True Position of a Cylinder
Position (Cylinder perpendicular to the axis system)
This is how most people think of True
Position. It is simply derived from the
“offset” of the actual to the nominal.
In our example here, we have a
tolerance band of +/- 0.025 (TP tolerance of 0.050). The cylinder is shifted 0.010 to the
right. The difference between the
nominal and actual is 0.010 mm. This is
doubled for TP output, so our TP actual would be 0.020. Well within limits.
Position (Cylinder tilted to the axis system)
Position also considers the tilt (and form) of a 3d feature such as a
This is the same cylinder. It still has the same basic 0.010 “offset” in
the center, but it is also tilted somewhat (exaggerated here for clarity). The True Position is still calculated based
on the original nominal which is still perpendicular to the axis system! The largest distance from nominal is used for the calculation. In our example here, the top end of the cylinder is at about 0.025 from nominal. Doubled, that would be 0.050 which would be at the TP tolerance limit.
Bilateral True Position of a Slot
Bilateral True Position (Slot parallel to axis system) This is how most people think of True Position. It is simply derived from the “offset” of the actual to the nominal. In our example here, we have a tolerance band of +/- 0.025 (TP tolerance of ...
Report Composite True Position
Composite Position reports the positional tolerance of a pattern of features (taken as a whole) relative to a set of datum features, as well as reporting positional tolerance between the features in the pattern. There are two components to composite ...
Free Position Alignment
A Free Position Alignment is used in a part program to create rough origin point from which your program can create a determinant reference frame using DCC commands without any further operator input. A Free Position Alignment can be created online ...
Canned Alignments are pre-packaged routines that, in one program step, prompt the operator through a sequence of feature measurements which are then used to create a complete, determinant alignment. Canned alignments are generally meant for parts ...
VB Script - Getting Started
The CMM-Manager specific VB Script user guide is found here - C:\Program Files\QxSoft\CMM-Manager xxxx\Help\User Guide - VB Script.pdf - on any PC with CMM-Manager installed. See latest version of this file attached to KB article below. Some useful ...