HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 327)

TNC 425/TNC 415 B/TNC 407 9-60
9 3D Touch Probe Systems
Measuring the tool radius
The tool radius is measured with the cycle TCH PROBE 32 TOOL RADI-
US. Depending on the selected input parameters you can determine the
radius of a tool by:
• Measuring the tool during rotation
• Measuring the tool during rotation and subsequently measuring the
single cutting edges.
Measuring cycle
The TNC pre-positions the tool to be measured at a position to side of the
touch probe head. The distance from the tip of the milling 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) (if you want to measure a spherical cutter for example).
The tool is then probed radially during rotation.
If you have programmed a subsequent measurement of the single
cutting edges, the TNC measures the radius of each cutting edge with
the aid of oriented spindle stops.
Input data
• MEASURE TOOL=0 / CHECK TOOL=1
Select whether a tool is to be measured for the first time or whether a
tool that has already been measured is to be checked. If a tool is
measured for the first time the tool radius R in the central tool file
TOOL.T is overwritten by the delta value DR = 0. If you wish to check a
tool, the TNC compares the measured radius with the tool radius R that
is stored in TOOL.T. It then calculates the positive or negative deviation
from the stored value and enters it into TOOL.T as the delta value DR.
The deviation can also be used for Q parameter Q116 (see page 12-18).
If the delta value is greater than the permissible tool radius tolerance
for breakage or wear, the TNC will lock the tool (status L in TOOL.T).
• CLEARANCE HEIGHT
Position in the tool axis in which there is no danger of collision with the
workpiece or clamping devices.
• CUTTER MEASUREMENT 0=NO / 1=YES
Determine whether or not the single cutting edges should be measured.
NC program blocks for measuring a rotating tool for the first time:
TOOL CALL 12 Z
TCH PROBE
32.0 TOOL RADIUS
TCH PROBE 32.1 CHECK: 0
TCH PROBE 32.2 HEIGHT: +120
TCH PROBE 32.3
CUTTER MEASUREMENT: 0
NC program blocks for checking single cutting edges:
TOOL CALL 12 Z
TCH PROBE
32.0 TOOL RADIUS
TCH PROBE 32.1 CHECK: 1
TCH PROBE 32.2 HEIGHT: +120
TCH PROBE 32.3
CUTTER MEASUREMENT: 1
9.7 Measuring Tools with the TT 110 Touch Probe
Before measuring a tool for the first time, you must enter the following data on the tool into tool table TOOL.T (see
page 4-11): the approximate radius, the approximate length, the number of cutting edges and the cutting direction.