No voltage on Extruder Hot end?

[droftarts]

@akds48 Okay, it looks like the configuration is correct for RRF v3. Tools appear to be configured correctly. Can you post an image of what you see in DWC?

Ian

[Akds48]

@droftarts
i am not using DWC, right now i am controlling the machine with proterface and Simplify3D.

and iam getting a open circuit error on terminal while i have connected all the things properly.

[droftarts]

@akds48 Troubleshooting will be a lot easier if you use DWC; you can see much more information. You can follow the guide here to get connected: https://docs.duet3d.com/en/How_to_guides/Getting_connected/Getting_connected_to_your_Duet

Can you measure the resistance of the thermistors at room temperature, at the connector that plugs into the Duet? Are you sure you have two Volacano extruders?

I assume you downloaded the configuration from 3D Platform? https://support.3dplatform.com/portal/en/kb/3d-platform/200-300-series

Ian

[Akds48]

@droftarts

No right now i am using single extruder, actually when i run the command for heating the extruder, it shows the target temp for 2 seconds only then it shows -273 as above.
and when i checked the resistance at the point of thermistor it shows 0 value there.

and yes i downloaded the firmware from 3DP support.

[droftarts]

@akds48 Sounds like the thermistor has failed, or the wiring is broken or disconnected. At room temperature (25C), the resistance should be 100,000 ohms, at least according to the config you are using:

; LEFT EXTRUDER
M308 S1 P"e0_temp" Y"thermistor" A"Volcano" T100000 B4725 C7.06e-8 ; set thermistor values for Volcano
M950 H1 T1 C"e0_heat"                           ; set heater 2 to use temp 2
M307 H1 A547.2 C279.0 D4.4 S1.00 V23.1 B0       ; set heater control values for Volcano left
M143 H1 S300                                    ; set max temp: 300C
M563 P0 D0 H1 S"Left extruder" F0:1             ; Define tool 1
G10 P0 R0 S0                                    ; Set initial tool 1 active and standby temperatures to 0C
G10 P0 X0 Y0 Z0                                 ; Set initial tool offsets to 0 (will be over-ridden)

; RIGHT EXTRUDER
M308 S2 P"e1_temp" Y"thermistor" A"Volcano" T100000 B4725 C7.06e-8 ; set thermistor values for Volcano
M950 H2 T2 C"e1_heat"                           ; set heater 2 to use temp 2
M307 H2 A547.2 C279.0 D4.4 S1.00 V23.1 B0       ; set heater control values for Volcano right
M143 H2 S300                                    ; set max temp: 300C
M563 P1 D1 H2 S"Right extruder" F0:1            ; Define tool 1
G10 P1 R0 S0                                    ; Set initial tool 1 active and standby temperatures to 0C
G10 P1 X0 Y0 Z0                                 ; Set initial tool offsets to 0 (will be over-ridden)

Ian

[Akds48]

@droftarts
okay i will change the thermistor if it can be a problem.

[droftarts]

@akds48 does anything work at the extruder/hot end? Fans, or extruder motor (if you allow cold extrusion)? Maybe a wiring fault at that end?

Ian

[Akds48]

@droftarts
only fan is working neither the motor nor the heater or thermistor.

[jay_s_uk]

@akds48 i'm not sure e0_temp is valid as a name. try e0temp. same for the other ones with a _

[Akds48]

@jay_s_uk
It is a default firmware which i am using from 3D platform to operate the machine.

[droftarts]

@jay_s_uk said in No voltage on Extruder Hot end?:

@akds48 i'm not sure e0_temp is valid as a name. try e0temp. same for the other ones with a _

It's fine:

A pin name is a string of characters enclosed in double quotation marks. It is not case sensitive. All instances of _ and - characters are stripped from pin names before comparing them.

https://docs.duet3d.com/User_manual/RepRapFirmware/Migration_RRF2_to_RRF3#pin-names

Ian

[Akds48]

@droftarts
i have changed the thermistor but it is same again.
could it be a VSSA fuse problem? as i have lower version of duet board and it has no fuse !

i have the first one board which has not fuse for thermistor, bed or fan.

[droftarts]

@akds48 The large fuses are not the VSSA fuse, they are for heated bed, and fans/stepper motors/hot end heaters. From on of your earlier pictures, you have a v1.02 board, which means the VSSA fuse is resettable, so it shouldn't be causing a problem. (See https://docs.duet3d.com/Duet3D_hardware/Duet_2_family/Duet_2_WiFi_Ethernet_Hardware_Overview#pcb-revision-history)

VSSA fuse problems were confined to v1.0 and v1.01 board, see https://docs.duet3d.com/en/User_manual/Troubleshooting/Parts#vssa-fuse

I think you need to test the thermistor inputs. The easiest way to do this it to get a known-value resistor, and connect it directly to the thermistor pins, and see if the correct temperature is reported. I use these for testing:

Ian