Why can't my Core One do something basic like detect a filament jam or a nozzle clog?
Fired off a print and went to off to do something else. About 2 hrs into the 3.5hr print, the filament tangles in the spool and then the printer spends the next 1.5hrs printing into the air. BIQU already have a $14 device that can detect this: BTT SFS V2.0 Smart Filament Sensor Why can't Prusa do the same?
Just trying to figure out why there is all of this reluctance for Prusa to introduce quality of life improvements like better filament sensing or even a nozzle wiper that every other printer on the market has as standard?
RE:
I just bought the BTT sensor. Should be straight-forward to wire this into the GPIO board. OctoPrint has a smart sensor plugin which can send a pause g-code if it's triggered. I have the next 2 weeks off so this will be my project...
RE: Why can't my Core One do something basic like detect a filament jam or a nozzle clog?
I hear you…. Yesterday I started a long print with a 0.8mm nozzle on my old 3.5, and somehow the hotend clogged but the printer kept going happily.
Curious how your BTT sensor experiment goes.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: Why can't my Core One do something basic like detect a filament jam or a nozzle clog?
Fired off a print and went to off to do something else. About 2 hrs into the 3.5hr print, the filament tangles in the spool and then the printer spends the next 1.5hrs printing into the air. BIQU already have a $14 device that can detect this: BTT SFS V2.0 Smart Filament Sensor Why can't Prusa do the same?
Just trying to figure out why there is all of this reluctance for Prusa to introduce quality of life improvements like better filament sensing or even a nozzle wiper that every other printer on the market has as standard?
I think it has a lot to do with the fact that they are using the "load cell" to detect this, and this implementation of "load cell" is done exceptionally poorly. The voltage change of strain gauges is extremely small, and are generally arranged in a bridge, with two of the gauges measuring actual strain in the direction used, and two other gauges on a separate axis to cancel thermal changes. Even with this you need low noise instrumentation op amps to read them well.
What makes it even harder to read these signals is if you take those bridge wires and run them in parallel with a pwm'd higher energy wires. Like say from a heater. The design here is seriously something a 101EE student should catch. There are a ton of viable solutions. Put the op amp with the gauges themselves (I've done this in a commercial product, not just blowing smoke). Or at least shield the damn wires.
On mine at least that signal jumps all around when heat is on, physical load on it or not. Support claimed it was normal and didn't matter. They still sent me a new gauge, but I've just been killing heating during probing and it's fine. I also did mention to support that I too had filament jams that were not detected, which was also completely shrugged off by support.