at 1st i thought i had a clogged nozzle after fiddling with it for a bit i now realize the hot end on my BIQU B1 is not heating and reads on the screen is stuck as -14 … while trouble shooting what i thought was a clogged nozzle the bed was heating up but now i get no heat… what might cause the hot end and the bed to no heat up?
The bed semes to have sorted itself getting heat…but still no head to nozzle…the screen reading temperature at -14 still
Make sure all your connections are tight. When a heating element or thermistor “seems to have sorted itself” that’s almost a sure sign of a loose connector.
on the B1 the thermister has another connection inside the print head on a little board inside. the wires in there are routed very tightly and if you disturb them you can disconnect one easily. it’ll give you those kinds of readings if it.s not connected or has a broken wire. Also Where the thermister is in the heater block there is a screw that’s supposed to hold it in its hole, it is clamping on the wires and could be another pint of failure.
Turned checked the connections again and got it to heat up now so yay one thing down… this all started with trying to get it to extrud…printer was working fine till today…it will heat up and the extruder is trying but no filament out the hot end even if I try and push the filament manually nothing I checked multiple times mo clogged.
Yea its heating up now after being off for a few hours…now to get it to extrud…even when heated I can’t get filament out the hot end. And check not seeing a clog
Can you pull the filament back out when the hot end is hot? I’m really going to leave this one to someone more familiar with the BIQU B2 hot end as I don’t know how it’s structured. What I refer to here is based on an Ender 5Pro hot end so there may be some differences.
If the filament was allowed at some point to heat up enough, it can melt all the way up to the Bowden tube and form a ball of filament that binds it in the tube itself.
If that’s the case, you’ll have to pull the Bowden Tube out, carefully heat the end of it with a match or similar heat source until the ball melts and pull the filament out.
If the filament can be pulled out but not pushed in such that it extrudes, Try doing a cold pull:
- Disconnect the Bowden tube from the hot end.
- Heat the hot end to PLA temperatures (250C)
- Turn the heat off and slowly push fresh PLA into the hot end while the hot end cools. The idea here is to create a plug of PLA that gets into every nook and cranny so it binds with any leftover filament or debris from previous prints. You can stop pushing on the PLA when the temperature drops below 160C. Let it cool to room temperature.
- Turn the heat on and begin gently but firmly pulling on the PLA. The first part of the PLA to melt will be the portions in contact with the metal. As soon as that liquefies, the PLA plug should come out with any impurities sealed within it. That should remove the clog. You can turn the heat off.
- There is another possibility. The Bowden tube is supposed to be cut at 90 degrees so that when it sits in the hot end, it creates a smooth transition for the filament from the Bowden tube to the hot end internals. If the Bowden tube is cut at an angle, or if it isn’t inserted all the way in, the filament will encounter the gap between the tube and the next part of the hot end and might get caught on the edge exposed by the gap.
Went to try that this morning but I couldn’t get the filament out it was even after taking the coupler and the Bowden tube out …ibook the hot end out too was eventually able the get it out
There seems to be something stick residue on the filament. I have a Bowden tube cutter to get the degree angles some of the residue that is sticking seems to be on the end of my Bowden tube as well
Usually the end of the bowden. Tube needs to be trimmed because the ends melted. Thers a procedure in steps to putting it back. Basically leave the top coupler loose 1/2turn or so, push it in had then tighten the coupler. Did you have the nozzle off?