Drawing standard and revision
Identify the governing ASME or ISO convention and ensure all teams use the same controlled revision.
PKL ENGINEERING GUIDE · GD&T
Prepare the datum system before selecting the measurement path.
A controlled drawing, agreed datum reference frame and clear quality decision are the starting points for CMM programming—not the probe count.
01 / PREPARATION
Six items to confirm before programming.
This guide supports preparation only. The approved drawing, specified GD&T standard and the customer's quality authority remain controlling.
Datum reference frame
Confirm primary, secondary and tertiary datums and how the fixture will reproduce them without distortion.
Feature control frames
Review the symbol, tolerance zone, material-condition modifier and affected feature.
Access and stylus strategy
Check probe angle, stylus length, internal access, collision envelope and qualification needs.
Point or scanning density
Choose data density based on form, profile and the evidence needed—not a generic point count.
Report and disposition
Agree what the report must show and who decides pass, fail, rework or escalation.
CONTROLLED INPUT
Bring the drawing, CAD and quality question.
PKL will help structure the probe, fixture and measurement discussion around the real requirement.