PCB Layout CAD : DRC/MRC Settings

Rule Check (MRC)

It is possible to select whether to execute a check when executing Run MRC.
This is linked to the dialog that appears when executing Run MRC, and the set values are inherited.

For more details about opening the DRC/MRC Settings screen, refer to About DRC/MRC Settings.

Item
Item Name Content

It is possible to select whether to execute an MRC check. By placing a check here, an MRC is executed only for items that are checked.

Error Type

It is possible to select either "Error" or "Warning" as the Error Type when executing Run MRC.

Check Contents

Check Contents are described.

 


About Types and Check Contents
Type Check Contents Mark Description

Clearance

Clearance rule.

●Error Check Type: Clearance Violation

An error is detected when the value set in "Clearance" is not maintained.

Measured Value: Clearance Violation
Setting Value: Clearance MRC

Reference

Number / Layers of placed References.

●Error Check Type: Reference Count Violation

An error is detected when the number of references for each part / footprint that are placed on the layers specified at the Target Layer fields is 0, or 2 or more.

Measured Value: Number of Placed References

The Target Layer settings can be accessed from the Reference settings that is opened by selecting Settings >> DRC/MRC Settings.

●Error Check Type: Reference Layer Violation

An error is detected when a reference for a component/footprint is placed on a different layer from the layer on which that component/footprint is placed on.

●Error Check Type: Reference Visibility Violation

An error is detected when a reference for a component/footprint is not displayed.

Text Angle

Angles / Inversion of References, attributes and texts.

●Error Check Type: Text Angle Violation

An error is detected when references/attribute texts/texts on the layers specified at the Target Layer fields are placed at any unpermitted angles.

Measured Value: Current Angle
Setting Value: Allowed Angle

●Error Check Type: Flipped Text Violation

An error is detected when references/attribute texts/texts on the layers specified at the Target Layer fields are flipped without its permission setting.

The settings for Target Layer and text angles/flipping permission can be accessed from the Text Angle settings that is opened by selecting Settings >> DRC/MRC Settings.

Solder Resist/Paste

The existence of solder resist and paste.

 

●Error Check Type: No Existence of Solder Resist, No Existence of Paste

An error is detected when there is no Solder Resist on the Pad/Via, and when there is no paste on the SMD Pad.
Check the Pad/Via, and set the Solder Resist and Paste, or add it to excluded components.

 

Options
Item Name Content

Check Clearance of Displayed Objects only

Only the currently displayed area is the target for MRC check.

Maximum Number of Errors

The maximum number of detected errors can be set for when executing Run MRC.
When there are many error items and Run MRC takes a long time, etc., setting a limit makes it easier to confirm.
* Keep in mind that errors over the maximum will not be shown when Run MRC is executed.