A portion of a cutting device of a crafting apparatus comprising: a support rod ; a blade housing including a blade arranged opposite a workpiece support surface ; a support member that supports the blade housing , wherein the support member is movably-connected to the support rod ; a support member moving device connected to the support member that drives movement of the support member relative the support rod in two directions including: a lifting direction (Z) for lifting the blade away from the workpiece support surface ; and a cutting direction (Z') for driving the blade toward the workpiece support surface , and at least one spring that connects the support member moving device to the support member , characterized in that the at least one spring includes: a first spring that provides a lower spring constant at lower cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'); and a second spring that provides a higher spring constant at higher cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'). a support rod ; a blade housing including a blade arranged opposite a workpiece support surface ; a support member that supports the blade housing , wherein the support member is movably-connected to the support rod ; a support member moving device connected to the support member that drives movement of the support member relative the support rod in two directions including: a lifting direction (Z) for lifting the blade away from the workpiece support surface ; and a cutting direction (Z') for driving the blade toward the workpiece support surface , and at least one spring that connects the support member moving device to the support member , characterized in that the at least one spring includes: a first spring that provides a lower spring constant at lower cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'); and a second spring that provides a higher spring constant at higher cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'). a lifting direction (Z) for lifting the blade away from the workpiece support surface ; and a cutting direction (Z') for driving the blade toward the workpiece support surface , and at least one spring that connects the support member moving device to the support member , characterized in that the at least one spring includes: a first spring that provides a lower spring constant at lower cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'); and a second spring that provides a higher spring constant at higher cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'). a first spring that provides a lower spring constant at lower cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'); and a second spring that provides a higher spring constant at higher cutting forces for the blade when the support member moving device drives movement of the support member in the cutting direction (Z'). <EOS>