The Rotation field controls how much the foot block will rotate before cutting. Adjust the Rotation if you are getting Swoops or Flares in the corners on a non-oval drop.

If you have too much Rotation on a non-oval drop you will get a Flare, too little rotation and you will get a Swoop. 

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 Rotation, eight points equals one degree of rotation. 

Users usually make adjustments 4 points at a time.

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

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

The beginning of the cut swoops toward the non-oval drop.

Increase the Rotation.

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 beginning of the cut flares away from the non-oval drop.

Decrease the Rotation.

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.

A Twisted Corner is when the blade turns before retracting from the matboard, which tears the matboard and twists the corner which is especially visible on the back of the mat.

Check to make sure the Rotation hasn't been set to a high number. 

Optionally, see the Clean the Foot Block procedure for information on cleaning the foot block. 

Twisted corners can also be a symptom of oil/water in the Air Valve, or an issue with the Head. Check the Air Regulator for excess water.