PTC Creo ModelCHECK Teacher: Start Part and Start Assembly Items

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Start part and start assembly items are a group of features that your company has set as a standard starting point for every part and assembly. These features are normally added to the model when it is created, and can be automated with the help of a map key or a menu pick in Creo Parametric.

Start features can be any of the following:

• Datum Planes

• Datum Coordinate Systems

• Datum Axes

• Datum Points

• Datum Curves

• Parameters

• Layers

• Views

In many cases, you will have different requirements for your start features depending on the type of model you are creating, or whether it is a part or assembly.

Using Start Features has many advantages including:

• It makes it easier for other users to understand your model.

• It makes it easier for you to assemble parts together because assembly references can be identified in a standard manner.

• Maintaining company wide consistency.

• Ensures that default datum planes are always used.

Creo ModelCHECK supports the following start features:

Feature	Name for Part Mode	Name for Assembly Mode
Datum Plane	PRT_DATUM_PLANE	ASM_DATUM_PLANE
Datum CSYS	PRT_DATUM_CSYS	ASM_DATUM_CSYS
Datum Axis	PRT_DATUM_AXIS	ASM_DATUM_AXIS
Datum Point	PRT_DATUM_POINT	ASM_DATUM_POINT
Datum Curve	PRT_DATUM_CURVE	ASN_DATUM_CURVE
Parameter	PRT_PARAMETER	ASM_PARAMETER
Layer	PRT_LAYER	ASM_LAYER
View	PRT_VIEW	ASM_VIEW

Your company has the following standard start features:

• Three default datum planes called DTM1, DTM2, DTM3

• A PDM designated parameter called PN which is the model's part number

• Three views called TOP, SIDE and ISO