Techna-Tool BK MIKRO 5-RL Mode d’emploi

Tool Monitoring System

Technical Documentation -North American Edition

Revision 2.0

Released: April, 1997

553 Industrial Dr. Hartland, WI 53029 262-367-8665 fax 262-367-0208

web-site www.techna-tool.com email techtool@techna-tool.com

BK MIKRO 5-RL

Contents

BK MIKRO 5-RL Page 1

Contents

1. DESCRIPTION......................................................................................................................................3

2. SYSTEM COMPONENTS.......................................................................................................................4

2.1. CONTROL UNIT......................................................................................................................................4

2.1.1. Characteristic Properties................................................................................................................4

2.1.2. Technical Data..............................................................................................................................5

2.1.3. Scanner Socket............................................................................................................................5

2.1.4. Screw Terminals ...........................................................................................................................6

2.1.4.1. Power Supply.........................................................................................................................7

2.1.4.2. Control Inputs.........................................................................................................................8

2.1.4.3. Relay Outputs ........................................................................................................................8

2.1.5. Light-Emitting Diodes ....................................................................................................................8

2.1.6. Toggle Switches............................................................................................................................9

2.1.6.1. Switch "MODE 1" ...................................................................................................................9

2.1.6.2. Switch "MODE 2" ..................................................................................................................9

2.1.6.3. "Normally Open Contact/Normally Closed Contact" Switch.........................................................9

2.1.6.4. "Decel" Switch........................................................................................................................9

2.1.7. Notes on Technical Safety...........................................................................................................10

NO ISOLATION FROM DC POWER SUPPLY..........................................................................................................10

2.2. SCANNER TK 5....................................................................................................................................11

2.2.1. Characteristic Properties..............................................................................................................11

2.2.2. Technical Data............................................................................................................................12

2.3. CONNECTION CABLE.............................................................................................................................12

3. FUNCTION..........................................................................................................................................13

3.1. TEACH-IN............................................................................................................................................13

3.2. START...............................................................................................................................................13

3.3. SCANNING TIMES..................................................................................................................................14

3.4. STATUS INDICATION..............................................................................................................................14

3.4.1. Yellow LED.................................................................................................................................14

3.4.2. Red/Green LED...........................................................................................................................14

3.5. DEFLECTION OF WAND..........................................................................................................................14

4. INSTALLATION NOTES ......................................................................................................................15

4.1. CONTROL VOLTAGE CONNECTION............................................................................................................15

4.2. ELECTRICAL INTERFERENCE PREVENTION...................................................................................................16

Appendix A Model 5Manufacturing and Techna-Tool Part Numbers............................................................16

Contents

Page 2BK MIKRO 5-RL

Germany.

The information in this document is subject to change without notice.

Description

BK MIKRO 5-RL Page 3

1. Description

BK MIKRO 5-RL is a tool monitoring system customized for simultaneous scanning of two tools.

The complete BK MIKRO 5-RL system comprises

•a control unit,

•a sensing head (scanner),

•a connection cable.

Principle of Operation

The system will monitor the presence of two particular tools. The monitoring system will first

determine the exact position of the tools by a "teach-in" cycle. This cycle is followed by sensor-

mode, during which the sensing wand will be moved to the positions "just learned", and a comparison

takes place.

All output to the machine will be via two relay contacts, configurable as normally closed or normally

open. For machine control, the "O.K." relay, the "K.O." relay, or both may be used.

The zero position of the wand will be calculated during the "teach-in" cycle from the positions of the

two objects to be scanned. Starting from this position, any desired scanning angle can be

implemented.

Further features enabling customized system configuration include:

•Automatic detection of zero position (point of reference between scanning positions), or manually

established rest position.

•Relay contacts switch-selectable as normally open or normally closed.

•Two settings of controlled acceleration and deceleration.

•Detection of cable breaks.

System Components

Page 4BK MIKRO 5-RL

2. System Components

2.1. Control Unit

2.1.1. Characteristic Properties

The BK MIKRO 5 system control unit is housed in an insulating material housing. On its front panel,

the control unit is fitted with screw terminals to connect all machine inputs and outputs, supply

voltage, and the scanner.

Note:

The unit is available in three different models for three different supply voltages:

24 VDC, 120 VAC, 230 VAC.

Sensing Head Socket

o.k.

+–

DC 24 V Com LernStart

Scanner

k.o.

L1 N

AC 230 V

1 2

L1 N

AC 230 V L1 N

AC 120 V

Supply Voltage

(optional))

System Components

BK MIKRO 5-RL Page 5

2.1.2. Technical Data

Housing........................................Insulated Material Housing, Protection Class II

Protection Type.............................IP 20

Dimensions (W x H x D) ................45 mm x 75 mm x 107.5 mm

Case Mountings ............................DIN Rail, 35 mm, to DIN EN 50022

Power Supply Voltage....................Depending on Model:

24 VDC

120 VAC

230 VAC

Power Consumption.......................6 VA max.

Control Voltage .............................24 VDC (internal/external)

Inputs...........................................Galvanically Isolated

Switched Outputs..........................2 x 250 VAC / 30 VDC

Making/Breaking Capacity..............500 VA / 60 W (max.)

10 mA min. at 10 V

Operational Life of Relay ................5 x 107switching cycles

Connections..................................-Scanner socket to DIN 45322, 6 pins

-plug-in screw terminals for connecting

-power supply

-control inputs

-relay outputs

-scanner

Temperature Range .......................0°C to +50°C

2.1.3. Scanner Socket

For connecting scanner TK5, a 6 pin socket to DIN 45322 is fitted on the control unit front panel.

Note:

Using a different scanner may damage and/or destroy

scanner and control unit.

System Components

Page 6BK MIKRO 5-RL

2.1.4. Screw Terminals

The screw terminals have been arranged on two plug-in terminal blocks. These blocks are keyed so

that they cannot be accidentally plugged into the wrong socket. When in operation, plastic caps

cover the screws in the front. Wires to be connected are routed from the top or bottom of the unit.

Power supply, control inputs, relay outputs, and the scanner are all connected via these screw

terminals.

Note:

These plugs may only be inserted or removed when the power supply has been

disconnected.

Unmarked terminals must not be connected.

Power

Supply

e.g. AC 230 V

Control Inputs

"k.o."-

Relay

Power

Supply

DC 24 V

"o.k."-

Relay

These terminals must not be wired up !

o.k.

+–

DC 24 V Com LernStart

Scanner

k.o.

L1 N

AC 230 V

1 2

These Terminals

must not be wired up!

System Components

BK MIKRO 5-RL Page 7

2.1.4.1. Power Supply

"24 VDC" Model

•Terminal "+" 24 VDC

Supply Voltage Input 24 VDC ±20%

Input Current 0.25 A max.

•Terminal "–" 24 VDC

Reference potential of 24 VDC supply voltage.

"120 VAC" and "230 VAC" Models

Depending on the specific model, the unit will be supplied preconfigured for "120 VAC" or

"230 VAC". The relevant version will be marked on the unit type plate next to the supply connections

on the front panel.

•Terminals "L1" and “N”

Supply Voltage Input, depending on model:

120 VAC (Imax = 0.05 A) or

230 VAC (Imax = 0.025 A)

•Terminal "+" 24 VDC

Control voltage output for controlling inputs "Start" and "Learn,” 24 VDC (16 V ... 32 V) unregulated.

The control voltage meets the requirements for an extra low function potential with safe

disconnection.

Output Current 0.1 A max.

If an external control voltage is applied, this terminal is not connected.

•Terminal "–" 24 VDC

When using the internal control voltage, this terminal must be connected to the control inputs

terminal "Com".

If an external control voltage is applied, this terminal is not connected.

Note:

Alternatively, "120 VAC" and "230 VAC" models may also be supplied with 24 VDC. In this case,

terminals "L1" and "N" must not be connected. Terminals "+24 V" and "–24 V" are to be connected

as described above for "24 VDC" model.

System Components

Page 8BK MIKRO 5-RL

2.1.4.2. Control Inputs

•"Com" Terminal

Reference potential for control inputs

•"Start" Terminal

An input level of +24 VDC will trigger a "sensing" cycle.

The input current is approximately 5 mA; pulses lasting less than 6 ms will be disregarded.

•"Lern" Terminal

An input level of +24 VDC will trigger a "learning" cycle (the "teach-in").

The input current is approximately 5 mA; pulses lasting less than 6 ms will be disregarded.

The position stored during the learning cycle will remain stored even after the unit has been

switched off. Therefore, a new "teach-in" session is required only when your tool geometry

changes, or the scanner is changed.

2.1.4.3. Relay Outputs

The terminals have been designed as dry relay contacts. By switch selection, they may be configured

as either normally open or normally closed. (Note that when using the relays as normally closed, the

contacts will be open when there is no power to the unit.) The contacts have been designed for 250 V

and protected against inductive switch-off peaks of up to 19 W (2 ms).

Maximum switching power is 500 VA.

Maximum switching current may not exceed 2 A.

•"K.O." Relay Terminals

These two terminals are used to indicate a fault message (K.O.).

•"O.K." Relay Terminals

These two terminals are used to indicate a good cycle (O.K.).

2.1.5. Light-Emitting Diodes

Three light-emitting diodes on the front panel inform users about the current status of their BK MIKRO

5-RL monitoring system:

•Power Supply / Status

yellow LED to indicate supply voltage or status

•"K.O." Relay

red LED to indicate fault message

•"O.K." Relay

green LED to indicate no fault message

o.k.k.o.

L1 N

AC 230 V

System Components

BK MIKRO 5-RL Page 9

2.1.6. Toggle Switches

Using the four toggle switches arranged next to each other on the control unit front panel, the following

functions may be set.

Note -Setup on Delivery:

All switches are toggled downwards.

2.1.6.1. Switch "MODE 1"

The “MODE 1” switch determines how the home position is located. With the switch in the “off” or

“down” position, the unit will automatically set the home position as being halfway between the two

tool positions. If the switch is in the “on” or “up” position, the unit will use the position that the wand

is in when the learn cycle is initiated as its home position.

2.1.6.2. Switch "MODE 2"

The switch “MODE 2” has been reserved for future new features, and does not have any function at

this time.

2.1.6.3. "Normally Open Contact/Normally Closed Contact" Switch

The "Normally Open Contact/Normally Closed Contact" switch determines the mode of operation for

the two output relays.

2.1.6.4. "Decel" Switch

The "Decel" switch determines whether the scanner will slow down while in its scanning range.

Note:

For normal tool detection applications, this switch should be in the “Normal Decel” position, as the

normal deceleration of the unit is designed to protect the unit from wear and tear.

Cancel Decel

Normal Decel

Relay as

Normally Open Contact

Relay as

Normally Closed Contact

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