Setting Machine Parameters - HEIDENHAIN TNC 640 User Manual

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Setting machine parameters

Before you start working with the measuring cycles,
check all machine parameters defined in ProbeSettings
> CfgTT (No. 122700) and CfgTTRoundStylus (No.
114200).
Touch probe cycles 480, 481, 482, 483 and 484 can be
hidden with the machine parameter hideMeasureTT
(No. 128901).
The TNC uses the feed rate for probing defined in the
machine parameter probingFeed (No.122709) 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:
720
Touch Probe Cycles: Automatic Tool Measurement | Fundamentals
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 | User's manual for cycle programming | 10/2017