Technology Scripts

A technology script is a Python file named after the technology (e.g., ArcWelding.py). It lives in the technology scripts folder inside the plugin.

When the kernel processes a technology, it calls these callbacks in order:

Callback Chain

Callback → Operator Class Reference

Callback	Operator class	Purpose
PostTechInitAttributes	`CENPyOlpTech_AttribInitOperator`	Create/read/write technology attributes
PostTechInitEvents	`CENPyOlpTech_EventInitOperator`	Register technology events
PostTechInitRules	`CENPyOlpTech_RuleInitOperator`	Register technology rules
PostInitManufacturingGeometry	`CENPyOlpTech_MfGeoInitOperator`	Initialize manufacturing geometry
PostProcessOperationGroupAttributes	`CENPyOlpTech_POGAttribOperator`	Read/write operation group attributes
PostTechUpdate	`CENPyOlpTech_UpdateOperator`	Called during technology update
PrevExecuteRecipe	`CENPyOlpTech_RecipeOperator`	Runs before recipe execution
PostTechOnAttribChanged	`CENPyOlpTech_AttribChangedOperator`	Reacts to attribute changes
PostTechOnFrameChanged	`CENPyOlpFrameChangedOperator`	Reacts to frame changes

Typical Pattern


def PostTechInitAttributes(techAttribInitOperator):
    # Create custom attributes
    creator = techAttribInitOperator.GetAttribCreator()
    creator.AddDouble('WeldSpeed', 10.0, 0, 100, 0.5,
                      USER_ATTRIBUTE | PROCESS_ATTRIBUTE, ATTRIB_SPEED, 'Weld Speed')
 
def PostTechOnAttribChanged(techAttribChangedOperator):
    # React to user changing an attribute
    name = techAttribChangedOperator.GetChangedAttribName()
    if name == 'WeldSpeed':
        getter = techAttribChangedOperator.GetAttribGetter()
        speed = getter.GetDouble('WeldSpeed')
        logOp = techAttribChangedOperator.GetLoggerOperator()
        logOp.LogInfo(f'Weld speed changed to {speed}')

Was this page helpful?