Before initially loading filament, loosen the set screw that contacts the cam surface of the dial. Set the dial to position 1. Tighten the set screw until the drive roller makes contact with the idler roller. Do not heavily torque the set screw, just tighten it using the shank of the allen wrench.
Rotate the dial to position 4. (Confirm that the dial rotates between 1 and 4 without binding. If it binds, loosen the set screw a small amount.) At this point, you’re ready to load a filament and print. Use position 1 for very soft materials (Like Jellyfish or Ninjaflex), position 2 for moderately soft materials (like SemiFlex), position 3 for moderately hard materials (like ABS), and position 4 for very hard materials (like filled PLA). Set the correct dial location before loading filament.
Load filament. With the dial at the correct setting and the extruder at the correct temperature, run your printer’s normal filament load cycle while holding the filament between your fingers. (If your printer doesn’t have a load routine, use the print file here). Tighten the adjust screw until the filament is pulling hard through your fingers. If the motor begins stalling, loosen the adjust screw by 1/8 – 1/4 turn.
Prepare to print. Do your normal print setup routine (build platform prep, acetone clean, application of bonding agent, preheat, etc). Everyone has their own depending on their printer and the seriousness of their OCD. (See below for some useful tricks and methods).