3D Printing: First Article Before Releasing the Batch

What needed to be solved

A multi-part 3D-printed set showed minor deviations between the nominal CAD and the physical output. Repeating the same file for the full batch would simply repeat the deviation.

Information that materially changes the answer

• Original CAD / STL
• First printed set
• Observed fit / dimensional deviation
• Printer/process behaviour
• Material and colour requirement
• Batch quantity

How the requirement is broken down

1. Inspect the first article against intended fit and function.
2. Separate design errors from process-induced dimensional shift.
3. Revise geometry only where the physical process requires compensation.
4. Lock the approved material/colour and release the remaining quantity after confirmation.

Practical execution route

The first printed set was treated as FAI. Observations from the physical part were fed back into the design so the production files better matched the real printing process before the remaining batch was started.