HEIDENHAIN TNC 640 (34059x-02) ISO programming - Manual (Page 355)

Active Chatter Control (ACC; software option) 11.4
11
TNC 640 | User's Manual for DIN/ISO Programming | 5/2013
355
11.4 Active Chatter Control (ACC; software
option)
Application
This feature must be enabled and adapted by the
machine tool builder.
Refer to your machine manual.
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 tool 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.
To reduce the inclination to chattering, HEIDENHAIN now offers an
effective antidote with ACC (Active Chatter Control). The use of this
control function is particularly advantageous during heavy cutting.
ACC makes substantially higher metal removal rates possible. This
makes it possible to increase your metal removal rate by up to 25
% and more, depending on the type of machine. You reduce the
mechanical load on the machine and increase the life of your tools
at the same time.
Please note that ACC was developed especially for
heavy cutting and is particularly effective in this area.
You need to conduct appropriate tests to ensure
whether ACC is also advantageous during standard
roughing.
When you use the ACC feature, you must enter the
number of tool cuts
CUT for the corresponding tool in
the TOOL.T tool table.
Activating/deactivating ACC
In order to activate ACC you need to set the column ACC for the
respective tool in the tool table TOOL.T to 1. Other settings are not
required.
In order to deactivate ACC, you need to set the column
ACC to 0.