Filament Not Coming Out

Bambu Lab A Series Troubleshooting
1

Hi.

I connected the A1, cut the included filament, and inserted it.

It goes through all the tests, but it doesn’t feed anything.

Not even when I load the filament…

Unloading works, and then even a little bit of filament comes out.

But loading afterwards doesn’t work… never.

I then switched to a spool and it works…

When it performs a dynamic flow calibration… shouldn’t it notice that nothing is coming out?

Why does it only not work with the test filament? It works with the spool…

Until now, I’ve only ever dealt with direct extruders and the A1 mini with AMS lite… there were never any problems.

That’s why I’m a bit puzzled and asking here.

Edit : Of course, the test filament was free and did not snag, and could have been pushed through easily.

3

The strange angle when using the test filament would be a very good explanation. I had never had anything to do with tubes before, except for the AMS Lite, and everything was always fine there.
Of course, the angle was extreme with the test filament, but I didn’t even think that it might not be able to pull it… Another angle wouldn’t work with the test filament anyway.
Only one question remains… is the dynamic flow control really there or not? If it were a function that worked 100%, it should have detected that no filament was being fed.
Or is it just a marketing gimmick?