HEIDENHAIN TNC 640 User manual

TNC 640
User’s Manual
ISO programming
NC Software
340590-08
340591-08
340595-08
English (en)
10/2017

Controls and displays
2HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
Controls and displays
Keys
If you are using a TNC 640 with touch control, you can
replace some keystrokes with hand-to-screen contact.
Further information: "Operating the Touchscreen",
page 127
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
Alphanumeric keyboard
Key Function
File names, comments
DIN/ISO programming
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 640 | 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
Open the batch process manager
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 640 | 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 640 | 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 640 | 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 640 340590-08
TNC 640 E 340591-08
TNC 640 Programming Station 340595-08
The suffix E indicates the export version of the control. The
following software options are unavailable or only available to a
limited extent in the export version:
Advanced Function Set 2 (option 9) limited to four-axis
interpolation
KinematicsComp (option 52)
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: 892905-xx

Fundamentals | Control model, software and features
HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017 9
Software options
The TNC 640 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 (options 0 to 7)
Additional axis Additional control loops 1 to 8
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
Advanced Function Set 2 (option 9)
Expanded functions Group 2
Export license required
3-D machining:
Motion control with minimum jerk
3-D tool compensation through surface-normal vectors
Using the electronic handwheel to change the angle of
the swivel head during program run without affecting the
position of the tool center point (tool tip or center of sphere)
(TCPM = Tool Center Point Management)
Keeping the tool normal to the contour
Tool radius compensation perpendicular to traversing direction and
tool direction
Interpolation:
Linear in 6 axes
HEIDENHAIN DNC (option 18)
Communication with external PC applications over COM component
Display Step (option 23)
Display step Input resolution:
Linear axes down to 0.01 µm
Rotary axes to 0.00001°
Dynamic Collision Monitoring – DCM (option 40)
Dynamic Collision Monitoring The machine manufacturer defines objects to be monitored
Warning in Manual operation
Collision monitoring in the Test Run mode
Program interrupt in Automatic operation
Includes monitoring of 5-axis movements

Fundamentals | Control model, software and features
10 HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017
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
Adaptive Feed Control – AFC (option 45)
Adaptive Feed Control Milling:
Recording the actual spindle power by means of a teach-in cut
Defining the limits of automatic feed rate control
Fully automatic feed control during program run
Turning (option 50):
Cutting force monitoring during machining
KinematicsOpt (option 48)
Optimizing the machine kinematics Backup/restore active kinematics
Test active kinematics
Optimize active kinematics
Mill-Turning (option 50)
Milling and turning modes Functions:
Switching between Milling/Turning mode of operation
Constant surface speed
Tool-tip radius compensation
Turning cycles
Cycle 880: Gear hobbing (option 50 and option 131)
KinematicsComp (option 52)
Three-dimensional compensation
Export license required
Compensation of position and component errors
3D-ToolComp (option 92)
3-D tool radius compensation
depending on the tool’s contact
angle
Export license required
Compensate the deviation of the tool radius depending on the tool’s
contact angle
Compensation values in a separate compensation value table
Prerequisite: Working with surface normal vectors (LN blocks)
Extended Tool Management (option 93)
Extended tool management Python-based
Advanced Spindle Interpolation (option 96)
Interpolating spindle Interpolation turning:
Cycle 291: Interpolation turning, coupling
Cycle 292: Interpolation turning, contour finishing