HEIDENHAIN TNC 320 User manual

TNC 320
User’s Manual
ISO programming
NC Software
771851-05
771855-05
English (en)
10/2017

Controls and displays
2HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Controls and displays
Keys
Keys on visual display unit
Key Function
Selecting the screen layout
Toggle the display between
machine operating mode, program-
ming mode, and a third desktop
Soft keys for selecting functions on
screen
Shifting between soft-key rows
Machine operating modes
Key Function
Manual operation
Electronic handwheel
Positioning with manual data input
Program run, single block
Program run, full sequence
Programming modes
Key Function
Programming
Test run
Entering and editing coordinate
axes and numbers
Key Function
. . . Select coordinate axes or enter them in a program
. . . Numbers
Decimal separator / Reverse
algebraic sign
Polar coordinate entry /
Incremental values
Q parameter programming /
Q parameter status
Capture actual position
NO
ENT
Skip dialog questions, delete words
Confirm entry and resume dialog
Conclude block and exit entry
Clear entries or error message
Abort dialog, delete program
section
Tool functions
Key Function
Define tool data in the program
Call tool data

HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017 3
Managing programs and files,
control functions
Key Function
Select or delete programs and files,
external data transfer
Define program call, select datum
and point tables
Select MOD functions
Display help text for NC error
messages, call TNCguide
Display all current error messages
Show calculator
Show special functions
Navigation keys
Key Function
Position the cursor
Go directly to blocks, cycles and
parameter functions
Navigate to the program start or
table start
Navigate to the program end or end
of a table line
Navigate up one page
Navigate down one page
Select the next tab in forms
Up/down one dialog box or button
Cycles, subprograms and
program section repeats
Key Function
Define touch probe cycles
Define and call cycles
Enter and call labels for subpro-
gramming and program section
repeats
Enter program stop in a program
Programming path movements
Key Function
Approach/depart contour
FK free contour programming
Straight line
Circle center/pole for polar coordi-
nates
Circular arc with center
Circle with radius
Circular arc with tangential connec-
tion
Chamfer/rounding arc
Potentiometer for feed rate
and spindle speed
Feed rate Spindle speed

Fundamentals

Fundamentals | About this manual
6HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
About this manual
Safety precautions
Comply with all safety precautions indicated in this document and
in your machine tool builder's documentation!
Precautionary statements warn of hazards in handling software
and devices and provide information on their prevention. They are
classified by hazard severity and divided into the following groups:
DANGER
Danger indicates hazards for persons. If you do not follow the
avoidance instructions, the hazard will result in death or severe
injury.
WARNING
Warning indicates hazards for persons. If you do not follow the
avoidance instructions, the hazard could result in death or
serious injury.
CAUTION
Caution indicates hazards for persons. If you do not follow the
avoidance instructions, the hazard could result in minor or
moderate injury.
NOTICE
Notice indicates danger to material or data. If you do not follow
the avoidance instructions, the hazard could result in things
other than personal injury, like property damage.
Sequence of information in precautionary statements
All precautionary statements comprise the following four sections:
Signal word indicating the hazard severity
Type and source of hazard
Consequences of ignoring the hazard, e.g.: "There is danger of
collision during subsequent machining operations"
Escape – Hazard prevention measures

Fundamentals | About this manual
HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017 7
Informational notes
Observe the informational notes provided in these instructions to
ensure reliable and efficient operation of the software.
In these instructions, you will find the following informational
notes:
The information symbol indicates a tip.
A tip provides important additional or supplementary
information.
This symbol prompts you to follow the safety
precautions of your machine tool builder. This symbol
also indicates machine-dependent functions. Possible
hazards for the operator and the machine are described
in the machine manual.
The book symbol represents a cross reference to
external documentation, e.g. the documentation of your
machine tool builder or other supplier.
Would you like any changes, or have you found any errors?
We are continuously striving to improve our documentation for you.
Please help us by sending your requests to the following e-mail
address:
[email protected]

Fundamentals | Control model, software and features
8HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Control model, software and features
This manual describes functions and features provided by controls
as of the following NC software numbers.
Control model NC software number
TNC 320 771851-05
TNC 320 Programming Station 771855-05
The machine manufacturer adapts the usable features of the
control to his machine by the setting machine parameters. Some of
the functions described in this manual may therefore not be among
the features provided by the control on your machine tool.
Control functions that may not be available on your machine
include:
Tool measurement with the TT
In order to find out about the actual features of your machine,
please contact the machine manufacturer.
Many machine manufacturers, as well as HEIDENHAIN, offer
programming courses for the HEIDENHAIN controls. Participation
in one of these courses is recommended to familiarize yourself
thoroughly with the control's functions.
Cycle Programming User's Manual:
All of the cycle functions (touch probe cycles and fixed
cycles) are described in the Cycle Programming User's
Manual. If you need this user's manual, please contact
HEIDENHAIN if required. ID: 1096959-xx

Fundamentals | Control model, software and features
HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017 9
Software options
The TNC 320 features various software options that can be enabled by your machine tool builder. Each option is to
be enabled separately and contains the following respective functions:
Additional Axis (option 0 and option 1)
Additional axis Additional control loops 1 and 2
Advanced Function Set 1 (option 8)
Expanded functions Group 1 Machining with rotary tables
Cylindrical contours as if in two axes
Feed rate in distance per minute
Coordinate conversions:
Tilting the working plane
HEIDENHAIN DNC (option 18)
Communication with external PC applications over COM component
CAD Import (option 42)
CAD import Support for DXF, STEP and IGES
Adoption of contours and point patterns
Simple and convenient specification of presets
Selecting graphical features of contour sections from conversational
programs
Extended Tool Management (option 93)
Extended tool management Python-based
Remote Desktop Manager (option 133)
Remote operation of external
computer units
Windows on a separate computer unit
Incorporated in the control's interface

Fundamentals | Control model, software and features
10 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Feature Content Level (upgrade functions)
Along with software options, significant further improvements of
the control software are managed via the Feature Content Level
upgrade functions. If you install a software update on your control
you do not automatically have the functions available as covered by
the FCL.
All upgrade functions are available to you without
surcharge when you receive a new machine.
Upgrade functions are identified in the manual as FCL n. The n
signifies the serial number of the development status.
You can purchase a code number in order to permanently enable
the FCL functions. For more information, contact your machine tool
builder or HEIDENHAIN.
Intended place of operation
The control complies with the limits for a Class A device in
accordance with the specifications in EN 55022, and is intended for
use primarily in industrially-zoned areas.
Legal information
This product uses open source software. Further information is
available on the control under:
Programming operating mode
MOD function
LICENSE INFO soft key

Fundamentals | Control model, software and features
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New functions
New functions 34055x-06
The active tool-axis direction can now be activated as a virtual
tool axis in the Manual Operation mode and during handwheel
superimpositioning, see "Superimposing handwheel positioning
during program run: M118 ", page 439
Writing and reading data in freely definable tables, see "Freely
definable tables", page 463
New touch probe Cycle 484 for calibrating the wireless touch
probe TT 449, see Cycle Programming User's Manual
The new HR 520 and HR 550 FS handwheels are supported,
see "Traverse with electronic handwheels", page 519
New operating Cycle 225 Engraving,
see Cycle Programming User's Manual
New manual probing cycle Center line as preset, see "Setting a
center line as preset", page 569
New function for rounding corners, see "Rounding corners:
M197", page 446
External access to the control can now be blocked with an MOD
function, see "External access", page 628

Fundamentals | Control model, software and features
12 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Changed functions 34055x-06
The maximum number of characters for the NAME and DOC
fields in the tool table has been increased from 16 to 32, see
"Entering tool data into the table", page 208
Operation and positioning behavior of the manual probing cycles
has been improved, see "Using a 3-D touch probe ", page 540
Predefined values can now be entered into a cycle
parameter with the PREDEF function in cycles,
see Cycle Programming User's Manual
With the KinematicsOpt cycles a new optimization algorithm is
now used, see the Cycle Programming User's Manual
With Cycle 257, CIRCULAR STUD, a parameter is now available
with which you can determine the approach position on the
stud, see User's Manual for Cycle Programming
With Cycle 256 RECTANGULAR STUD, a parameter is now
available with which you can determine the approach position on
the stud, see Cycle Programming User's Manual
With the manual Basic Rotation touch probe cycle, workpiece
misalignment can now be compensated for via a table rotation,
see "Compensation of workpiece misalignment by rotating the
table", page 557

Fundamentals | Control model, software and features
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New functions 77185x-01
New special operating mode RETRACT, see "Retraction after a
power interruption", page 610
New graphic simulation, see "Graphics ", page 586
New Tool usage file MOD function in the machine settings
group, see "Tool usage file", page 631
New Set system time MOD function in the systems settings
group, see "Set the system time", page 632
New Graphic settings MOD group, see "Graphic settings",
page 626
With the new cutting data calculator you can calculate the
spindle speed and the feed rate, see "Cutting data calculator",
page 184
With the jump commands new if/then decisions have been
introduced, see "Programming if-then decisions", page 349
The character set of machining Cycle 225 Engraving has been
expanded to include more characters and the diameter sign,
see Cycle Programming User's Manual
New machining Cycle 275 Trochoidal Milling,
see Cycle Programming User's Manual
New Cycle 233 Face Milling,
see Cycle Programming User's Manual
In the drilling cycles 200, 203 and 205 the parameter Q395
DEPTH REFERENCE has been introduced in order to evaluate
the T ANGLE, see Cycle Programming User's Manual
Probing Cycle 4 MEASURING IN 3-D has been introduced,
see Cycle Programming User's Manual

Fundamentals | Control model, software and features
14 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Modified functions 77185x-01
Up to 4 M functions are now allowed in an NC block, see
"Fundamentals", page 426
New soft keys for transferring values have been introduced in
the pocket calculator, see "Operation", page 181
The distance-to-go display can now also be displayed in the
input system, see "Select the position display", page 633
Several input parameters have been added to
Cycle 241 SINGLE-LIP DEEP HOLE DRILLING,
see Cycle Programming User's Manual
Parameter Q305 NUMBER IN TABLE has been added to Cycle
404, see Cycle Programming User's Manual
In the thread milling cycles 26x an approaching feed rate has
been introduced, see Cycle Programming User's Manual
In Cycle 205 Universal Pecking you can now use
parameter Q208 to define a feed rate for retraction,
see Cycle Programming User's Manual

Fundamentals | Control model, software and features
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New functions 77185x-02
Programs with .HU and .HC extensions can be selected and
processed in all operating modes
The functions SELECT PROGRAM and
CALL SELECTED PROGRAM have been introduced, see "Calling
any program as a subprogram", page 325
New FEED DWELL function for programming repeating dwell
times, see "Dwell time FUNCTION FEED", page 471
The control automatically writes upper case letters at the start
of a block, see "Programming path functions", page 262
The D18 functions have been expanded, see "D18 – Reading
system data", page 363
USB data carriers can be locked with the SELinux security
software, see "SELinux security software", page 98
The machine parameter posAfterContPocket (no. 201007) that
influences positioning after an SL cycle has been introduced,
see "Machine-specific user parameters", page 658
Protective zones can be defined in the MOD menu, see
"Entering traverse limits", page 630
Write protection is possible for individual lines in the preset
management, see "Saving presets in the table", page 531
New manual probing function for aligning a plane, see
"Measuring 3-D basic rotation", page 559
New function for aligning the machining plane without rotary
axes, see "Tilting the working plane without rotary axes",
page 506
CAD files can be opened without option number 42, see "Data
Transfer from CAD Files", page 295
New software option 93 Extended Tool Management, see
"Calling tool management", page 234

Fundamentals | Control model, software and features
16 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
Modified functions 77185x-02
The input range of the DOC column in the pocket table has
been expanded to 32 characters, see "Pocket table for tool
changer", page 219
Commands D15, D31 and D32 from predecessor controls no
longer generate ERROR blocks during import. When simulating
or running an NC program with these commands, the control
interrupts the NC program with an error message that helps you
to find an alternative implementation
Miscellaneous functions M104, M105, M112, M114, M124,
M134, M142, M150, M200 - M204 from predecessor controls
no longer generate ERROR blocks during import. When
simulating or running an NC program with these miscellaneous
functions, the control interrupts the NC program with an error
message that helps you to find an alternative implementation,
see "Comparison: Miscellaneous functions", page 693
The maximum file size of files output with D16 F-Print has been
increased from 4 KB to 20 KB
The Preset.PR preset management is write-protected in
Programming operating mode, see "Saving presets in the table",
page 531
The input range of the Q parameter list for defining the QPARA
tab on the status display consists of 132 input positions, see
"Displaying Q parameters (QPARA tab)", page 89
Manual calibration of the touch probe with fewer pre-positioning
movements, see "Calibrating 3-D touch probes ", page 549
The position display takes into account the DL oversizes
programmed in the T block, selectable as an oversize of the
workpiece or tool, see "Delta values for lengths and radii",
page 207
In single block mode the control executes each point individually
with point pattern cycles and G79 PAT, see "Program run",
page 603
Rebooting the control is no longer possible with the END key
but with the RESTART soft key, see "Switch-off", page 516
The control displays the contouring feed rate in manual mode,
see "Spindle speed S, feed rate F and miscellaneous function
M", page 529
Deactivate tilting in manual mode is only possible via the 3D-
ROT menu, see "Activating manual tilting:", page 576
Machine parameter maxLineGeoSearch (no. 105408) has
been increased to max. 50000, see "Machine-specific user
parameters", page 658
The name of software option number 8 has changed, see
"Software options", page 9

Fundamentals | Control model, software and features
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New and modified cycle functions 77185x-02
Cycle G270 CONTOUR TRAIN DATA has been added
Cycle G139 CYL. SURFACE CONTOUR has been added (option
1)
The character set of machining cycle G225 ENGRAVING has
been expanded with the CE character, ß, the @ character and
system time
Cycles G252-G254 have been expanded with the optional
parameter Q439
Cycle G122 ROUGH-OUT has been expanded by the optional
parameters Q401, Q404
Cycle G484 CALIBRATE IR TT has been expanded by the
optional parameter Q536
Further information: Cycle Programming User's Manual

Fundamentals | Control model, software and features
18 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
New functions 77185x-04
New function FUNCTION DWELL for programming a dwell time,
see "Dwell time FUNCTION DWELL", page 473
New function FUNCTION S-PULSE for programming pulsing
shaft speeds, see "Pulsing spindle speed FUNCTION S-PULSE",
page 469
The column KINEMATIC has been added to the tool table, see
"Entering tool data into the table", page 208
The column OVRTIME has been added to the tool table, see
"Entering tool data into the table", page 208
When importing tool data the CSV file may contain additional
table columns not recognized by the control. During import a
message is displayed indicating the unrecognized columns and
informing that these values will not be adopted, see "Importing
and exporting tool data", page 241
Manual probe functions create a line in the preset management
if the specified line does not exist yet, see "Writing measured
values from the touch-probe cycles to the preset table",
page 548
Manual probe functions can write in a password-protected line,
see "Recording measured values from the touch probe cycles",
page 546
During a manual touch probe cycle, control can be transferred
to the handwheel, see "Traverse movements with a handwheel
with display", page 542
Several handwheels can be connected to a control, see
"Traverse with electronic handwheels", page 519
In Electronic handwheel mode of operation, the handwheel
axis for an HR 130 can be selected with the orange axis keys
If the control is set to the INCH unit of measure, the control also
includes movements traversed by the handwheel in INCHES,
see "Traverse with electronic handwheels", page 519
The control differentiates between interrupted or stopped NC
programs. In the interrupted status, the control offers more
intervention options, see "Interrupting, stopping or aborting
machining", page 605
The software option number 42 DXF Converter now also
produces CR circles, see "Basic settings", page 299
With active structuring the structure block can be edited in the
structure window, see "Definition and applications", page 179
Animated help can be selected with the tilt working plane
function, see "Overview", page 481
The D18 functions have been expanded, see "D18 – Reading
system data", page 363
The D16 functions have been expanded, see "D16 – Formatted
output of texts and Q parameter values", page 357
The file saved with SAVE AS is now also found in the file
management under LAST FILES, see "Editing an NC program",
page 136
If you save files with SAVE AS, you can select the target
directory with the SWITCH soft key, see "Editing an NC
program", page 136

Fundamentals | Control model, software and features
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It is possible to search quickly for a file in file management by
entering the first letter, see "Selecting drives, directories and
files", page 148
File management displays vertical scrollbars and supports
scrolling with the mouse, see "Calling the file manager",
page 147
New machine parameter for recreating M7 and M8, see
"Machine-specific user parameters", page 658
The function STRLEN checks whether a string parameter has
been defined, see "Finding the length of a string parameter",
page 408
The function SYSSTR enables the NC software version to be
read out, see "Reading system data", page 405
The function D38 can now be programmed without a code
number
Undefined Q parameters can now be transferred with the
function D00
For jumps with D09, QS parameters and texts are permitted as
conditions, see "Programming if-then decisions", page 349
Cylindrical workpiece blanks can now also be defined with a
diameter instead of a radius, see "Defining the blank: G30/G31",
page 129
The transitional elements G24 and G25 can now also be
executed between 3-D contours, i.e. with straight line blocks
with three programmed coordinates or a helix
The control now supports spatial arcs, i.e. circles in 3 axes
vertical to the working plane, see "Circular path around circle
center ", page 267
Active kinematics is displayed in the 3D-ROT menu, see
"Activating manual tilting:", page 576
In operating modes Program run, single block and Program
run, full sequence the screen layout PROGRAM + SECTS can be
specified, see "Structuring programs", page 179
In operating modes Program Run Full Sequence, Program Run
Single Block and Positioning w/ Manual Data Input, the font
size can be set to the same size as the Programming operating
mode, see "Machine-specific user parameters", page 658
The functions in the Positioning w/ Manual Data Input mode
were expanded and adapted for improved operation, see
"Positioning with Manual Data Input", page 579
Active kinematics is displayed in the operating mode RETRACT,
see "Retraction after a power interruption", page 610
In the RETRACT operating mode, feed-rate limitation can be
deactivated with the CANCEL THE FEED RATE LIMITATION soft
key, see "Retraction after a power interruption", page 610
In the Test Run operating mode a tool usage file can also be
created without simulation, see "Tool usage test", page 226
In the Test Run operating mode you can hide the rapid traverse
movements with the FMAX PATHS soft key, see "3-D view in the
Test Run operating mode", page 590
In the Test Run operating mode you can reset the solid-model
view with the RESET THE VOLUME MODEL soft key, see "3-D
view in the Test Run operating mode", page 590

Fundamentals | Control model, software and features
20 HEIDENHAIN | TNC 320 | ISO Programming User's Manual | 10/2017
In the Test Run operating mode you can reset the tool paths
with the RESET TOOL PATHS soft key, see "3-D view in the Test
Run operating mode", page 590
In the Test Run operating mode the MEASURING soft key
displays the coordinates if you position the mouse on the
graphics, see "3-D view in the Test Run operating mode",
page 590
In the Test Run operating mode the STOP AT soft key simulates
up to a predefined block, see "Test Run up to a certain block ",
page 602
Active basic transformation is shown in the status display on the
POS tab, see "Positions and coordinates (POS tab)", page 88
The status display now also shows the path of the active main
program, see "Overview", page 86, see "General program
information (PGM tab)", page 87
In the status display the CYC tab now also shows T-Max and
TA-Max
Mid-program startup can now be continued, see "Entering the
program at any point: Mid-program startup", page 613
With functions NC/PLC Backup and NC/PLC Restore you can
save and restore single directories or the complete TNC drive,
see "Backup and restore", page 101