RE: Core One: How does the side filament sensor work?
Absolutely yes, the side filament sensor should have stopped the print.
You may have noticed that the printer shows you the status of both the side sensor and the head sensor in the display. So you can verify that the sensors are working every time you add a new filament.
If your sensor is not working, perhaps you have the bolt a bit too tight on the lever arm? We have a lever arm, it is held apart with the magnets. When a filament is shoved in, it moves the level. The other side of the lever is between an IR sensor. The tip of the lever gets lifted out of the gap between the IR sensor - that changes the signal.
Should the side filament sensor have stopped the print?
RE: Core One: How does the side filament sensor work?
How do I know?
Cause I am printing the Lighthouse without Bench sample print. I just ran out of filament one hour ago. Yes, the printer stopped when the side filament sensed that I had run out of filament.
It was a bit difficult to swap the filament out because I accidentally broke of the tip of the filament that was sticking out. But we got it sorted and the print is continuing. Wow, just twelve more hours to go on this one !
Should the side filament sensor have stopped the print?
RE: Core One: How does the side filament sensor work?
That (a menu option) does not seem to be an option.
The printer menu seems to be set in the 'please change filament mode'. I did not see a 'unload the filament a bit so I can get to it'. Presumably the printer already automatically did that.
So I was also reduced to: opening the tensioner; removing the tube from the head; pulling out the filament; etc.
Was that after you let the printer "unload" the filament via the menu, i.e. let the extruder push the filament back?
RE: Core One: How does the side filament sensor work?
They do cover this in the instructions. I believe it is mentions to move the level manually to ensure it moves smoothly and is not binding anywhere.
They let you check that the lever moves freely while the lid of the sensor housing is still open. (Mainly confirming that you have not overtightened the pivot screw.) But the problem @marino-2 refers to will only manifest itself once you mount the lid:
The magnet inserted into the lever is a mm wider than the lever itself. If the magnet sticks out too far at the top, it will rub against the lid. Filament insertion may become more difficult, or the lever may get stuck in the "I see filament" position.
RE: Core One: How does the side filament sensor work?
They do cover this in the instructions. I believe it is mentions to move the level manually to ensure it moves smoothly and is not binding anywhere.
They let you check that the lever moves freely while the lid of the sensor housing is still open. (Mainly confirming that you have not overtightened the pivot screw.) But the problem @marino-2 refers to will only manifest itself once you mount the lid:
The magnet inserted into the lever is a mm wider than the lever itself. If the magnet sticks out too far at the top, it will rub against the lid. Filament insertion may become more difficult, or the lever may get stuck in the "I see filament" position.
Ah, OK. I did notice that when I was assembling the C1+ version. In hindsight though, should have stuck to what I had before.
It's an odd design to begin with. Especially since they could have used smaller (and weaker) magnets from the beginning which would have solved the issue with feeding in softer TPU's.
RE: Core One: How does the side filament sensor work?
Thank you for post as this is exactly what was wrong with my side sensor. My sensor was always on (INS) when looking at the side filament sensor (Info -> Sensor Info -> Side Filament sensor. ) The Side Filament sensor not the easiest thing to work on, but moving the magnet on the arm in more fixed it. Verified it several times as I reinstalled the sensor in the right side with the side handle. All is working including the switch to allow easier FLEX loading.
May be an obvious question to some, but I had a print that spanned multiple spools yesterday, and only the extruder sensor gave me the out of filament warning. I was able to swap the filament without issue, but it meant that I had to pull the PTFE tube quick release on the Extruder instead of pulling it out of the side insert.
Should the side filament sensor have stopped the print?
The side sensor passed the startup checks, but it is a kit build so possible that I did something wrong.
After I had built my kit, the side filament sensor got stuck in the "I see filament" position once I inserted the first strand of filament, then removed it again.
The little lever inside the sensor housing had moved freely when I installed and checked it according to the build instructions. But it turned out that I had not pushed the flat magnet (which is 6 mm wide instead of the advertised 5 mm) into the plastic lever quite far enough. So it stuck out just far enough to touch the lid of the sensor housing once that was installed, jamming the movement of the lever enough to hold it in the "filament is inserted" position.
Opening the filament sensor housing and pushing the magnet down a few 1/10 mm further solved the problem.
RE: Core One: How does the side filament sensor work?
Thank you for post as this is exactly what was wrong with my side sensor. My sensor was always on (INS) when looking at the side filament sensor (Info -> Sensor Info -> Side Filament sensor. ) The Side Filament sensor not the easiest thing to work on, but moving the magnet on the arm in more fixed it. Verified it several times as I reinstalled the sensor in the right side with the side handle. All is working including the switch to allow easier FLEX loading.
May be an obvious question to some, but I had a print that spanned multiple spools yesterday, and only the extruder sensor gave me the out of filament warning. I was able to swap the filament without issue, but it meant that I had to pull the PTFE tube quick release on the Extruder instead of pulling it out of the side insert.
Should the side filament sensor have stopped the print?
The side sensor passed the startup checks, but it is a kit build so possible that I did something wrong.
After I had built my kit, the side filament sensor got stuck in the "I see filament" position once I inserted the first strand of filament, then removed it again.
The little lever inside the sensor housing had moved freely when I installed and checked it according to the build instructions. But it turned out that I had not pushed the flat magnet (which is 6 mm wide instead of the advertised 5 mm) into the plastic lever quite far enough. So it stuck out just far enough to touch the lid of the sensor housing once that was installed, jamming the movement of the lever enough to hold it in the "filament is inserted" position.
Opening the filament sensor housing and pushing the magnet down a few 1/10 mm further solved the problem.
I added a comment to the Core One -> Core One Plus upgrade instructions for exactly this issue. Unfortunately, I only found out after reinstalling the sensor, handle and side panel, so they all had to come off again and then replace them to fix it up. A couple people already added comments to the build instructions.
Regards,
Mark
RE: Core One: How does the side filament sensor work?
Same issue with sensor always reading ins/ 2, never NINS. After opeining sensor case, saw lever magnet not pushed down flush with the lever. Now it works great. Thanks for the tip!
RE: Core One: How does the side filament sensor work?
The design of the current side filament sensor is so bad... The tolerances are too big, so the PTFE tube has too much wiggle room and the filament catches on the edge of the tube depending on the angle on which you cut the tip of the filament. Sometimes it catches on something around the steel ball as well. Inserting it just feels so junky.
And then, literally the first time I run out of filament mid-print, it did the same thing in reverse direction. The end of the filament caught onto something when being unloaded and didn't came out the sensor, leaving me with filament inaccessible from any side. Had to open the idler and use a strand of other filament to push the stuck filament in one of the directions (neither of them being easy to do).
Not to mention that, for someone like me who usually prints small things, the side sensor is effectively just a way to prevent me from using last half of a meter of my filament, which is still a considerable amount for me that I don't want to just throw away. For now I just disabled it completely. I wish there was an actual easy quick release at where PTFE tube enters the nextruder so I can just recover the last few cm of the filament when it's over.
That being said, I am thinking about completely redesigning that handle and turning the side "filament presence sensor" into "stuck spool sensor". Something as simple as a spring-loaded lever with a roller on its end that the filament goes through before going into PTFE tube - so if the spool is not turning and the tension in filament rises, the lever is pushed down and at some point it triggers the sensor. Then the printer just does the usual thing as if the filament runout was detected - pauses the print and unloads the filament - giving you a chance to fix your spool situation.
RE: Core One: How does the side filament sensor work?
Here's a very rough sketch of what I meant above 😅 Maybe someone already did something like this?
RE: Core One: How does the side filament sensor work?
There have been several remixes on Printables correcting a flaw in the redesigned filament sensor housing where the tip of the filament can get caught on a lip before it enters the main PTFE tube.
RE: Core One: How does the side filament sensor work?
Remix to fix the part in it's current state is a nice thing but I think I'll proceed with trying to repurpose the sensor anyway 😼