Haas Control Overcomes Varying Machining Accuracy

Haas software engineers have designed into the Haas Control a facility called Maximum Rounding, which allows the user to define the machining accuracy of rounded corners within a selected tolerance. The default value is 0.05in (1.27mm) but it can be set to zero, in which case the machine will treat all corners as if an exact stop is required. Setting 85 is only a default value and the user can override this figure using a programmed command with the G187 code and specifying an E value.

For example, G187 E0.5 would set the maximum corner-rounding value to 0.5mm for the duration of the program and will be cancelled when either 'reset' is pressed, M30 or M02 is executed, the end of program is reached, or E-stop is pressed. Most CAM-system post processors can be adjusted to automatically output a G187 for a roughing cycle and then alter the value again when the finishing cycle is run. The result is a shorter cycle time, more accurate and consistent parts and extended cutting-tool life.

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