HEIDENHAIN TNC 135 B Bedienungsanleitung

HEIDENHAW

Mounting Instructions and

Interface Circuit Control-Machine

Control HEIDENHAIN TNC 135B

CONTENTS

1. Introduction

1.1 General remarks

2. Coding switches for measuring directions, ramp configuration and length

and displays (diagram) 7

3. Available Software versions ppp 8

4. Software versions: Common drive with swiizhed-over plosition loop

4.1 Common drive with backlash

4.2 Common drive backlash-free

5.1

5.1 .l

5.1.2

5.2

Software version: Single axis drive with linear interpolation

Remarks

“Axis speed Code” for Kv-adjustment with position loop

having linear interpolation

Adjustment of trailing error (lag)

Linear interpolation with cut-out of positioning loop -

6.1

6.2

6.3

6.4

6.5

6.6

6.7

Control-inpvtsp-.&---p22

External Q C. Voltage 22

Technical specifications of Relay Coils -

External buttons: “Start”,“Stop” and “rapid traverse” _

Feedback “Auxiliary function completed”

Feed rate-Release -

Limit switch-inputs

Inputs for EMERGENCY STOP-function check ~

7. Control -Relay Outputs

7.1 Technical specifications of relay outputs.. 29

7.2

7.3

7.4

7.5

0utput”EMERGENCY STOP”

Lock for “Spindle on” output

Output: TNC in “program run”-mode -

Output: Control in Auto/Manual mode _

8.1

8.1.1

8.1.2

8.1.3

8.2

8.3

M-T-S-functions 32

M-functions (Auxiliary functions) 32

Coded of M-functions 32

output

Direct of M-functions 35

output

Special M-functions which affect program run 36

T-functions (Tool numbers) 37

S-functions (spindle speeds) 38

9. Fixed Program CJC& ~_______~ 41

10.2

10.3

Baud Rate entry 44

Operating procedure for data transfer - 44

11. Transducers ppp 46

11.1 Code switches for counting direction _ 46

11.2 Encoders for TNC 135 B 46

11.3 Encoders for TNC 135 RT. 47

12.

12.1

12.1.1

12.1.2

12.1.3

12.1.4

12.1.5

12.2

12.2.1

12.2.2

12.2.3

12.3

12.3.1

12.3.2

12.3.3

12.3.4

12.3.5

12.3.6

Starting procedure of a machine with a TNC 135 B control 48

Checks before switch-on 48

Voltage change-over check 48

Cooling the TNC unit 4%

Checking the transducer cable 48

Grounding of auxiliary voltage Y 52

Grounding of nominal value input at servo-amplifier 52

Switching on the interface cabinet (without TNC) _ 52

Checking the external D .C. voltage - 52

Checking the limit switches 52

Set-up of D.

C. drive amplifiers (adjustment of rapid1 traverses) 52

TNC-Commissioning 53

Initial starting

procedure 53

Checking measuring direction of transducer in “manual” operating mode 64

Checking of traversing direction in controlled operating mode 65

Matching of ramp length 65

Offset-adjustment 65

Trailing error (lag) adjustment 65

13. Initial starting procedure - check list _-- 66

14. Technical Specifications 69

15. Connections 72

15.1 Connections TNC 135 B 72

15.2 Connections TNC 135 RT 72

16. Layout of terminal clamps within TNC terminal box t 74

17.

17.1

17.2

17.3

Dimensions

Control unit

Visual display unit

Adapter cables

Introduction _

The Control TNC 135 B is a 3-axis Manual Data Input (MDI) control. It has been

designed for direct programming on the machine by the machine operator. For this

reason, some of its details purposely deviate from established programming standards.

Special attention has been given to simple operation and a clear arrangement of the

control panel. For this reason, no attempt has been made to save on the number of

displays

The keys have been allocated to three groups and care has been taken that keys

do not have “double functions”.

Hardware variants

The following versions of TNC 135 are available.

TNC 135 B For connection of linear encoders with 20 pm grating period or

rotary encoders.

The earlier control types TNC 135 S and TNC 135 ST has a signal evaluation for

the connection of linear encoders with 40 pm grating period.

TNC 135 RT For the connection of linear encoders with 100 pm grating period

or for cables longer than 20 m (66 ft). The encoder inputs are

designed for square-wave signals.

For dialogue and program display, the TNC 135 B has a VDU (visual display unit)

instead of the plain dialogue display window.

The independent VDU is connected to the rear of the TNC 135 B control.

The VDU displays 8 lines each having 32 characters.

In order to obtain a clearer VDU-display, certain items of information are

displayed brighter or invertedly (brightne!ss adiustment with the right-hand

potentiometer on the front panel ; the basic brightness is adjusted with the

left-hand potentiometer).

Line

Displayed information Display image

Dialogue line (Dialogue for programming,

error/fauI t indication)

Program block display (N-l )

Current program block (N) and c:ursor function

Editing Iine

Program block display (N+l)

Program block display (N+2)

Cycle display: call up via s:

Display: last selected tool

green background

normal

bright

green background

normal

bright

Display for

position values

Display for

entrv values

Keyboard for entry

values and

axis selection

- Programming and

operating keys

- Operating

mode keys

- Feedrate override

The programming procedure is “dialogue-gui’ded” i.e. thfe necessary data

required for program entry is asked for by the TNC 135 B - in the correct

sequence - via the plain language display.

The TNC 135 B has the following facilities:

mm/inch instant conversion

. Tool compensation (radius and Ieng th)

. Programming of feed rates, rapid traverse, spindle speeds in mm/min

(or 0.1 in./min or rpm)

. Subprograms, program part repeats, ,‘ixed program cycles and M-, S- and

T-functions.

TNC 135 B - Programming can be performed in the following ways:

. with stationary machine in accordanize with a workpiece drawing or

program sheet,

. by “keying in” mlues prior to automatic machinling of the first workpiece of

a batch or series,

. by transferring actual machine position data during the automatic or conventional

machining of a workpiece blank cplayback”).

. external programming via the V,24 input/output,,

This input/output enables the connection of a magnetic tape storage unit,

or a punched tape unit, or telex, or printer or any other compatible

peripheral equipment,

After program entry into the

after the other.

Please note:

TNC 135 B operation is explai ned in the TNC 135 B “Operating Manual”.

TNC-memory, workpieces can be machined one

1.1 Gen,eral remarks

Caution ! All inputs and outputs of the ‘TNC control should be connected

to electric circuits which generate voltages in accordance with

VDE 0100/5,73 8 (G erman standard, protective low voltage).

Do not engage or disengage any plug connections whilst unit is under power !

NC machines also require the necessary safety devices as used on manually

operated machines (e.g. limit switches, ;Emergency STOP” buttons etc.).

The proper functioning of the devices should be checked before commencing

operation !

2. Coding switches for rneasuringdirections

ramp configuration and length and displays

(d i a g r a m)

The code switch with 8 channels is located within the terminal box at the rear

of the TNC. ’

The setting of the channels is mentioned in the appropriate sections,

Please note:

In future a toggle switch might be used in place of the slide switch.

The switch positions (switch open or closed) for both types are indicated in the

following diagram.

closed-

open op'en

In this manual only the slide switch is referred to, Setting of the toggle switch is

carried ous correspondingly O

3. Available Software versions1

Four basic software versions are available which were (designed for various

operating modes.

The TNC 135 t3 are suitable for:

Common drive with switched-over position loops - without backlash

Common drive with switched-over position loops - with backlash

Single-axis drives with linear ini*erpolation - position loops switched off

(simultaneous positioning in two axes possible)

Single-axis drives with linear interpolation - permanently closed

position loops (simultaneous positioning in two axes possible)

Moreover, the controls are available with the following dialogue languages:

English

German

French

Italian

Portugnese

Russian

Technical details of each software version are dealt with in items 4 and 5.

The descriptions in the remaining items are valid for all TNC-versions.

4. Software version: C 0 ni m 0 n drive with

switched-over position I 0 0 p

With this design, the control can be used with a common drive and three

electrically-activated axis clutches or wi’th three single axis drives with a

common servo amp1 ifier .

With common drive, the axis release relays activate the axis clutches and the

servo-amplifier simultaneously. With single axis drives with common servo-amplifier,

the motor and tacho-generator of each axis is switched to the servo-amplifier.

Only when this procedure is completely ended may the servo-amplifier relebse be

activated (e.g. external time delay < 200 ms).

After reaching the nominal position , the cut-out procedure takes place in reverse

order:

Inactivation of servo-amp1 ifier release, then cut-out of drive and tacho-generator

from servo-amp1 ifier.

Caution :

The tacho-generators should not (if possibile) be switched via the relay contacts,

Due to the tacho-generator only supplying one signal,, it is recommended that a

combined circuit should be formed from the three tacho-signals.

Please note:

The requirements of the servo-amplifier manufacturer

Imust

be observed,

Two software versions are available for oFleration with switched-over position

loop:

. for drive spindles with backlash

. for backlash-free drive spindles (bal l-screw spindles with direct coupling to

axis drives)

4.1 Common drive with b a c k I a s h

TNC: 135 B

Software: Dialogue German 214 367

English 214 368

French 214 369

Italian 214 370

Portugnese 214 379

Russian 214 383

Suitable servo-amplifiers:

4-quadrant units,

2 and l-quadrant units (Polarity of drive trnd tacho-generator are determined by the

relay output “positioning direction”)

Switch-over from 4-quadrant to 1-quadran!, or 2-quadrant operation with the code

switch of the third channel.

3 3

channel I

drive type : 1 or ri!-quadr. 4-quadr .

3 servo-amp1 . servo-amp1 .

Multiooint-Connector Layout

TNC

Machine

Multipoint

Connector

J 1

+/-

O V _

1 Analogue output X, Y, Z

l!/fisz

-x

-Y

Release

-z

- + 24 V - supply

Mul tipoin t

Connector

Positil2ning direction (only with common

- + 24 \&upply drives with backlash)

Owing to the backlash-prone drive spindle the positioninlg direction is determined

before the positioning procedure and held constant for thle positioning period.

With the “Override’‘-potentiometer no machine standstill can be achieved with this

positioning loop (offset-v01 tage).

Time sequence of a positioning procedure wi\;hout auxiliary function output

After start (manual or automatic) the corresponding axis release relay becomes

active without time delay, 300 ms later, the velocity-nominal value increases

(analogue output X, Y, Z) according .to a ramp function until the voltage level of

the programmed feedrate has been reached. ‘Nhen nearing the position value, the

velocity-nominal value is decreased according to a ramp function.

When the position value has been reached, ‘the position lloop is-opened (axis

relay breaks, the nominal value output remains at OV). A new start is inhibited

for a period of 100 ms.

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