HEIDENHAIN TNC 620 (34056x-04) Cycle programming - Manual (Page 448)

Touch Probe Cycles: Automatic Tool Measurement
19.1 Fundamentals
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TNC 620 | User's Manual Cycle Programming | 5/2013
Setting machine parameters
Before you start work with the TT cycles, inspect
all machine parameters defined in
ProbeSettings >
CfgToolMeasurement 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]