9ce7951f_vice_by_Logan_Graphic_Products__Cause
[Problem] Hook or curve in the beginning of each cut only. [Cause] 
The initial plunge of the blade into the mat board is causing the blade tip to flex outward and immediately go back to a straight position once cutting begins. This is caused by too much blade extending out the bottom of the cutting head.
Mat Cutting Advice by Logan Graphic Products
Cause