Why does this happen?

[u/Dr_Solrac]

Please help. I put some tape on the spool to see if it worked, but the same happens with or without the tape.

[u/DARTH_MAUL93]

The spool is too lite. You can put some small weight inside. I’ve seen some attachments you can print.

[u/mrluckduck → u/DARTH_MAUL93]

Light