Use published benchmarks to choose a test margin, not to assign a universal printer-brand offset.
The short answer
There is no reliable printer-brand offset that can be applied to every fit. Published dimensional benchmarks provide a useful range, while fit-relevant holes and pins can behave differently from the overall model envelope. IteraMesh’s fit controls are design allowances, not automatic printer compensation: the useful starting point is the feature you measured and the way it needs to fit.
What comparable benchmarks show
The Kickstarter and Autodesk FDM protocol measures five nominal dimensions—25, 20, 15, 10 and 5 mm—in X and Y, then reports the average absolute error. Representative consumer-printer reviews using this style of test reported the following mean X/Y errors:
- Bambu Lab X1-Carbon: 0.03 mm.
- Original Prusa MK4: 0.08 mm.
- Bambu Lab P1P: 0.103 mm.
- Bambu Lab H2S: 0.133 mm.
- FLSUN T1: 0.133 mm.
- Creality K2 Pro: 0.213 mm.
These figures show a broad benchmark range of about 0.03 to 0.21 mm for this sample. They are reported test results under particular materials, profiles and conditions, not guaranteed offsets for every machine of the same model.
Why this is not one printer offset
A global dimension can look accurate while a fit feature is not. The open FDM protocol itself notes that material properties matter, and dimensional-accuracy guidance also identifies design, shrinkage, extrusion, maintenance, nozzle size, speed and first-layer quality as contributors.
- An outer wall or reference block can be close to nominal while a circular hole is undersize.
- A hole and a pin can carry different errors even when they are printed on the same machine.
- A nozzle or slicer-profile change can alter the result without changing the printer model.
- First-layer spread can affect a fit near the build plate even when the rest of the part measures well.
What the controlled comparison found
A controlled comparison makes the distinction visible. D&L measured three PQ-01 v1.2 dimensional coupons on 2026-10-21: one on a Bambu Lab X1C with a 0.4 mm nozzle, one on a Bambu Lab H2D with a 0.4 mm nozzle, and one on the H2D with a 0.2 mm nozzle. All used PLA and a 0.20 mm layer height.
The hole bank contained ten nominal diameters from 2 to 10 mm, measured independently in X and Y. MAE means mean absolute error—the average magnitude of the measured-minus-nominal differences across that bank—not a confidence interval or uncertainty statement.
| Printer and nozzle | Hole-bank MAE | Mean measured 5 mm hole | Diameter error |
|---|---|---|---|
| Bambu Lab X1C · 0.4 mm | 0.160 mm | 4.885 mm | −0.115 mm |
| Bambu Lab H2D · 0.4 mm | 0.430 mm | 4.573 mm | −0.427 mm |
| Bambu Lab H2D · 0.2 mm | 0.142 mm | 4.863 mm | −0.137 mm |
The H2D 0.4 mm coupon also had near-nominal reference geometry and rectangular apertures. The result is a measured example of geometry-specific error, not proof that every H2D print needs the same correction.
How to set a starting margin
For IteraMesh, use the formula that matches the editor rather than combining every possible source of error into one clearance value. The current editors expose the design allowance directly:
- For the Multi-row Pocket Organizer, enter the widest part of the tool and choose the pocket clearance. The opening is the tool measurement plus that selected total clearance.
- For the Compartment Drawer Organizer, enter the real inside drawer dimensions and choose the Fit Allowance. The printed width and depth are each reduced by twice the per-side allowance.
- Use the external printer measurements to decide whether a small test is worthwhile; do not add a printer-brand benchmark to either editor as a universal correction.
Try the Multi-row Pocket Organizer editor or the Compartment Drawer Organizer editor to see those calculations update before generation.
tool pocket opening = measured tool size + pocket clearance drawer organizer width or depth = measured drawer width or depth − (2 × fit allowance)
For example, the current Pocket Organizer’s Recommended setting adds 0.6 mm total to a measured tool dimension. The Drawer Organizer’s Recommended setting subtracts 1 mm on each side, so a 300 mm drawer produces a 298 mm organizer width. Do not copy the pocket value into the drawer editor or the drawer value into a pocket: they describe different geometry. Neither example claims that a particular printer will reproduce the result exactly; the external measurements explain why the finished fit still deserves a test.
Limits of the evidence
The published numbers are useful for choosing what to measure, not for promising a fit without a test. A reader should keep the printer, nozzle, material, slicer profile, feature type and first-layer condition alongside any measured margin. Repeating the same coupon and measuring it in multiple positions is more defensible than copying a brand-level number.
- Do not turn an average X/Y benchmark into a hole compensation value.
- Do not treat one coupon or one review as a confidence interval for every printer of that model.
- Do not combine measurements from different materials or profiles as if they were one controlled dataset.
Apply the result to an IteraMesh fit
Use the evidence here as a starting point, then compare it with the fit constraints for the model you are preparing.