I caught the H2C wasting a lot of filament today. It started with a spool tangle. I have learned to handle those by telling the printer to continue, then cutting the filament when the tangle is reached. Then I reload the new end into the AMS feeder. Normally, the printer (P1S and P2S) will use the filament in the tube, then load and use the rest.
I just did this with my H2C and it stopped, displaying the message shown, and then proceeded to flush the remaining filament up to the cut before loading the rest of the spool. Why not keep printing until the filament is gone?
This is by design and to safeguard having a piece of filament stuck in the section between the print head and the AMS. The printer will purge all of the remaining filament between the AMS and the head because if it doesn’t the printer has no way to removed this section of filament if a filament swap is called, a print is canceled or finishes. The AMS can’t pull that section of filament back and the print head can’t push it back so the safeguard is to purge it all out.
It may be annoying but it avoids a much bigger problem. I assume this is also to safeguard printers that have the option to use the Filament Track Switch and why the P1s and P2S operate differently.
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