400c at the nozzle. But it has been a year or so since I printed at these temps. Today I was heating up to print Ultem 1010 380c but the nozzle temperature stops at 270c. Please see below the version information and the code in the System editor/ config.g/ heaters. Thank you in advance for any help you can offer. Have a great day.

Carl

Firmware Name: RepRapFirmware for Duet 2 WiFi/Ethernet
Firmware Electronics: Duet WiFi 1.02 or later
Firmware Version: 2.05.1 (2020-02-09b1)
WiFi Server Version: 1.21
Web Interface Version: 1.22.6
Web Interface by Christian Hammacher
Licensed under the terms of the GPL v3

; Heaters
M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S200 ; Set temperature limit for heater 0 to 200C
M305 P1 X200 ; Set to Pt-100 sensor
M143 H1 S475 ; Set temperature limit for heater 1 to 475C
M305 P2 X200 ;Set to Pt-100 sensor
M143 H2 S200 ;Set temperature limit to 200c

[jay_s_uk]

@CarlBosson can you post your full config.g?
Also post the output of M98 P"config.g"
You also may want to consider updating from RRF2 to RRF3 https://docs.duet3d.com/en/User_manual/RepRapFirmware/Migration_RRF2_to_RRF3

[droftarts]

@CarlBosson Does it generate a temperature or heater error? What are the active and standby temperatures you are setting? Maybe the tool isn't selected and 270C is the standby temperature? If you watch the temperature graph, does it struggle to get to 270C (would indicate a voltage/current issue), or does it go straight up to 270 and hold that temperature?

Ian

[CarlBosson]

@jay_s_uk

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Sun Jun 16 2019 12:25:24 GMT-0400 (Eastern Daylight Time)

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

; Network
M550 P"My Printer" ; Set machine name
M552 S1 ; Enable network
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S1 ; Physical drive 0 goes forwards
M569 P1 S1 ; Physical drive 1 goes forwards
M569 P2 S0 ; Physical drive 2 goes forwards
M569 P3 S0 ; Physical drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80.58 Y80.58 Z400.00 E799.53 ; Set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; Set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; Set accelerations (mm/s^2)
M906 X1450.00 Y1450.00 Z1450.00 E1450.00 I30 ; 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 X300 Y300 Z400 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 Z1 S0 ; Set active low and disabled endstops

; Z-Probe
M558 P1 H5 F120 T6000 ; Set Z probe type to unmodulated and the dive height + speeds
G31 P500 X0 Y0 Z2.5 ; Set Z probe trigger value, offset and trigger height
M557 X15:6 Y15:195 S20 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S200 ; Set temperature limit for heater 0 to 200C
M305 P1 X200 ; Set to Pt-100 sensor
M143 H1 S475 ; Set temperature limit for heater 1 to 475C
M305 P2 X200 ;Set to Pt-100 sensor
M143 H2 S200 ;Set temperature limit to 200c

; Fans
M106 P0 S1 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

; 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 S21.0 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ;Set voltage threasholds and actions to run on power loss
; Custom settings are not configured

[CarlBosson]

@droftarts

Ian,
There is no error and I did not have a standby temperature selected so that value was set to zero. the temperature climbs rapidly to about 250c then slowly levels out at 270c. Another interesting thing just happened. The first time I tried to heat up to 380c it leveled out at 300c the second time at 270c the third time at 250c. I have not tried again as I was waiting for feedback. Thank you for your help.

Carl

[jay_s_uk]

@CarlBosson you seem to be defining the same X200 PT100 to heater 1 and then again to heater 2. I think that's causing an issue. Could you try commenting out the 2 lines for H2?

[CarlBosson]

@jay_s_uk
Please understand I am not the code expert all this has been done with help from this fourm. I thought M143 H1 was for the extruder, and M143 H2 was for the heated bed? But I will absolutely do as you suggest.
"Could you try commenting out the 2 lines for H2?" Do you mean remove these lines of code?

[jay_s_uk]

@CarlBosson said in Extruder set point limited to 270c:

; Heaters
M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S200 ; Set temperature limit for heater 0 to 200C
M305 P1 X200 ; Set to Pt-100 sensor
M143 H1 S475 ; Set temperature limit for heater 1 to 475C
M305 P2 X200 ;Set to Pt-100 sensor
M143 H2 S200 ;Set temperature limit to 200c

you seem to have 2 hotends defined (H1 and H2) but only 1 assigned to a tool.

comment out these 2 lines by adding a ;

M305 P2 X200					;Set to Pt-100 sensor
M143 H2 S200					;Set temperature limit to 200c```

[CarlBosson]

@jay_s_uk
I have never seen a heating element fail in this manor before, but it looks like I let some of the smoke out. I will have replacement elements today and will replace tommrow. Once this is done I will report back. Thank you for your help.

Carl

[CarlBosson]

@jay_s_uk
It turns out, I have still never seen a heating element fail in this manor. The problem was a loose connection. I have a small two pole screw terminal connecting the heating element in the hot end back to the control board. As I began to disassemble the hot end I found the loose terminal connection. It is heating and controlling as it should at 400 deg. C. You can mark this one solved! Thanks for all the help.

Carl