Hi,
I fully understand Bambulabs is short handed so while I wait for my ticket to be responded to wanted to see if anyone has any pointer on what I might do for my printer issue
i’ve had my X1 Carbon + AMS for about 3 weeks and it’s been printing beautifully. untill. i started get lidar messages about the lens being dirty, then I started getting cutter errors. when I last went to deal with the cutter error i noticed the logon on the print head was off (rest of printer was on)
the printer is on a UPS to protect it from power issues but I don’t think we’ve had any
took a look and the hot end was cooled off. i checked connections to the head and they seem ok. but its dead, self test stops at trying to set the hot end temp which it does not do.
been waiting on support since wednesday now.
I’m thinking this is board failure somewhere and I’m not happy since its a fairly new printer and happens to be complicated by staff shortage
does anyone have any idea what I might check?
are there any fuses anywhere that might have blown maybe?
The Nozzle shows a temp of 17c for a few minutes then drops to 0c , Room temp is 20c
Part fan will not turn on, the Bambo Logo is no lit.
I do have a complete hot end assembly 0.4mm harden steel.
Assuming you’re going to suggest to me to replace it,
my question would be there’s filament stuck in the nozzle and extruder, how should I remove the existing hotend?
So the worst thing happened in my opinion.
I went and check to answer your question and when i powered the printer on the temp was reading normal, fan responded, so I ran the self test and it passed, I was not able to do that.
the logo light is back on, got a Lidar lens dirty message, cleaned the lens
ran a fresh calibration re-attached the AMS and have it printing the part if failed on.
why is this bad?
I don’t know why it failed in the first place so could fail again in ht the middle of the print.
this part is about a 3hr print so will see what happens, I’ll update my support ticket as well but I do want thier help to see if we can figure out what happened
Pop the cover off and inspect the wiring from the hotend to the board
It is a very snug fit for all of the wiring back there, the heatbreak fan wires in particular are very stiff so you’ll want to mske sure that they are routed nicely and if the wires are forward too much pushing against the cover manipulate them back and out of the way
The thermistor wiring is very fragile and the white JST plug that goes into the board is very small
Carefully unplug the thermistor plug from the board and make sure everything looks good then plug the thermistor back into the board taking care that it is in the correct position (not backwards) so that it is pushed fully into the board
This 100% sounds like your thermistor is acting up
As for the lidar even a smudge or small piece of filament hiding in there will cause lidar issues, be very observant in that area as stray materials can be hard to see
Like Jrock said you can inspect the connections or try another temp sensor would be the next step you can test it out with your other hot end with interment electronic failure you want to try to eliminate components.
The Bambu also has had intermittent problems with the usb-c cable the internal small wires break from all the bending it’s a good idea to have a backup USB-C Cable
Thanks for the input I will look at replacing the hotend (since I have one) and order some spare cables.
this is a curiosity question, would you know why the temp sensor would make it act this way but not give an error?
would it be wise to also have spare temp sensors?
i guess it couldn’t hurt and they are not expensive
i had a few instances since it started working where it said the cutter didn’t spring back which is where this really started, i was getting that message more and more frequently until the head to died.
Well you can see if it happens again or run you extra hot end to help eliminate the temp sensor error if it returns could have been a software bug also.
An open temp sensor should give an error code but sometimes depending on how the diagnostic programing software logic was done it can work or not. I have seen this with other applications. This is why we have software updates to help improve or fix problems.
Now you can start testing the diagnostic logic one easy way is to unhook the nozzle temp sensor and you should get the hard open temp sensor fault code but software can also run in order of steps so their can be other variables in play when a intermit temp sensor signal fails and is not picked up by the diagnostic logic program and then it stop things from working correctly.
The printer cutter lever inspect the lever they can crack if the blade gets dull also check the spring and arm is working smooth in and out with no binding from say some old filament in the cutter slot area.
Extra temp sensors you can for me I have extra hot ends so this is my backups sensors they are easy to remove from the hot ends if needed and just add some thermal paste.
