PCS Example #9

Offset Alignment

Introduction

In this exercise we will perform an offset alignment to create a secondary datum. The offset align function performs a realignment of an existing part coordinate sys-tem. As you must have a complete coordinate system defined, please setup your part described in PCS Example 5.

Notice to Junior Users!
If you do not have the Advanced PCS and Stylus Option, you have access to only one PCS at any point of your inspection. By performing the Pivot align command, you will realign the existing PCS 1 and will not be able to revert back to the original part coordinate system. If you have the Advanced PCS and Stylus option, the pivot command will create PCS 2.

Exercise_9a.jpg (9895 bytes)

Exercise_9b.jpg (9496 bytes)
figure 1, Datum target layout figure 2, Completed PCS

Practice Steps

Step 1

From the established PCS as defined in PCS Example #5, recall feature number 6 ID XY Circle. We perform this step in preparation of the realignment. The offset align required two features which both must be in the same PCS and stacked together in the report, see Recalling Features.

Step 2

Select Circle <z>, if auto-direction is not activated, you will be prompted for the Circle type: ID, OD, IR, or OR, choose ID. Capture the four data points identified as A-ID/4, see figure1.

Step 3

Select Offset Align, press <shift + K >. Note: Junior Users if you do not have the Advanced PCS and Stylus option, you will be prompted whether to realign PCS 1 or cancel, select < Ok >. A request will be displayed where you enter your offset value. Enter .70711 and press < Accept >.

figure 3, Enter Offset Value

This will realign the current PCS to the plus (+) side of the last feature. A negative (-) will realign to the left side of the feature. The value you enter controls the realignment direction based on the sign of the value, see figure 2 for completed PCS.

Related Procedures:

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Offset Align, Circle