PETG is the most profitable filament in the workshop, but also the most treacherous. See 7 tested tips for temperature (235-250°C), retraction, bed adhesion and print profile that separate a premium part from scrap. Gcode included.
PETG combines engineering-grade strength with accessible printing, but it only delivers that result when the 5 factors below are dialed in. If any one of them slips, stringing and warping become the rule.
Every brand has a different sweet spot. Run a temperature tower from 220-250°C and log the best level before producing at scale.
PETG hates aggressive retraction (high viscosity, material separates). Try 2-4mm at 25-30mm/s on Bowden, 0.8-1.2mm on Direct Drive.
gcodeM207 S1.0 F1500 ; retract 1mm @ 25mm/s (direct drive)
M208 S0.1 F900 ; extra prime 0.1mm @ 15mm/sPEI works for small parts. For long parts (>15cm), apply a thin layer of glue stick with alcohol first: adhesion triples.
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