Lika Electronic was founded in 1982 in Schio, Italy

Lika Electronic was founded in 1982 in Schio, Italy.

First business was the manufacturing of absolute encoders, followed by the incremental encoders for the European market.

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Today the production includes also magnetic measurement systems,

displays &positioning units

for the Automation Industry.

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Together with standard industrial applications,

Lika provides specific solutions tailored on customers’

requirements for high-tech markets

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• ROTAPULS Optical incremental encoders

• ROTACOD Optical absolute encoders

• ROTAMAG Magnetic incremental and absolute encoders

Range of production

• POSICONTROL Displays and Position controllers

• DRIVECOD Positioning Units

• LINEPULS Incremental magnetic measurement system

• LINECOD Absolute magnetic measurement system

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• All Lika products are manufactured in Italy and sold after in-factory tryout.

• Lika is an ISO 9001: 2001 certified Company

• All products are compliant to the following specifications/certifications:

CE marking (EN 50081-1, EN 50082-2) CSA/UL marking

• Specific products are compliant to: ATEX (Explosion proof) Q+ vendor for OTIS (United Technologies Group)

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หลั�กการทำ�างานแลัะวิ�ธี�การเลั�อกใช้� Incremental

Encoder

Incremental Encoders

ROTAPULS Incremental encoders

Incremental Measuring Systems

Operation

ROTAPULS Incremental encoders

Working principle• It is based on a grated design disc, in other words a

transparent disc of glass where a radial grating of lines and gaps forming an incremental track is printed.

• The disc is penetrated by a light beam generated by a light source, partially obscurated by a scanning reticle with four additional grated fields.

• These four fields are also penetrated by the light beam. During the disc movement they produce four phase-shifted beams. Each beam is phase shifted of half –disc line from the other.

ROTAPULS Incremental encoders

Working principle

• The modulation index of each light beam is sensed by photo-elements placed on the opposite side of the disc.

• The photo-elements transform the entering light signals in four sinusoidal current signals.

PHOTO-ELECTRONIC READING

DIGITIZINGPOWER OUT

POWER SUPPLY

+3,3V

+Vdc

• The analogue signals are digitized and multiplied by one interpolation circuit

• Furtherly they are sent to amplification circuits to be conveniently powered in output

ROTAPULS Incremental encoders

ROTAPULS Incremental encoders

• AB channels = Bidirectional (speed and rotation sense detection)

• AB0 = Bidirectional + Zero• /A, /B, /0 = Complementary

signals (inverted)

Output signals

ROTAPULS Incremental encoders

• 1Vpp output circuit• Sin/cos analogue signals for

external interpolation

Output signals

Methods for signals transmission

• “Normal” = 1 signal each channel (AB0)

• connection to Push-Pull, NPN, PNP devices

• Needs external filters for noise reduction

• “Complementary” = additional inverted signal for each channel (A B 0 + /A /B /0)

• safe transmission even with long cables and noisy environment

ROTAPULS Incremental encoders

Manipulation of signals

Quadrature of signals (x4)• Reading all signal fronts

(A+B), resolution increases 4 times

• ex. 500 PPR = 2000 fronts

Interpolation• SIN/COS output signals can be

interpolated • Interpolation “divides” a

sine/cosine signal into many pulses

• ex. 1024 sin/cos x10 = 10240 fronts

ROTAPULS Incremental encoders

เทำคน�คแลัะวิ�ธี�การเลั�อก Incremental Encoder

1) Pulse Per Revolution

ROTAPULS Incremental encoders

Scaling for Counters

ROTAPULS Incremental encoders

ROTAPULS Incremental encoders

500PPR

Circumference = 30 cm

Wants to show centimeter

Pulses Input x Scale Factor = Display

500 X SF = 30

Scaling• Example

30

500= 0.06

With Scale SF = 0.06

SF =

ROTAPULS Incremental encoders

2) Supply and Output Circuit NPN (10-30 Vdc)

PNP (10-30 Vdc)

Push-Pull (10-30 Vdc) > NPN/PNP

Line Driver (5 Vdc)

Push Pull / Line Driver(5-30 Vdc) >NPN/PNP

3) Output Signal A , /A B , /B Z , /Z

ROTAPULS Incremental encoders

Mono/Unidirectional > 1 Channel Output > A

Quadrature/Bidirectional > 2 (Dual) Channel Output > A,B

Bidirectional with Index > 3 Channel Output > A,B,O

ROTAPULS Incremental encoders

Line Driver > 6 Channel Output > A,/A,B,/B,Z,/Z

ROTAPULS Incremental encoders

4) Shaft , Bore Diameter

Flexible Coupling

ROTAPULS Incremental encoders

5) Dimension Body Size ( Europe= mm, U.S. = Inch )

ROTAPULS Incremental encoders

6) Connection Connector (7-pin,10-pin, 12-pin etc. ) Cable (1,3,5,10 meter etc.)

ROTAPULS Incremental encoders

Types of assembly

With fixing bell With anti-rotation pin

With fixing spring With flexible coupling

ROTAPULS Incremental encoders

I40 - I41Small encoder for industrial

applications

ROTAPULS Incremental encoders

• I40 M20 screw fixing

• I41 3 screws fixing

• housing Ø 40.5 mm

• resolution up to 3600 PPR

• cable output

ROTAPULS Incremental encoders

• I41 preferential encoder

•packaging & food machines

• woodworking machinery

I40 - I41 Small encoder for industrial

applications

ROTAPULS Incremental encoders

• housing Ø 58 mm

• shaft Ø 6, 8, 9.52, 10, 12 mm

• up to 10000 PPR

• NPN, PP, LD, Universal circuit

• cable and connector output

I58 - I58S International standard encoder

ROTAPULS Incremental encoders

• preferential encoder

• international standard size

• motors and lift motors

I58 - I58S International standard encoder

I58 V – sin/cos encoder

ROTAPULS Incremental encoders

• dimensions like I58 (or I58S)

• 1Vpp standard output (I58 A 11 µApp)

• typ. 1024 or 2048 PPR

ROTAPULS Incremental encoders

• standard output circuit for NCs and drives

• motor feedback (AC, DC, Lift motors)

• tool machines

I58 V – sin/cos encoder

IT65 - I65 encoder for heavy duty applications

ROTAPULS Incremental encoders

• strong die-cast housing Ø65 mm

• 100 N shaft load

• standard IP65 (IP66 optional)

• NPN, PP, LD, Universal circuit

• up to 10000 PPR

ROTAPULS Incremental encoders

• standard US size

• preferential encoder

• woodworking machinery

• stone & marble machines

IT65 - I65 encoder for heavy duty applications

Through-hollow shaft encoders

C59 C60 C58 C58R C58A

ROTAPULS Incremental encoders

• up to 1024 PPR

• shafts 14 or 15 mm

• BR1-xx sleeve for lower shafts

• up to 2048 PPR

• “R” has collar on the back side

• “A” has collar on the front side

ROTAPULS Incremental encoders

• motors with integrated brake

• spindles

• motor feedback

Through-hollow shaft encoders

C59 C60 C58 C58R C58A

ROTAPULS Incremental encoders

• Based on I58 standard

• up to 10000 PPR

• hollow shafts 14 or 15 mm

• BR1-xx reducing sleeve

• 3 mounting types (xx58, xx59, xx60)

CK59 CK60 CK58standard blind-hollow shaft

encoder

CK59 CK60 CK58standard blind-hollow shaft

encoder

ROTAPULS Incremental encoders

• Standard hollow shaft encoder

• more robust than through hollow shaft (C58,….)

• direct coupling on draw wire support (SF-I-5000)

• cable and connector output

• preferential encoder

ROTAPULS Incremental encoders

C81 feedback encoder

• housing Ø 80x36 mm

• shaft Ø 18 to 44 mm

• up to 4096 PPR

• max. speed 3000 rpm

• max. operating temperature range: -40°C÷+100°C (-40°F÷+212°F)

• IP65 max.

ROTAPULS Incremental encoders

• big hollow shaft

• stainless steel flange

• internal parts in stainless steel

• for big sized motors, gear motors

• lift motors

C81 feedback encoder

ROTAPULS Incremental encoders

CB59 Motor feedback encoder

• Sin/cos + absolute position

• 2048 PPR sin/cos

• 1 sin/cos per turn (absolute)

• blind hollow shaft Ø 14 or 15 mm

• for brushless or gearless motors

• 2048 sin/cos for speed regulation

• Z track for rotor position at start-up

• Replaces absolute encoders, resolvers, hall effects

ROTAPULS Incremental encoders

CB59 Motor feedback encoder

ROTAPULS Incremental encoders

CK61 feedback encoder

• housing Ø 58 mm

• blind hollow shaft Ø 10 or 12 mm

• up to 10000 PPR

• max. output frequency: 300 kHz

ROTAPULS Incremental encoders

• internal coupling

• shaft is fixed from backside

• easy mounting

CK61 feedback encoder