Active Chatter Control (ACC) (#145 / #2-30-1)

Application

Chatter marks can be caused during heavy-duty machining, in particular. ACC reduces chattering, thereby reducing wear on the tool and machine. In addition, ACC increases metal removal rates.

Requirements

  • Software option Active Chatter Contr. (#145 / #2-30-1)
  • Control adapted by the machine manufacturer
  • ACC column in the tool management defined with Y
  • Number of tool cutting edges defined in the CUT column

Description of function

Strong forces come into play during roughing (power milling). Depending on the tool spindle speed, the resonances in the machine tool and the chip volume (metal-removal rate during milling), the machine can sometimes begin to chatter. This chattering places heavy strain on the machine, and causes ugly marks on the workpiece surface. The tool, too, is subject to heavy and irregular wear from chattering. In extreme cases it can result in tool breakage.

In order to reduce a machine’s tendency to chatter, HEIDENHAIN offers an effective control function known as Active Chatter Control (ACC). The use of this control function is particularly advantageous during heavy machining. ACC makes substantially higher metal removal rates possible. Depending on the type of machine, the metal-removal rate can often be increased by more than 25%. You reduce the mechanical load on the machine and increase the life of your tools at the same time.

ACC was developed especially for roughing and heavy machining and is particularly effective in this area. You need to conduct appropriate tests to see whether ACC will also be advantageous on your machine and with your tool.

ACC is activated and deactivated using the ACC toggle switch in the Program Run operating mode or the MDI application.

The Program Run operating mode

The MDI Application

If ACC is active, the control shows a corresponding icon in the Positions workspace.

The Positions workspace

Notes

  • ACC reduces or prevents vibrations in the range of 20 Hz to 150 Hz. If ACC does not appear to have an effect, the vibrations may be outside of this range.
  • With the software option Machine Vibr. Contr. (#146 / #2-24-1), you can additionally improve the result.