Hi my Vertex 8400 with 2 extrudes does not load filament in neither of them.
I have a max temp error on one showing 739/0 degrees the other 25/0
Please help!
Obviously there’s an issue with your left thermistor.
Did you load the latest (1.4) firmware for 2 extruders (with Arduino 1.0.x)?
Check the connections of the Thermistor (check if you didn’t swap the heater and the thermistor) on the Heater PCB.
Check the connector on the mother board for bad contact.
If everything is OK check the resistance of the thermistor (should be about 100K ohms). Swap the right thermistor with the left and check if the left temperature is OK.
[quote=“raby”]Obviously there’s an issue with your left thermistor.
Did you load the latest (1.4) firmware for 2 extruders (with Arduino 1.0.x)?
Check the connections of the Thermistor (check if you didn’t swap the heater and the thermistor) on the Heater PCB.
Check the connector on the mother board for bad contact.
If everything is OK check the resistance of the thermistor (should be about 100K ohms). Swap the right thermistor with the left and check if the left temperature is OK.[/quote]
Yes I did load the firmware with the correct arduino software and yeas I did reload the settings.
I did look at a posts on the heating and extrudes before I posted this message.
The resistance (unplugged at the circuit-board) on the heating components (is no resistance (open circuit) on heat sensors) a very strange phenom on the heaters, sometimes there is resistance sometimes it is broken open circuit.
Voltage on the heating output on the print-head when load is: 4,17 and 4,17 heat senors is 0V
Also homing and x-y-z movement works so the sensors and 3 motors work.
739C indicates a short on the thermistor.
As you are facing the printer the heater should be wired to the first connections the thermistor should be on the middle connections.
While everything is wired and the printer is unplugged set your meter for 200K ohms check the resistance across the middle green connectors for the left nozzle you should see around 100K ohms of resistance at room temp.
If you remove the wires from the middle connectors the temp should drop to 0C.
[quote=“Wrong Way”]739C indicates a short on the thermistor.
As you are facing the printer the heater should be wired to the first connections the thermistor should be on the middle connections.
While everything is wired and the printer is unplugged set your meter for 200K ohms check the resistance across the middle green connectors for the left nozzle you should see around 100K ohms of resistance at room temp.
If you remove the wires from the middle connectors the temp should drop to 0C.[/quote]
It does not measure these value’s at all, the thermistors are 0 ohm and the heaters 7 ohm when the printer is not powered.
Do I need new components? (heaters and thermistors)
Try unplugging the thermistor from the board and see if the temp goes to 0C
Yes it is now 0C when they are unplugged (both)
Check the wiring for the left thermistor.
The control board seems OK the thermistor has a short.
Make sure the wires for the thermistor are going into the center terminals.
The heater goes into the front terminals (as you are looking at the printer)
The fan (black and red) go to the rear terminals.
It seems that the thermistor is shorted. At room temperature it should have an resistance around 100K. So you have to replace it.
The resistance for the heater is in the typical range for this part.