Extruder will not heat

K8200 3D Printer K8200 - Issues while printing
1

i have build the 3d printer , motors are working, bed will heat but the extruder will not heat . Measred the wiring ; is oke. ntc thermo was measered oke
if i put the heating of the bed on heater 1 it will also heat

what can be the problem?

2

broken board ? short circuit with ntc & extruder ?

3

Is the software showing room temp for the extruder?

4

software shows room temp

5

If the bed heats up when connected to the heater port 1 the board looks ok.
Have you checked the heater element itself? Measure the resistence?
Could be a bad heater element. Or something wrong with the wires.

6

i am not real good with electronics . I cheqed the wires with the multimeter they are oke . If i measere the heater block {200 ohm] i get a value of 7. Ido not know if it is right. When i measere the ntc thermistor i get a value of 135 ,when i put it in the board i get a value of 6,5 [maybe that is normal}
Can i test the thermistor by putting the thermistor and heating block in heater 2 and therm 2 and heat op the bed?

7

Check for voltage at the wires of the extruder while it is on is on
The thermistor sounds like it is working

8

i cheqed by the wires of the extruder . it get 0 voltage ialso measered the bed that was 15 voltage

9

i measered the voltage . at the printboard it was 15 at the end of the wire it was zero ithink it must be the plug to the printboard that is wrong
cause imeasered te wires and they were good thank yoy
i will let you know if it is solved

10

I should have said this before
Check the voltage at the board
If you have voltage while the heater is unplugged the board should be OK
If you plug the heater to the board and the voltage drops to zero then the wiring may have a short
Does the led for the heater turn on?
Sorry it took so long to get back to you
The wife wanted doughnuts
Lol

11

changed the plug to the board and it works did not expect the plug to be wrong
do not give the wife to much donuts
thanks

12

Hello,

I have a similar problem as van zanten has with my K8200 (I bought & build it recently). What I have checked so far:

  • Temperature are shown correctly in repetier. They are both about the room temperature (21°C). So the conclusion of that is that the wiring with NTCs is correct.
  • Bed heater works as it should. LED on the board is on, repetier show the increasing temperature of the bed and the bed itself is hot.
  • The extruder is not heating at all and the temperature is about the room temperature. The LED on the board is off.
  • I changed plugs with extruder and bed. So I had extruder heater plug in bed heater and opposite. And of course the extruder thermal plug in bed heater and opposite. Then I turned the bed heater on and extruder started to heat up. Bed didn’t.

The conclusion: Perhaps the board is not okay? As to me it seems the wiring is ok. So what could be wrong with it? And what should I do about it?

13

does the bed “heat led” switch on if the bed is disconected?