High Temp Alarm?
While doing a print, 30 min later filament apparently poured out and create a mess. Filament buildup around the heating element and nozzle.
Per instructions, removed the fans and extruder cover to access the nozzle. set the nozzle temp to 200 degrees. Was able to remove the filament access.
Now I get the constant high temp alarm. Shut down printer for a few minutes. Power back on and still getting high temp alarm. See pic
what does this indicate?
RE: High Temp Alarm?
Did you use a wire brush?
If so you may have damaged the thermistor.
Otherwise the thermistor wires may be short circuit.
Unplug the thermistor. And see if you now get mintemp.
If so. The thermistor is probably faulty.
Regards Joan tabb
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: High Temp Alarm?
noooooooooooo did not use wire brush.
Once i removed the nozzle, i used a hair dryer to remove the filament from a totally clogged nozzle, then a wire brush to finish the cleaning. put the nozzle in acetone for a bit.
ok put everything back together and no temp alarm.
Printed for 5 mins then got the Err: maxtemp
Not surer where to go from here 😱
RE: High Temp Alarm?
Check the resistance of the thermistor, it should be 100 kohms at 25C
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: High Temp Alarm?
Not sure how to measure. Are there test point on the board?
Thankx
ron
RE: High Temp Alarm?
Disconnect the plug and test off the licking tabs for the pins
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: High Temp Alarm?
aaah i have seen a pic of the board thankx. But egadd, what rats nest of cable. I would have envisioned a better layout when i opened the cover.
thankx for you reply.
RE: High Temp Alarm?
Resistance is open circuit. using High dryer does not change resistance.
why would thermistor fail? High heat from filament buildup... very wierd
😱
RE: High Temp Alarm?
oops disregard last post. Thought i had the correct range selection on my ohm-meter. Getting a reading +100Kohm. so, looks like my thoughts of probable cause of bad thermistor seems to check ok.
RE: High Temp Alarm?
Well, cleaned up the filament, heated nozzle temp to 200 degrees so i can install nozzle again. Never reaches 200 degrees and get MaxTemp err at 739 degrees.
Wondering if the extruder thermistor is still the culprit even when i measured at 100+Kohms?
RE: High Temp Alarm?
Looks like the thermistor is now shorted.
Was going to purchase the thermistor from printedsolids. After talking to Dustin tech, im better off just replacing the preassembled hotend. Makes sense since the printer is at least 5 yrs old. Still a fantastic printer.
RE: High Temp Alarm?
Corrected issue.
Purchased pre-ssembled hot-end from Printedsolid.com.
installed and no issues now 😀 👍