HEIDENHAIN TNC 407 User manual

User's Manual
ISO Programming
TNC 426
TNC 425
TNC 415 B
TNC 407
Oktober 1995

Controls on the visual display unit
Toggle display between machining and
programming modes
Split screen layout
Soft keys for selecting functions in screen
Shift keys for the soft keys
Brightness, contrast
Typewriter keyboard for entering letters and symbols
File names/
comments
ISO
programming
Machine operating modes
MANUAL OPERATION
EL. HANDWHEEL
POSITIONING WITH MDI
PROGRAM RUN/SINGLE BLOCK
PROGRAM RUN/FULL SEQUENCE
Programming modes
PROGRAMMING AND EDITING
TEST RUN
Program and file management
Select programs and files
Delete programs and files
(not on TNC 426)
Enter program call in a program
External data transfer
(not on TNC 426)
MODfunctions
Pocket calculator
(TNC 426 only)
Moving the cursor and going directly to
blocks, cycles and parameter functions
Move the cursor (highlight)
Go directly to blocks, cycles and
parameter functions
Override control knobs
Feed rate Spindle speed
Controls on the TNC 426, TNC 425, TNC 415 B and
TNC 407
...
...
Q
R
Y W
E
T
G F S T M
GRAPHICS
TEXT
SPLIT
SCREEN
CR
CT
CHF
RND
APPR
DEP
L
CC
C
R
+
R
TOOL
CALL
TOOL
DEF
R-
L
Programming path movements
(conversational programming only)
Approach/depart contour
Straight line
Circle center/pole for polar coordinates
Circle with center
Circle with radius
Tangential circle
Chamfer
Corner rounding
Tool functions
(conversational programming only)
Enter or call tool length and radius
Activate tool radius compensation
(not on TNC 426)
Cycles, subprograms and program section repeats
(conversational programming only)
Define and call cycles
Enter and call labels for subprogramming
and program section repeats
Enter program stop in a program
Enter touch probe functions in a program
Coordinate axes and numbers, editing
Select coordinate axes or enter
them into a program
Numbers
Decimal point
Arithmetic sign
Polar coordinates
Incremental dimensions
Q parameters for part families or
mathematicalfunctions
Capture actual position
Skip dialog questions, delete words
Confirm entry and resume dialog
End block
Clear numerical entry or TNC message
Abort dialog, delete program sections
+/
NO
ENT
Q
P
CE
DEL
9
V
0
MOD
PGM
CALL
GOTO
1 50
0
50
100
S %
...
CL
PGM
EXT
CYCL
CALL
LBL
SET
LBL
CALL
STOP
TOUCH
PROBE
CYCL
DEF
PGM
MGT
PGM
NAME
CALC
1 50
0
50
100
F %

TNC Guideline
From the workpiece drawing to
program-controlled machining
or
or
or
or
Step Task TNC operating Section in
mode manual
Preparation
1 Select tools —— ——
2 Set workpiece datum for
coordinate system —— ——
3 Determine spindle speeds
and feed rates —— ——
4 Switch on the machine —— 1.3
5 Cross over reference marks 1.3, 2.1
6 Clamp workpiece —— ——
7 Set datum /
Reset position display ...
7a ... with 3D touch probe 2.5
7b ... without 3D touch probe 2.3
Entering and testing part programs
8 Enter part program or download
over external data interface 5 to 8, 9
9 Test part program for errors
3.1
10 Test run: Run the program
block by block without tool 3.2
11 Optimize the part program
(if necessary) 5 to 8
Machining the workpiece
12 Insert tool and run program 3.2

TNC 426/TNC 425/TNC 415 B/TNC 407
How to use this manual
This manual describes functions and features available on TNCs as of the following NC software numbers:
NC Software No.
TNC 407 280 580 04
TNC 415 B, TNC 425 280 540 04
TNC 415 F, TNC 425 E 280 560 04
TNC 426 CA, TNC 426 PA 280 462 01
TNC 426 CE, TNC 426 PE 280 482 01
The suffixes E and F indicate export versions of the TNC.
The export versions TNC 415 F, TNC 425 E, TNC 426 CE, and
TNC 426 PE have the following limitations:
• Input and machining accuracy are limited to 1 µm
• Simultaneous linear movement in up to 4 axes
Some of the functions described in this manual are not available on all
TNCs. These functions are marked with symbols:
Function not available on the TNC 407
Function not available on the TNC 415
Function not available on the TNC 425
Function not available on the TNC 426
The machine manufacturer adapts the features offered by the TNC to the
capabilities of the specific machine tool by setting machine parameters.
This means that not every machine tool will have all of the functions
described in this manual.
Some of the TNC functions which are not available on every machine are:
• Probe functions for the 3D touch probe
• Digitizing option
(conversational programming only)
• Measuring tools with the TT 120 touch probe
(conversational programming only)
• Rigid tapping
• Re-approaching a contour after an interruption
Your machine manual provides more detailed information. If you think a
function may be unavailable because of a defect, please contact the
machine tool builder.
Many machine manufacturers and HEIDENHAIN offer programming
courses for the TNCs. We recommend these courses as an effective way
of improving your programming skill and sharing information and ideas with
other TNC users.
407
415
425
426

TNC 426/TNC 425/TNC 415 B/TNC 407
This manual is intended both for the TNC beginner and the TNC expert.
The TNC beginner can use it as a step-by-step workbook. The manual
begins with an explanation of the basics of numerical control (NC) and
provides a glimpse into their application in the TNC. It then introduces
the technique of conversational programming. All of the examples can
be practiced directly on the TNC. Each function is explained thoroughly
when it is used for the first time.
The TNC beginner should work through this manual completely from
beginning to end to ensure that he is capable of fully exploiting the
features of this powerful tool.
The TNC expert can use the manual as a comprehensive review and
reference work. The table of contents and numerous cross references
help him quickly find the topics and information he needs. Easy-to-read
dialog flowcharts show him how to enter data for the desired function.
The dialog flowcharts aid the beginner by providing a description of the
function of each key in a box to its right. If the user already knows the
keys, he can concentrate on the illustrated input overview at the left of
the flowchart. The TNC dialog messages are represented in shaded
boxes above the answering input sequence.

TNC 426/TNC 425/TNC 415 B/TNC 407
Layout of the dialog flowcharts
Dialog initiation key
DIALOG PROMPT (ON THE TNC SCREEN)
Here the manual explains the function of the keys.
NEXT DIALOG PROMPT
Function of the key
Function of the alternative key
The trail of points means that:
• the dialog is not completely illustrated, or
• the dialog continues on the next page.
Abbreviated dialog flowcharts
In abbreviated flowcharts an arrow (➤) is used to indicate new entries or
worksteps.
e.g.
Press this key
Or this key
Answer the prompt with
these keys
.
.
.
+/
A broken line indicates that
either the key above it or
below it can be pressed.
G
83
ENT
83

1
2
3
4
5
6
7
8
9
10
11
Contents User's Manual TNC 407, TNC 415 B, TNC 425, TNC 426
(280 5x0-xx, 280 462-xx)
ISO Programming
Introduction
Manual Operation and Setup
Test Run and Program Run
Programming
Programming Tool Movements
Subprograms and Program Section Repeats
Programming with Q Parameters
Cycles
External Data Transfer
MOD-Functions
Tabels, Overviews and Diagrams

TNC 426/TNC 425/TNC 415 B/TNC 407
1 Introduction
1.1 The TNC 400 Series ............................................................................1-2
Keyboard........................................................................................................................ 1-4
Visual display unit .......................................................................................................... 1-5
TNC Accessories ........................................................................................................... 1-9
1.2 Fundamentals of NC.........................................................................1-10
Introduction .................................................................................................................. 1-10
What is NC? ................................................................................................................. 1-10
The part program .........................................................................................................1-10
Programming ............................................................................................................... 1-10
Reference system ........................................................................................................ 1-11
Cartesian coordinate system ....................................................................................... 1-11
Additional axes............................................................................................................. 1-12
Polar coordinates .........................................................................................................1-12
Setting the pole ............................................................................................................ 1-13
Datumsetting ............................................................................................................... 1-13
Absolute workpiece positions.......................................................................................1-15
Incremental workpiece positions ..................................................................................1-15
Programming tool movements ..................................................................................... 1-18
Position encoders ........................................................................................................ 1-18
Reference marks......................................................................................................... 1-18
1.3 Switch-On ..........................................................................................1-19
1.4 Graphics and Status Displays .........................................................1-20
Graphics during program run ....................................................................................... 1-20
Plan view...................................................................................................................... 1-21
Projection in 3 planes................................................................................................... 1-22
Cursor position during projection in 3 planes ............................................................... 1-23
3D view ........................................................................................................................ 1-23
Magnifying details ........................................................................................................ 1-25
Repeating graphic simulation....................................................................................... 1-26
Measuring the machining time ..................................................................................... 1-26
Status displays ............................................................................................................. 1-27
Additional status displays.............................................................................................1-27
1.5 File Management on the TNC 426 ...................................................1-30
Data security ................................................................................................................ 1-30
Calling the file manager ............................................................................................... 1-31
Functions for file management..................................................................................... 1-35
Selecting file types .......................................................................................................1-36
To copy individual files ................................................................................................. 1-36
To copy several files into another directory ................................................................. 1-37
To erase a file ..............................................................................................................1-38
To rename a file ........................................................................................................... 1-38
To protect a file ............................................................................................................ 1-38
To cancel file protection ...............................................................................................1-38
To convert a file ........................................................................................................... 1-39

TNC 426/TNC 425/TNC 415 B/TNC 407
1.6 File Management on the TNC 425, TNC 415 B and TNC 407 ........1-40
File directory ................................................................................................................ 1-40
File status.....................................................................................................................1-41
Selecting a file.............................................................................................................. 1-41
To copy a file................................................................................................................ 1-42
To erase a file ..............................................................................................................1-42
To rename a file ........................................................................................................... 1-42
To protect a file ............................................................................................................ 1-42
To cancel file protection ...............................................................................................1-42
To convert a file ........................................................................................................... 1-43
File management for files on external data media ....................................................... 1-43

TNC 426/TNC 425/TNC 415 B/TNC 407
2 Manual Operation and Setup
2.1 Moving the Machine Axes...................................................................2-2
Traversing with the machine axis direction buttons................................................... 2-2
Traversing with an electronic handwheel .................................................................. 2-3
Using the HR 330 electronic handwheel ................................................................... 2-3
Incremental jog positioning........................................................................................ 2-4
Positioning with manual data input (MDI) .................................................................. 2-4
2.2 Spindle Speed S, Feed Rate F and Miscellaneous Functions M.....2-5
To enter the spindle speed S .................................................................................... 2-5
To change the spindle speed S ................................................................................. 2-5
To change the feed rate F .........................................................................................2-6
To enter a miscellaneous function M......................................................................... 2-6
2.3 Setting the Datum Without a 3D Touch Probe ..................................2-7
Setting the datum in the tool axis .............................................................................. 2-7
To set the datum in the working plane ...................................................................... 2-8
2.4 3D Touch Probes .................................................................................2-9
3D Touch probe applications..................................................................................... 2-9
To select the touch probe functions .......................................................................... 2-9
Calibrating the 3D touch probe................................................................................ 2-10
Compensating workpiece misalignment .................................................................. 2-12
2.5 Setting the Datum with a 3D Touch Probe ......................................2-14
To set the datum in an axis ..................................................................................... 2-14
Corner as datum ......................................................................................................2-15
Circle center as datum ............................................................................................ 2-17
2.6 Measuring with a 3D Touch Probe ...................................................2-20
To find the coordinates of a position on an aligned workpiece................................ 2-20
Finding the coordinates of a corner in the working plane ........................................ 2-20
Measuring workpiece dimensions ........................................................................... 2-21
Measuring angles .................................................................................................... 2-22
2.7 Tilting the Working Plane .................................................................2-24
Traversing reference points with tilted axes ............................................................ 2-25
Setting the datum in a tilted coordinate system....................................................... 2-25
Position display in the tilted system......................................................................... 2-25
Limitations on working with the tilting function ........................................................ 2-25
To activate manual tilting......................................................................................... 2-26

TNC 426/TNC 425/TNC 415 B/TNC 407
3 Test Run and Program Run
3.1 Test Run ...............................................................................................3-2
To run a program test ................................................................................................ 3-2
To run a program test up to a certain block............................................................... 3-3
The display functions for test run .............................................................................. 3-3
3.2 Program Run ........................................................................................3-4
To run a part program ............................................................................................... 3-4
Interrupting machining ............................................................................................... 3-5
Moving machine axes during an interruption............................................................. 3-6
Resuming program run after an interruption ............................................................. 3-6
Mid-program startup .................................................................................................. 3-8
Returning to the contour ............................................................................................ 3-9
3.3 Optional Block Skip...........................................................................3-10
3.4 Blockwise Transfer: Testing and Running Long Programs ..........3-11

TNC 426/TNC 425/TNC 415 B/TNC 407
4 Programming
4.1 Creating Part Programs ......................................................................4-2
Layout of a program .................................................................................................. 4-2
Editing functions ........................................................................................................ 4-3
4.2 Tools .....................................................................................................4-5
Setting the tool data ..................................................................................................4-5
Oversizes for lengths and radii: delta values ............................................................ 4-6
Entering tool data into the program ........................................................................... 4-7
Entering tool data in tables ........................................................................................ 4-8
Tool data in tables ................................................................................................... 4-10
Pocket table for tool changer................................................................................... 4-14
Calling tool data .......................................................................................................4-15
Tool change .............................................................................................................4-15
Automatic tool change: M101 ..................................................................................4-16
4.3 Tool Compensation Values ..............................................................4-17
Effect of tool compensation values.......................................................................... 4-17
Tool radius compensation .......................................................................................4-17
Machining corners ................................................................................................... 4-19
4.4 Program Creation ..............................................................................4-20
Defining the blank form ........................................................................................... 4-20
To create a new part program .................................................................................4-21
4.5 Entering Tool-Related Data ..............................................................4-23
Feed rate F ..............................................................................................................4-23
Spindle speed S ......................................................................................................4-24
4.6 Entering Miscellaneous Functions and Program Stop ..................4-25
4.7 Actual Position Capture ....................................................................4-26
4.8 Integrated Pocket Calculator ............................................................4-27
4.9 Marking Blocks for Optional Block Skip .........................................4-28
4.10 Text Files ............................................................................................4-29
Finding text sections ................................................................................................4-31
To erase and insert characters, words and lines..................................................... 4-32
Editing text blocks ................................................................................................... 4-33
4.11 Creating Pallet Files ..........................................................................4-35
4.12 Adding Comments to the Program ..................................................4-37
Adding comments to program blocks ...................................................................... 4-37

TNC 426/TNC 425/TNC 415 B/TNC 407
5 Programming Tool Movements
5.1 General Information on Programming Tool Movements .................5-2
5.2 Contour Approach and Departure .....................................................5-4
Starting point and end point ......................................................................................5-4
Tangential approach and departure .......................................................................... 5-6
5.3 Path Functions.....................................................................................5-7
General information ................................................................................................... 5-7
Machine axis movement under program control ....................................................... 5-7
Overview of path functions ........................................................................................ 5-9
5.4 Path Contours – Cartesian Coordinates .........................................5-10
G00: Straight line with rapid traverse ...................................................................... 5-10
G01: Straight line with feed rate F ... ....................................................................... 5-10
G24: Chamfer .......................................................................................................... 5-13
Circles and circular arcs .......................................................................................... 5-15
Circle center I, J, K .................................................................................................. 5-16
G02/G03/G05: Circular path around pole I, J, K ..................................................... 5-18
G02/G03/G05: Circular path with defined radius..................................................... 5-21
G06: Circular path with tangential connection ......................................................... 5-24
G25: Corner rounding.............................................................................................. 5-26
5.5 Path Contours – Polar Coordinates .................................................5-28
Polar coordinate origin: Pole I, J, K ......................................................................... 5-28
G10: Straight line with rapid traverse ..................................................................... 5-28
G11: Straight line with feed rate F … ...................................................................... 5-28
G12/G13/G15: Circular path around pole I, J, K ..................................................... 5-30
G16: Circular path with tangential transition ............................................................5-32
Helical interpolation ................................................................................................. 5-33
5.6 M Functions for Contouring Behavior and Coordinate Data ........5-36
Smoothing corners: M90 ......................................................................................... 5-36
Machining small contour steps: M97 ....................................................................... 5-37
Machining open contours: M98 ............................................................................... 5-38
Programming machine-referenced coordinates: M91/M92 ..................................... 5-39
Feed rate factor for plunging movements: M103 F… .............................................. 5-40
Feed rate at circular arcs: M109/M110/M111.......................................................... 5-41
Insert rounding arc between straight lines: M112 E... ............................................. 5-41
Automatic compensation of machine geometry when working with
tilted axes: M114 ..................................................................................................... 5-42
Feed rate in mm/min on rotary axes A, B, C: M116 ................................................ 5-43
Reduce display of a rotary axis to a value less than 360°: M94.............................. 5-43
Optimized traverse of rotary axes: M126 ................................................................ 5-44
5.7 Positioning with Manual Data Input: System File $MDI .................5-45

TNC 426/TNC 425/TNC 415 B/TNC 407
6 Subprograms and Program Section Repeats
6.1 Subprograms .......................................................................................6-2
Operating sequence .................................................................................................. 6-2
Operating limitations .................................................................................................. 6-2
Programming and calling subprograms ..................................................................... 6-3
6.2 Program Section Repeats ...................................................................6-5
Operating sequence .................................................................................................. 6-5
Programming notes ................................................................................................... 6-5
Programming and executing a program section repeat ............................................ 6-5
6.3 Program as Subprogram ....................................................................6-8
Operating sequence .................................................................................................. 6-8
Operating limitations .................................................................................................. 6-8
Calling a program as a subprogram .......................................................................... 6-8
6.4 Nesting .................................................................................................6-9
Nesting depth ............................................................................................................ 6-9
Subprogram within a subprogram ............................................................................. 6-9
Repeating program section repeats ........................................................................ 6-11
Repeating subprograms ..........................................................................................6-12

TNC 426/TNC 425/TNC 415 B/TNC 407
7 Programming with Q Parameters
7.1 Part Families — Q Parameters in Place of Numerical Values .........7-4
7.2 Describing Contours Through Mathematical Functions .................7-7
Overview ................................................................................................................... 7-7
7.3 Trigonometric Functions ..................................................................7-10
Overview .................................................................................................................7-10
7.4 If-Then Decisions with Q Parameters ..............................................7-11
Jumps ..................................................................................................................7-11
Overview .................................................................................................................7-11
7.5 Checking and Changing Q Parameters ...........................................7-13
7.6 Diverse Functions .............................................................................7-14
Displaying error messages ...................................................................................... 7-14
Output through an external data interface ............................................................... 7-16
Formatted output of texts and Q parameter values ................................................. 7-17
Reading system data............................................................................................... 7-18
Transfer to the PLC ................................................................................................. 7-19
7.7 Entering Formulas Directly...............................................................7-20
Overview of functions .............................................................................................. 7-20
7.8 Measuring with the 3D Touch Probe During Program Run ...........7-23
7.9 Programming Examples ...................................................................7-25
Rectangular pocket with island, corner rounding and tangential approach ............. 7-25
Bolt hole circles .......................................................................................................7-27
Ellipse .................................................................................................................. 7-29
Hemisphere machined with end mill ........................................................................7-31

TNC 426/TNC 425/TNC 415 B/TNC 407
8 Cycles
8.1 General Overview of Cycles ...............................................................8-2
Programming a cycle................................................................................................. 8-2
Dimensions in the tool axis........................................................................................ 8-3
8.2 Simple Fixed Cycles ............................................................................8-4
PECKING (G83) ........................................................................................................ 8-4
TAPPING with floating tap holder (G84) ................................................................... 8-6
RIGID TAPPING (G85) ............................................................................................. 8-8
THREAD CUTTING (G86) ........................................................................................ 8-9
SLOT MILLING (G74) .............................................................................................8-11
POCKET MILLING (G75/G76) ................................................................................ 8-13
CIRCULAR POCKET MILLING (G77/G78) ............................................................. 8-15
8.3 SL Cycles (Group I) ...........................................................................8-17
CONTOUR GEOMETRY (G37) .............................................................................. 8-18
ROUGH-OUT (G57) ................................................................................................ 8-19
Overlapping contours .............................................................................................. 8-21
PILOT DRILLING (G56) .......................................................................................... 8-27
CONTOUR MILLING (G58/G59) .............................................................................8-28
8.4 SL Cycles (Group II) ..........................................................................8-31
CONTOUR DATA (G120) ....................................................................................... 8-32
PILOT DRILLING (G121) ........................................................................................ 8-33
ROUGH-OUT (G122) .............................................................................................. 8-34
FLOOR FINISHING (G123)..................................................................................... 8-34
SIDE FINISHING (G124) .........................................................................................8-35
CONTOUR TRAIN (G125) ...................................................................................... 8-37
CYLINDER SURFACE G127 .................................................................................. 8-39
8.5 Coordinate Transformations ............................................................8-42
DATUM SHIFT (G54) .............................................................................................. 8-43
DATUM SHIFT with datum tables (G53) .................................................................8-45
MIRROR IMAGE (G28) ........................................................................................... 8-48
ROTATION (G73) .................................................................................................... 8-50
SCALING FACTOR (G72)....................................................................................... 8-51
8.6 Other Cycles ......................................................................................8-53
DWELL TIME (G04) ................................................................................................ 8-53
PROGRAM CALL (G39).......................................................................................... 8-53
ORIENTED SPINDLE STOP (G36) ........................................................................ 8-54
WORKING PLANE (G80) ........................................................................................ 8-55

TNC 426/TNC 425/TNC 415 B/TNC 407
9 External Data Transfer
9.1 Data Transfer with the TNC 426 .........................................................9-2
To copy individual files into the TNC ......................................................................... 9-2
To copy multiple files into the TNC ............................................................................ 9-3
Copying files out of the TNC ..................................................................................... 9-3
9.2 Data Transfer with the TNC 425, TNC 415 B and TNC 407...............9-4
Selecting and transferring files .................................................................................. 9-5
Blockwisetransfer ..................................................................................................... 9-6
9.3 Pin Layout and Connecting Cable for the Data Interfaces ..............9-7
RS-232-C/V.24 Interface ........................................................................................... 9-7
RS-422/V.11 Interface ............................................................................................... 9-9
9.4 Preparing the Devices for Data Transfer .........................................9-10
HEIDENHAIN devices ............................................................................................. 9-10
Non-HEIDENHAIN devices ..................................................................................... 9-10

TNC 426/TNC 425/TNC 415 B/TNC 407
10 MOD Functions
10.1 Selecting, Changing and Exiting the MOD Functions ...................10-3
10.2 Software Numbers and Option Numbers ........................................10-3
10.3 Code Numbers ...................................................................................10-3
10.4 Setting the External Data Interfaces ................................................10-4
Setting the RS-232 interface ................................................................................... 10-4
Setting the RS-422 interface ................................................................................... 10-4
Selecting the OPERATING MODE.......................................................................... 10-4
Setting the BAUD RATE .......................................................................................... 10-4
ASSIGN .................................................................................................................. 10-5
10.5 Machine-Specific User Parameters..................................................10-6
10.6 Showing the Workpiece in the Working Space ..............................10-6
Overview of functions .............................................................................................. 10-7
10.7 Position Display Types .....................................................................10-8
10.8 Unit ofMeasurement .........................................................................10-9
10.9 Programming Language for $MDI ....................................................10-9
10.10 Selecting the Axes for Generating L Blocks
(conversational programming only) ................................................10-9
10.11 Axis Traverse Limits .......................................................................10-10
10.12 HELP files .........................................................................................10-11

TNC 426/TNC 425/TNC 415 B/TNC 407
11 Tables, Overviews and Diagrams
11.1 General User Parameters ..................................................................11-2
Input possibilities for machine parameters .............................................................. 11-2
Selecting general user parameters ......................................................................... 11-2
External data transfer .............................................................................................. 11-3
3D touch probes and digitizing ................................................................................ 11-4
TNC displays, TNC editor........................................................................................ 11-7
Machining and program run .................................................................................. 11-13
Electronic handwheel ............................................................................................ 11-15
11.2 Miscellaneous Functions (M Functions) .......................................11-16
Miscellaneousfunctions withpredetermined effect ............................................... 11-16
Vacant miscellaneous functions ............................................................................ 11-18
11.3 Preassigned Q Parameters .............................................................11-19
11.4 Features, Specifications and Accessories....................................11-21
Accessories ........................................................................................................... 11-24
11.5 TNC Error Messages .......................................................................11-26
TNC error messages during programming ............................................................11-26
TNC error messages during test run and program run ......................................... 11-27
11.6 Address Letters (ISO)......................................................................11-31
Parameter definitions ............................................................................................ 11-34

TNC 426/TNC 425/TNC 415 B/TNC 4071-2
1 Introduction
1.1 The TNC 400 Series
The TNCs are shop-floor programmable contouring controls for boring
machines, milling machines and machining centers with up to 5 axes.
They also feature oriented spindle stop.
Two operating modes are always active simultaneously: one for machine
movements (machining modes) and one for programming or program
testing (programming modes).
TNC 426
The TNC 426 PA features digital control of machine axis speed. This
provides high geometrical accuracy, even with complex workpiece
surfaces and at high machining speeds.
An integrated 170 megabyte hard disk provides storage for programs that
were created on external devices. The TNC 426 also offers an on-screen
pocket calculator.
TNC 425
The TNC 425 also features digital control of machine axis speed. This
results in high geometrical accuracy, even with complex workpiece
surfaces and at high machining speeds.
TNC 415 B
The TNC 415 B uses an analog method of speed control in the drive
amplifier. All the programming and machining functions of the TNC 425
are also available on the TNC 415 B.
TNC 407
The TNC 407 uses an analog method of speed control in the drive
amplifier. Some functions are not available on the TNC 407, such as:
• Graphics during program run
• Tilting the machining plane
• Linear movement in more than three axes
Technical differences between the TNCs
TNC 426 PA TNC 426 CA TNC 425 TNC 415 B TNC 407
Speed control Digital Analog Digital/analog Analog Analog
Block processing time 4 ms 4 ms 4 ms 4 ms 24 ms
Control loop cycle time:
Contouring interpolation 3 ms 3 ms 3 ms 2 ms 6 ms
Control loop cycle time:
Fine interpolation 0.6 ms --- 0.6 ms 0.6 ms ---
Program memory 170 M byte 170 M byte 256 K byte 256 K byte 128 K byte
(hard disk) (hard disk)
Input resolution 0.1 µm 0.1 µm 0.1 µm 0.1 µm 1 µm