2. 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.

3. Today the production includes also magnetic measurement systems,
displays &
positioning units
for the Automation Industry.

4. Together with standard industrial applications,
Lika provides specific solutions tailored on customers’
requirements for high-tech markets

5. Range of production ROTAPULS Optical incremental encoders
ROTACOD Optical absolute encoders
ROTAMAG Magnetic incremental and absolute encoders
LINEPULS Incremental magnetic measurement system
LINECOD Absolute magnetic measurement system
POSICONTROL Displays and Position controllers
DRIVECOD Positioning Units

6. 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 , EN )
CSA/UL marking
Specific products are compliant to:
ATEX (Explosion proof)
Q+ vendor for OTIS (United Technologies Group)

7. หลักการทำงานและวิธีการเลือกใช้ Incremental Encoder

8. ROTAPULS Incremental encoders

9. Incremental Measuring Systems
ROTAPULS Incremental encoders
Operation
Incremental Measuring Systems

10. 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.

11. 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.
The analogue signals are digitized and multiplied by one interpolation circuit
Furtherly they are sent to amplification circuits to be conveniently powered in output
PHOTO-ELECTRONIC
READING
DIGITIZING
POWER
OUT
POWER SUPPLY
+3,3V
+Vdc

12. ROTAPULS Incremental encoders
Output signals
AB channels = Bidirectional (speed and rotation sense detection)
AB0 = Bidirectional + Zero
/A, /B, /0 = Complementary signals (inverted)

13. ROTAPULS Incremental encoders
Output signals
1Vpp output circuit
Sin/cos analogue signals for external interpolation

14. Methods for signals transmission
ROTAPULS Incremental encoders
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

15. Manipulation of signals
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 sin/cos x10 = fronts

16. เทคนิคและวิธีการเลือก Incremental Encoder
ROTAPULS Incremental encoders
เทคนิคและวิธีการเลือก Incremental Encoder
1) Pulse Per Revolution

17. ROTAPULS Incremental encoders
Scaling for Counters

18. ROTAPULS Incremental encoders

19. Pulses Input x Scale Factor = Display
ROTAPULS Incremental encoders
Scaling
Example
Wants to show centimeter
Pulses Input x Scale Factor = Display
X SF =
500PPR
Circumference = 30 cm 30
500 =
0.06
SF =
With Scale SF = 0.06

20. 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

21. 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

22. ROTAPULS Incremental encoders
Line Driver > 6 Channel Output > A,/A,B,/B,Z,/Z

23. ROTAPULS Incremental encoders
4) Shaft , Bore Diameter
Flexible Coupling

24. ROTAPULS Incremental encoders
5) Dimension
Body Size ( Europe= mm, U.S. = Inch )

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

28. ROTAPULS Incremental encoders
Types of assembly
With fixing bell
With anti-rotation pin
With fixing spring
With flexible coupling

29. Small encoder for industrial applications
ROTAPULS Incremental encoders
I40 - I41
Small encoder for industrial applications
I40 M20 screw fixing
I41 3 screws fixing
housing Ø 40.5 mm
resolution up to 3600 PPR
cable output

30. Small encoder for industrial applications
ROTAPULS Incremental encoders
I40 - I41
Small encoder for industrial applications
I41 preferential encoder
packaging & food machines
woodworking machinery

31. International standard encoder
ROTAPULS Incremental encoders
I58 - I58S
International standard encoder
housing Ø 58 mm
shaft Ø 6, 8, 9.52, 10, 12 mm
up to PPR
NPN, PP, LD, Universal circuit
cable and connector output

32. International standard encoder
ROTAPULS Incremental encoders
I58 - I58S
International standard encoder
preferential encoder
international standard size
motors and lift motors

33. ROTAPULS Incremental encoders
I58 V – sin/cos encoder
dimensions like I58 (or I58S)
1Vpp standard output (I58 A  11 µApp)
typ or 2048 PPR

34. ROTAPULS Incremental encoders
I58 V – sin/cos encoder
standard output circuit for NCs and drives
motor feedback (AC, DC, Lift motors)
tool machines

35. encoder for heavy duty applications
ROTAPULS Incremental encoders
IT65 - I65
encoder for heavy duty applications
strong die-cast housing Ø65 mm
100 N shaft load
standard IP65 (IP66 optional)
NPN, PP, LD, Universal circuit
up to PPR

36. encoder for heavy duty applications
ROTAPULS Incremental encoders
IT65 - I65
encoder for heavy duty applications
standard US size
preferential encoder
woodworking machinery
stone & marble machines

37. Through-hollow shaft encoders
ROTAPULS Incremental encoders
Through-hollow shaft encoders
C59 C60 C C58R C58A
up to 2048 PPR
“R” has collar on the back side
“A” has collar on the front side
up to 1024 PPR
shafts 14 or 15 mm
BR1-xx sleeve for lower shafts

38. Through-hollow shaft encoders
ROTAPULS Incremental encoders
Through-hollow shaft encoders
C59 C60 C C58R C58A
motors with integrated brake
spindles
motor feedback

39. standard blind-hollow shaft encoder
ROTAPULS Incremental encoders
CK59 CK60 CK58
standard blind-hollow shaft encoder
Based on I58 standard
up to PPR
hollow shafts 14 or 15 mm
BR1-xx reducing sleeve
3 mounting types (xx58, xx59, xx60)

40. standard blind-hollow shaft encoder
ROTAPULS Incremental encoders
CK59 CK60 CK58
standard blind-hollow shaft encoder
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

41. 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: °C÷+100°C (-40°F÷+212°F)
IP65 max.

42. ROTAPULS Incremental encoders
C81 feedback encoder
big hollow shaft
stainless steel flange
internal parts in stainless steel
for big sized motors, gear motors
lift motors

43. CB59 Motor 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

44. CB59 Motor feedback encoder
ROTAPULS Incremental encoders
CB59 Motor feedback encoder
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

45. ROTAPULS Incremental encoders
CK61 feedback encoder
housing Ø 58 mm
blind hollow shaft Ø 10 or 12 mm
up to PPR
max. output frequency: 300 kHz

46. ROTAPULS Incremental encoders
CK61 feedback encoder
internal coupling
shaft is fixed from backside
easy mounting