HEIDENHAIN TNC 128 (77184x-02) - Manual (Page 477)

Fundamentals 20.4
20
TNC 128 | User's Manual HEIDENHAIN Conversational Programming | 5/2014
477
You can program the cycles for tool measurement in the
Programming mode of operation using the Cycl Def key. The
following cycles are available:
Cycle New
format Page
Calibrating the TT, Cycle 480 481
Measuring the tool length, Cycle 481 483
Measuring the tool radius, Cycle 482 485
Measuring the tool length and radius, Cycle 483 487
The measuring cycles can be used only when the
central tool file TOOL.T is active.
Before working with the measuring cycles, you must
first enter all the required data into the central tool
file and call the tool to be measured with
TOOL
CALL.
Setting machine parameters
Before you start working with the measuring
cycles, check all machine parameters defined in
ProbeSettings > CfgTT and CfgTTRoundStylus.
The TNC uses the feed rate for probing defined in
probingFeed when measuring a tool at standstill.
When measuring a rotating tool, the TNC automatically calculates
the spindle speed and feed rate for probing.
The spindle speed is calculated as follows:
n = maxPeriphSpeedMeas / ( r • 0.0063) where
n: Spindle speed [rpm]
maxPeriphSpeedMeas: Maximum permissible cutting speed in
m/min
r: Active tool radius in mm
The feed rate for probing is calculated from:
v = measuring tolerance • n with
v: Feed rate for probing in mm/min
Measuring tolerance Measuring tolerance [mm], depending
on
maxPeriphSpeedMeas
n: Shaft speed [rpm]