Patform
The base for building the PETamentor is a wooden board with dimensions of about 500 × 150 × 16 mm. Anything smaller is not recommended, because each component of the machine needs enough space without compromise. Compromises usually lead to unwanted limitations in the functionality of the components, such as improper geometry from the entry of the cut PET strip through the nozzle to the winder at the end. Make sure to allow sufficient space to fine-tune the geometry of the strip’s path, as this helps reduce resistance during melting and winding.
Puller
The puller drives the PET strip at a steady speed from the nozzle to the winder. It uses two parallel rollers, so alignment and gentle, even pinch are essential. Assemble the rollers on the shaft, mount the brackets square to the base, and set the motor in line with the axis. Thread the strip, start slowly, and tune pinch and guides until the strip moves straight without deformation or wandering. For reliable winding under load, add a flanged shaft hub between motor shaft and spool.