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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.
www.lika.biz
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Today the production includes also magnetic measurement systems,
displays &positioning units
for the Automation Industry.
www.lika.biz
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Together with standard industrial applications,
Lika provides specific solutions tailored on customers’
requirements for high-tech markets
www.lika.biz
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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
www.lika.biz
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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)
www.lika.biz
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หลั�กการทำ�างานแลัะวิ�ธี�การเลั�อกใช้� Incremental
Encoder
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Incremental Encoders
ROTAPULS Incremental encoders
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Incremental Measuring Systems
Operation
ROTAPULS Incremental encoders
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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
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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
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ROTAPULS Incremental encoders
• AB channels = Bidirectional (speed and rotation sense detection)
• AB0 = Bidirectional + Zero• /A, /B, /0 = Complementary
signals (inverted)
Output signals
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ROTAPULS Incremental encoders
• 1Vpp output circuit• Sin/cos analogue signals for
external interpolation
Output signals
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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
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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
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เทำคน�คแลัะวิ�ธี�การเลั�อก Incremental Encoder
1) Pulse Per Revolution
ROTAPULS Incremental encoders
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Scaling for Counters
ROTAPULS Incremental encoders
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ROTAPULS Incremental encoders
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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
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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
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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
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Line Driver > 6 Channel Output > A,/A,B,/B,Z,/Z
ROTAPULS Incremental encoders
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4) Shaft , Bore Diameter
Flexible Coupling
ROTAPULS Incremental encoders
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5) Dimension Body Size ( Europe= mm, U.S. = Inch )
ROTAPULS Incremental encoders
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6) Connection Connector (7-pin,10-pin, 12-pin etc. ) Cable (1,3,5,10 meter etc.)
ROTAPULS Incremental encoders
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Types of assembly
With fixing bell With anti-rotation pin
With fixing spring With flexible coupling
ROTAPULS Incremental encoders
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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
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ROTAPULS Incremental encoders
• I41 preferential encoder
•packaging & food machines
• woodworking machinery
I40 - I41 Small encoder for industrial
applications
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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
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ROTAPULS Incremental encoders
• preferential encoder
• international standard size
• motors and lift motors
I58 - I58S International standard encoder
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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
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ROTAPULS Incremental encoders
• standard output circuit for NCs and drives
• motor feedback (AC, DC, Lift motors)
• tool machines
I58 V – sin/cos encoder
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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
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ROTAPULS Incremental encoders
• standard US size
• preferential encoder
• woodworking machinery
• stone & marble machines
IT65 - I65 encoder for heavy duty applications
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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
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ROTAPULS Incremental encoders
• motors with integrated brake
• spindles
• motor feedback
Through-hollow shaft encoders
C59 C60 C58 C58R C58A
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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
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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
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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.
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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
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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
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• 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
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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
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ROTAPULS Incremental encoders
• internal coupling
• shaft is fixed from backside
• easy mounting
CK61 feedback encoder