NPTH Registration (Drill)

Reports the smallest center-to-center distance between drills and touching pads, if larger than reg_allowance and smaller than max_reg.

Internal ERF Name	<Area>:npth_reg
Measurement Shape Measurement Value Measurement ID	Segment Distance Hole; Feature
Layers Displayed	Signal layer Drill layer which pierces it
Graphic
Purpose	Typically, a hole should be in the middle of a pad. Any deviation may indicate inaccuracy in the input files or a CAD system error.
Function	Reports the smallest center-to-center distance between drills and touching pads, if larger than reg_allowance and smaller than max_reg. Measurements are segments representing distance.
ERF Parameters	pp_layer
ERF Variables	reg_allowance max_reg
Constraint	Hole Registration
Limitations	If the distance between the centers is larger than max_reg, then the features are considered offset on purpose and large registration errors may be missed. Vias drilled in SMD lands may be intentionally offset.