HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 325)

TNC 425/TNC 415 B/TNC 407 9-58
9 3D Touch Probe Systems
Measuring the tool length
9.7 Measuring Tools with the TT 110 Touch Probe
The tool length is measured with the cycle TCH PROBE 31 TOOL
LENGTH. Depending on the selected input parameters you can measure
the length of a tool by one of the following methods:
• Measurement while the tool is rotating.
This method can be used if the tool diameter is larger than the
diameter of the measuring surface of the TT 110.
• Measurement while the tool is at standstill.
This method can be used if the tool diameter is smaller than the
diameter of the measuring surface of the TT 110. Used for drills or
spherical cutters.
• Measurement of the individual teeth of the tool while it is at
standstill.
This method can be used if the tool diameter is larger than the
diameter of the measuring surface of the TT 110.
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 towards the measuring surface until it con-
tacts the surface. The offset is programmed in the tool table (see page 4-
12).
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 towards the measuring
surface of the TT 110. For this measurement the TOOL OFFSET:
RADIUS (TT-R-OFFS) in the tool table must be entered as 0.
Measuring cycle for measuring single 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 MP 6530. In the tool table you
can define an additional offset under TOOL OFFSET: LENGTH (TT-L-
OFFS). The tool is then probed radially during rotation to determine the
starting angle for measuring the single teeth.
With the aid of oriented spindle stops, the TNC then measures the length
of each tooth. To activate this function program TCH PROBE 31 = 1 for
CUTTER MEASUREMENT.
Before measuring a tool for the first time, you must enter the approximate radius, the approximate length, the
number of teeth, and the cutting direction into tool table TOOL.T (see page 4-11).