One of Carvey’s most important assemblies is the Smart Clamp which allows the machine to automatically locate a zero point for the Z axis no matter the material or bit used. There is a button located on top of the Smart Clamp that registers a press from the milling tool when you begin a carving job. This part needs to be replaced from time to time from use, wear and tear. Instructions for replacing and/or cleaning your smart clamp can be found here .