10.16 Dwell Time Function Feed; Programming A Dwell Time - HEIDENHAIN TNC 620 User Manual

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10.16 Dwell time FUNCTION FEED

Programming a dwell time

Application
Refer to your machine manual.
Read and note the functional description of the machine
tool builder.
Follow the safety precautions.
The FUNCTION FEED DWELL function can be used to program a
cyclic dwell time in seconds, e.g. to force chip breaking.
Program FUNCTION FEED DWELL immediately prior to the
operation you wish to run with chip breaking.
The FUNCTION FEED DWELL function is not effective with rapid
traverse movements and probing motion.
Caution: Danger to the tool and workpiece!
When the FUNCTION FEED DWELL function is active, the control
will repeatedly interrupt the feed movement. While the feed
movement is interrupted, the tool remains at its current position,
and the spindle continues to turn. During thread cutting, this
behavior will cause the workpiece to become scrap. There is also
a risk of tool breakage during execution!
Deactivate the FUNCTION FEED DWELL function before
cutting threads
Procedure
Example
13 FUNCTION FEED DWELL D-TIME0.5 F-TIME5
Proceed as follows for the definition:
Show the soft-key row with special functions
Press the PROGRAM FUNCTIONS soft key
Press the FUNCTION FEED soft key
Press the FEED DWELL soft key
Define the interval duration for dwelling D-TIME
Define the interval duration for cutting F-TIME
422
NOTICE
Special functions | Dwell time FUNCTION FEED
HEIDENHAIN | TNC 620 | Klartext Programming User's Manual | 01/2022