An example highlighting the proficiency of this system is a workpiece that does not meet tolerance requirements after a first grinding pass. Following on-machine measurement, the GTG2 calculates the necessary adjustments to grinding wheel form or axis position and then passes the data to a 2-axis CNC wheel dressing system to achieve on machine dressing of the grinding wheel. All of these operations are achieved automatically and rarely does the machine need to make further corrections after the first pass.

Holroyd’s integration of the in-cycle wheel dressing system into the GTG2 is not a one off, rather it is part of an overall design strategy that takes a number of functions crucial to precise and effective gear grinding and integrates them into the machine as Automatic Programmable Cycles. The GTG2 offers users eight of these cycles to simplify and improve gear production. In addition to automatic wheel dressing they include:

• Gear Tooth Grinding, with Optional Probing & Form Measurement

• Repeat Cycles with Nesting up to 99 Times.

• Fillet Radius or Trochoid Root Form.

• Gear Crowning Cycle for Modified Tooth Forms.

• Lead Crowning by Bob Crowning, or by Adjusting the Lead or Combination of Both.

• Programmable Constant Peripheral Grinding Wheel Speed, Based on Actual Wheel Diameter.