Hello Dear Support team,
It seemed I didn’t have beginners luck. The LED light upon printhead only lights up sometimes when I move the printhead manually. I’ve been checked all the cables and connections make sure that I put everything right. But since the light didn’t light up mean that the temperature sensor didn’t work normally and I can not even load the filament.
What could be wrong?
Thanks a lot for all the replies!
It looks like you only have one print head installed.
Out of the box the firmware that is loaded is for two print heads.
You will need to load the firmware for the single print head.
If you look at the display you should see the temp for both one should be reading room temp the other will be at 0.
Also when loading the firmware it is important that you DO NOT have the printer plugged in to the wall.
You can find the firmware in this link.
https://www.vellemanusa.com/support/downloads/?code=K8400
The instructions are here
https://manuals.velleman.eu/article.php?id=31
Hey Wrong _way
I did upload the firmware for one printhead and of curse didn’t forget to reload the EEPROM settings. But the LED light still didn’t light up and printhead remained in auto-home position. As the picture showed, while fans are running the temperature is not rising(half hours later still the same:\ ).
Maby I should consider a hardware malfunction? Otherwise I have no problems in controlling the movements of printhead through LCD.
This is good picture.
From what I can see is you have a Min temp error.
This means that the thermistor is open (bad connection)
The wires to the thermistor are in the center poles of the green connector.
To check the thermistor disconnect the wires and check the resistance of the wires.
At room temp there should be around 100K ohms of resistance.
If it is open the thermistor may have been damaged or is defective.
If it checks out the quick and easy way to check the wires going to the mother board would be is to unplug the printer put a jumper across the connections (green) across for the thermistor. power the printer on if the error changes to MAXTEMP the wires should be ok.
Thanks for your tips!
Wires are ok because when I put a jumper across the connections (motherboard) the error did changed to MEXTEMP. So I check the connector in printhead again and found out that one of the connectors are stick by glue because I used 3-second glue to make wires attached to connectors, but it flowed somehow accidentally into connector …
If that’s the issue, can I connect the thermistor to the poles for printhead2 instead? or I have no options but change the connector?
