Ok I figured out what was wrong. I am an idiot that's what. I inadvertently set the hot end PID parameters as the Bed Parameters in the config.g file.

Ok I figured out what was wrong. I am an idiot that's what. I inadvertently set the hot end PID parameters as the Bed Parameters in the config.g file.

OK so with my bed removed and carefully placed on the side but still fully connected I can see that the light on the duet comes on and the light on the SSR comes on for a short time then the error occurs and they both go out so I think this is either a fault with the Duet or with the configuration maybe but as nothing has changed in the configuration I am unsure why it should suddenly start behaving this way. I have checked all the connections are still good and tight . I am unsure how it determines that the temperature should rise at 1.7°C/sec.

Error: Heating fault on heater 0, temperature rising much more slowly than the expected 1.7°C/sec

So a few days ago I posted that I was seeing hot end temperatures about 25°C high at idle and that after taking some bits apart and putting it back together that it seemed to be working. Shortly after I started to get the above error when the bed has reached about 30°C.

I checked the silicone heater and it seemed to only be getting warm in one spot so I assumed that it was faulty and I have procured a replacement but now that the replacement in in place the error persists.

My configuration for the Bed is

M305 P0 T100000 B3950 R4700 H-20 L0

but this has not changed since I started using it.

My Printer uses a mains voltage heater through an SSR. I do not really know how to troubleshoot whether it is the duet, SSR or Power Supply that is at fault but I am assuming the PS is ok. I am open to suggested troubleshooting methods.

And now that I put it all back together its reading 30°C which is only about 3°C high compared to the bed temperature. Maybe a bit or tarnish on the connector or something, I will keep an eye on it.

OK so on my system it is easy to disconnect the pt100 and so I measured the resistance and it is sitting at 111ohms which is right about where I would expect it for the current temperature. I have found a 100ohm resistor and when plugged in in place of the pt100 it reads 2.6°C which probably accounts for the wiring between the effector and the board which is about 1.6m. So now I am stumped as they both seem pretty close to what they should be.

Today I was printing with PETG @ 240°C and was getting no bed or layer adhesion so I stopped printing and had tea and when I came back and switched the printer on I noticed that the heater temperature was showing 52°C when it was more like 26°C or 28°C in the room.

How can I correct this error or is it a case of one of the components has gone.

I am using:

Duet 0.8.5
E3D V6 with Copper Heat Block
PT100 with MAX31865

Which is most likely to be the culprit and how do I narrow it down? If I put a 100ohm resistor in place of the PT 100 it should show 0°C and if I put around 140ohms it should show over 100°C right? if it shows correctly that would point to the PT100 or I guess I could just measure the resistance of the PT100 but I don't know what resistance it should show at 26°C but I reckon it should be about 110ohms.

@deckingman @appjaws @dc42 Thanks all, I think between all this there is something I can use.

I will look at the macros tomorrow. In the mean time my PrintBite has a bubble under it now for some reason after 4 years of use so I have to take it off and reapply it so a night of removing adhesive is on the cards.

@deckingman

So does it matter what the file extension of the macro is? Do you upload the macros to the printer?

@deckingman

So how do you deal with all the differing Print and bad temperatures? Do you specifically call the macro in the Slicer profile and have a different on in config.g for each scenario? I only ever use Simplify3D so I am not specifically bothered about it being slicer agnostic but if it is easier then I am all for it.

I would like to at least try your solutions so if you would share the macros that would be good.

@Phaedrux said in Setting Print and Bed temperatures in start code:

Do you have two tools, or just one?

Just the one.

@Phaedrux said in Setting Print and Bed temperatures in start code:

P refers to the tool.

So P0 is correct as I only have 1 tool?

@Phaedrux said in Setting Print and Bed temperatures in start code:

Are you sure {print_temperature} is the correct variable format for S3D?

No, I am sure of nothing but I think it used to work. I should RTM I guess.

@Phaedrux said in Setting Print and Bed temperatures in start code:

Are you able to modify that section to have a T0 at the start of it?

In Simplify3D in the Temperature Tab you can select the Temperature Identifier but the BED is T0 and the extruder is T1 I think but then you also select the Temperature Contoller Type of Extruder or Heated Bed so maybe that identifies it and it should be T0 for both. I really don't know, I was hoping someone else did.

@Phaedrux said in Setting Print and Bed temperatures in start code:

Do you have a T0 at the end of your config.g?

Yes, this is my config.g

; Configuration file for Duet 0.8.5 (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Fri Feb 21 2020 19:36:19 GMT+0000 (Greenwich Mean Time)

; General preferences
G21                                 		; Work in millimetres
G90                                         ; send absolute coordinates...
M83                                         ; ...but relative extruder moves
M550 P"The BFK"                             ; set printer name
M551 P"reprap"                        		; Machine password (used for FTP)
M555 P2                             		; Set output to look like Marlin
M665 R171 L360 B150 H468.5                  ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0                               ; put your endstop adjustments here, or let auto calibration find them


; Network
M540 PBE:EF:DE:AD:FE:EC                     ; set custom MAC address
M552 P192.168.1.12 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 S1                                  ; enable FTP
M586 P2 S1                                  ; enable Telnet

; Drives
M569 P0 S1                                  ; physical drive 0 goes forwards
M569 P1 S1                                  ; physical drive 1 goes forwards
M569 P2 S1                                  ; physical drive 2 goes forwards
M569 P3 S1                                  ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                            ; set drive mapping
M92 X160.00 Y160.00 Z160.00 E3800.00        ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E0.1        ; set maximum instantaneous speed changes (mm/min)
M203 X21000.00 Y21000.00 Z21000.00 E3600.00 ; set maximum speeds (mm/min)
M201 X2000.00 Y2000.00 Z2000.00 E100.00     ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E800 I30             ; set motor currents (mA) and motor idle factor in per cent (Maybe Remove I30?)
M84 S30                                     ; Set idle timeout (Maybe Remove This?)

; Axis Limits
M208 Z-0.1 S1                               ; set minimum Z

; Endstops
M574 X2 Y2 Z2 S1                            ; set active high endstops

; Z-Probe
M558 P8 R0.4 H5 F1200 T3600                 ; set Z probe type to effector and the dive height + speeds
G31 P100 X0 Y0 Z-0.1                        ; set Z probe trigger value, offset and trigger height
M557 R150 S25                               ; define mesh grid

; Heaters
M305 P0 T100000 B3950 R4700 H-20 L0   	    ; set thermistor + ADC parameters for heater 0
M143 H0 S160                                ; set temperature limit for heater 0 to 160C
M305 P1 X200                                ; configure PT100 for heater 1
M143 H1 S285                                ; set temperature limit for heater 1 to 285C
M570 H1 P10 T20 S180			    ; Hot end may be a little slow to heat up so allow it 180 seconds

; Fans
M106 P0 S0 I0 F500 H-1                      ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H-1                      ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off

; Tools
M563 P0 D0 H1 F0 S"Hot End"                 ; define tool 0 (Maybe Remove F0?)
G10 P0 X0 Y0 Z0                             ; set tool 0 axis offsets
G10 P0 R0 S0                                ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
;M501                                       ; load saved parameters from non-volatile memory (I commented this out)
T0                                          ; select first tool