HEIDENHAIN TNC 410 User Manual

Page 72

HEIDENHAIN TNC 410

Measuring the tool length

Before measuring a tool for the first time, enter the following data
on the tool into the tool table TOOL.T: the approximate radius, the
approximate length, the number of teeth, and the cutting direction.

The tool length is measured with the cycle TCH PROBE 31 TOOL
LENGTH. Depending on the input parameters you can measure the
length of a tool by one of the following methods:

■

If the tool diameter is larger than the diameter of the measuring
surface of the TT 120, you can measure the tool while it is
rotating (Enter TT:R-OFFS = R in the TOOL.T).

■

If the tool diameter is smaller than the diameter of the measuring
surface of the TT 120, or if you are measuring the length of a drill
or spherical cutter, you can measure the tool while it is at
standstill (Enter TT:R-OFFS = 0 in the TOOL.T).

■

If the tool diameter is larger than the diameter of the measuring
surface of the TT 120, you can measure the individual teeth of the
tool while it is at standstill.

Measuring cycle for measuring a tool during rotation
The TNC determines the longest tooth of a rotating tool by
positioning the tool to be measured at an offset to the center of the
touch probe system and then moving it toward the measuring
surface until it contacts the surface. The offset is programmed in
the tool table under Tool offset: Radius (TT: R-OFFS; preset value: R
= tool radius).

Measuring cycle for measuring a tool during standstill (e.g. for
drills)
The TNC positions the tool to be measured over the center of the
measuring surface. It then moves the tool toward the measuring
surface of the TT 120 (without rotation of the spindle) until the tool
contacts the surface. To activate this function, enter zero for the
Tool offset: Radius (TT: R-OFFS) in the tool table.

Measuring cycle for measuring individual teeth
The TNC pre-positions the tool to be measured to a position at the
side of the touch probe head. The distance from the tip of the tool
to the upper edge of the touch probe head is defined in MP6530.
You can enter an additional offset with Tool offset: Length (TT: L-
OFFS) in the tool table. The TNC probes the tool radially during
rotation to determine the starting angle for measuring the
individual teeth. It then measures the length of each tooth by
changing the corresponding angle of spindle orientation. To activate
this function, program TCH PROBE 31 = 1 for cutter measurement.

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