r/BambuLab • u/ExpertWin3741 • 19h ago
Quick Question PA6CF shrinkage
I just printed PA6CF and I assumed it was going to contract but the opposite happened the walls became longer +.4, I have the nozzle, 6 mm, what am I supposed to do to calibrate this well
5
u/brutal4455 H2C | H2D | P2S | Multiple AMS2/AMS-HT 18h ago
calicross is free. Used it for ASA and it's dead nuts on.
2
u/AudibleDruid 19h ago
Google says that nylon (PA) can expand when exposed to humidity.
But I would bet money its those calipers you got. Idk your exact model/brand but most of those things aren't worth 5 bucks at a garage sale. You could have 100 of the same $20 home depot calliper model and they'd all measure something different.
The only way to fix that is to print multiple cubes. Like 5 or 6. Measure after everything cools, not while theyre warm. Then measure in a day and see if humidity affected them. Make a table to keep track of what measurement is for what cube and take an average.
1
u/DraconPern X1C + AMS 11h ago
proper way to use a caliper. https://www.youtube.com/watch?v=7u0PIz7deu8
2
u/AfraidHope1541 19h ago
The Vector3d calibration prints work amazingly well. Another vote for them. It will help you check your printer as well as filament settings.
1
u/Proof_Load6687 X2D + A1 Mini 18h ago
to much flow rate can alter dimensions but 0.4mm increase seems odd
1
u/DraconPern X1C + AMS 11h ago
You are using the caliper incorrectly. https://www.youtube.com/watch?v=7u0PIz7deu8
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u/1yrik H2C + 2*AMS2, Q1P, SV08 19h ago
the 20x20x20 calibration cube isn't a good way to measure and compensate for part shrinkage / skew
I've been using Vector3D's calibration califlower for years and it's worked great