Machining diamond tools with precision Electrical discharge machining is an effective method of machining PCD tools because it allows material to be removed with micron-level precision. VOLLMER's faithful QWD series is now making way for the new VOLLMER wire erosion machine, which is just the tool for the job. With a new erosion generator and advanced technology, it can produce large batches of high-quality PCD tools. Modern machine kinematics ensure high profile accuracy in both production and maintenance. With the VOLLMER operating concept.