The Oval Rotation field controls how much the foot block will rotate before cutting. Adjust the Oval Rotation if you are getting Bumps or Feathers on an oval outside.

If you have too much rotation on an oval outside, you will get a Feather, too little and you will get a Bump.

Select the desired Cartridge Type Tab and then the bevel type you want to edit from the Current Bevel Type dropdown control before making adjustments.

Select Current Bevel Type-Front of Mat if it is being cut from the front of the mat.

In Oval Rotation, eight points equals one degree of rotation. 

Users usually make adjustments 4 points at a time.

Increase the Oval Rotation to turn the foot block clockwise to correct for a Bump.

Decrease the Oval Rotation to turn the foot block counterclockwise to correct for a Feather.

The blade returns to the outside of the starting point of an oval outside cut, creating a bump in the oval.

Increase the Oval Rotation.

The object will now cut correctly.

When making adjustments, click either the minus or plus button (-/+) at the end of the desired field about five or six times in the direction indicated. Click OK and do a test cut. Check the results of the cut and continue making adjustments until the desired outcome is achieved.

The blade returns to the inside of the starting point of an oval outside cut, creating a feather in the oval.

Decrease the Oval Rotation.

The object will now cut correctly.

When making adjustments, click either the minus or plus button (-/+) at the end of the desired field about five or six times in the direction indicated. Click OK and do a test cut. Check the results of the cut and continue making adjustments until the desired outcome is achieved.

Optionally, use the Circle/Oval Rotation Utility to fine-tune specific sizes of circles/ovals.