Fit Coupon Study
One Slot, Five Widths
Read the test question, compare the observed fit, and plan the next coupon.
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Fit Coupons
Small pieces that turn an intended joint into a testable question.
Target fit → test geometry → observed fit → next test
Fit Coupon Study
Tight Fit vs Easy Assembly
Read the test question, compare the observed fit, and plan the next coupon.
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Fit Coupon Study
A Small Coupon Before a Large Sheet
Read the test question, compare the observed fit, and plan the next coupon.
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Fit Coupon Method
What did this test piece actually teach us about the fit?
Target fit → test geometry → observed fit → next test
01
Target fit
Define how the joint should assemble and whether it must come apart again.
02
Test geometry
Use a small labeled slot-and-tab coupon. Keep the mating part and test conditions consistent.
03
Observed fit
Record force, play, edge damage, and the fit after removal. A drawn dimension is not the result.
04
Next test
Change one variable, repeat the coupon, and compare it with the first observation.
The notebook connects intended dimensions with the real joint after laser cutting. It is an educational testing resource; numerical examples describe a coupon, not ready-made settings for a material.
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