HEIDENHAIN TNC 640, User Manual, Page: 578 / 948

Special Functions | Dwell time FUNCTION FEED
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
12.14 Dwell time FUNCTION FEED
Programming 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
recurring dwell time in seconds, e.g. to force chip breaking in a
turning cycle. Program
FUNCTION FEED DWELL
immediately prior
to the machining you wish to run with chip breaking.
The defined dwell time from
FUNCTION FEED DWELL
is effective in
both milling and turning operations.
The
FUNCTION FEED DWELL
function is not effective with rapid
traverse movements and probing motion.
NOTICE
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 while the spindle continues to turn. Due to this behavior,
workpieces need to be scrapped if threads are cut. In addition,
there is a danger 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