Upload
noel-foster
View
217
Download
0
Embed Size (px)
Citation preview
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
Today the production includes also magnetic measurement systems,
displays &positioning units
for the Automation Industry.
www.lika.biz
Together with standard industrial applications,
Lika provides specific solutions tailored on customers’
requirements for high-tech markets
www.lika.biz
• 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
• 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
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