Basically, the knife shipped with a GCC cutting plotter has a 5 mile cutting lifespan. However, it varies depending on different applications. Therefore, it is encouraged to use the Cut Test function to verify the sharpness of the blade and to choose an appropriate cutting force. The Cut Test procedure will not only provide you with a means of selecting a proper tool force, prolonging the knife's lifespan, but will also assist you in checking if you have chosen the right settings (offset for instance) to ensure output quality.