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17
Touch Probe Cycles: Automatic Tool Measurement
17.1
Fundamentals
Setting machine parameters
Before you start working with the measuring
cycles, check all machine parameters defined
in ProbeSettings > CfgToolMeasurement and
CfgTTRoundStylus.
The TNC uses the feed rate for probing defined in the
machine parameter 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:
maxPeriphSpeedMeas:
r:
The feed rate for probing is calculated from:
v = measuring tolerance • n with
v:
Measuring tolerance
n:
446
Spindle speed [rpm]
Maximum permissible cutting speed in
m/min
Active tool radius in mm
Feed rate for probing in mm/min
Measuring tolerance [mm], depending
on maxPeriphSpeedMeas
Shaft speed [rpm]
HEIDENHAIN | TNC 320 | User's manual for cycle programming | 9/2016
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