PG’s are used to measure pressed panels. The PG should replicate the jig that the
panel will be assembled in. Datum faces, clamps and location pins present on the jig
should all be duplicated in the PG in order to ensure correlation of data throughout the
process and hence enable a condition to be traced effectively from one stage to the
next.
PG’s can be used to do a quick visual check of the part condition, or they can be used
in conjunction with the 3D-layout machine to carry out a more detailed inspection.
A picture of a PG is shown below.