Measuring Tolerance - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

December 2001

Coordinate of the ring gauge center for Probing Cycle 2

with respect to the machine datum (traverse range 3)

0 to +99 999.9999 [mm]

X coordinate

Y coordinate

Z coordinate

Distance of probing point below ring top surface during

+0.001 to +99 999.9999 [mm]

Measuring the center offset while calibrating the

measuring touch probe

0: Calibration with measurement of the center offset

1: Calibration without measuring the center offset

In the touch probe cycles for NC programs for automatic workpiece

measurement you can enter limit values and use them for tolerance

The following markers are set by the NC. You can evaluate them through the

M4065: All workpiece dimensions are OK

M4066: Workpiece must be remachined

M4067: Workpiece to be scrapped

When probing from the NC program you can repeat measurements as desired

in order to increase measurement precision:

In MP6170 enter the number of measurements to be performed per probing

In MP6171 enter a value by which the measurement result may differ.

The mean value is formed from the measurement results. If the individual

results of measurement differ by more than the tolerance defined in MP6171,

an error message is output. This function can be used to detect whether a

measurement has been influenced, for example, by chips.

Workpiece dimensions are OK

Workpiece must be reworked

Workpiece is scrap

Number of measurements in a programmed measurement

(touch probe block)

Confidence range for programmed measurement

(MP6170 > 1)

0.002 to 0.999 [mm]