3d Print Without the Filament Jamming and Tying Itself Into a Knot

The Prusa MK4 twists up the cheaper filament ruining the print. After some investigating, I've figured out how to keep that from happening.

1 1/2" PVC tubing about 6", and two more pieces at about 3/8"

bamboo skewers

5 gallon paint stick

string about 4 feet.

I'm not sure if other printers have this issue, but my Prusa MK4 has this issue. The roll of filament it came with worked perfectly. It's a $33 roll of material. I bought a roll of PLA from a no-name brand that got good reviews for $10 roll. The print quality was good, but there is an issue: the filament coming off the roll would twist into a knot and destroy the print by shifting the print, and then breaking the filament, aka all hell broke loose. After watching very carefully for far too long I figure out the issue:

The filament was corkscrewing as it gets pulled through the extruder. I'm assuming Prusa reverse corkscrews the filament before putting it on the spool, but the cheaper filament did not do that.

I came up with a support for the filament that auto reverse spins so the corkscrew does not twist the filament.

so basically, what I did was I don't use the fixed spindle holder for the filament but made one from a 6" piece of pvc pipe. I ran string through the pvc pipe and then up on the sides of the spool and made sure the string didn't rub against the spool by putting a spacer made from a paintstick with two wedges in it to make sure the string didn't fall off the sides.

I then made a separate loop at the mid-point and ran it up as a single string to a support from the ceiling (ok I just used the chandelier.) The spool kept slipping side to side and getting unbalanced so I cut two rings from the 1.5" pvc pipe to act as press fit rings to keep the spool from sliding from one side to the other.