How to Select Incremental Rotary Encoders                Image credit:  Dunkermoteren USA | Dynapar Corp. | Renishaw   Incremental rotary encoders are electro-mechanical devices that use pulses to track motion.   Understanding Incremental Rotary Encoders Rotary encoders convert the angular position of a shaft or axle to an analog or digital code. Whereas absolute encoders can be used to track both motion...
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Q & A on Incremental Rotary Encoders

We asked our users for their input on Incremental Rotary Encoders. Here are the results of 55 users familiar with Incremental Rotary Encoders.

Who Took Our Poll? | Design Trends | Applications and Use | Features | Buying Advice

Who Took Our Poll?Top

Design TrendsTop

Q:
What new technologies are influencing incremental rotary encoder design?
9 answers
Answers:
On the fly and wireless rotary torque encoders and transducers, Hazardous environment equipment.
~Stephen G, Research & Development, Houston, TX
New internal sensors, quartz rotary crystal wheel.
~Emilio K, Research & Development, Buenos Aires, Argentina
Speed and interference resilience.
~Roberto P, Technical Support, Ras Al Khaimah, Australia
Rapid prototyping of aircraft control panels.
~Arthur Howell, Design Engineer, Seattle, WA
High speed motion control app.
~Enrique L, Technical Support, Santiago, Chile
Magnetic sensing
~Princeton Junction, NJ
Micro-fabrication.
~David G, Faculty/Staff, Philadelphia, PA
Optical devices
~Nicolae P, Faculty/Staff, Petrosani, Romania
Hall effect
~Yuvaraj J, Design Engineer, Singapore, Singapore

Q:
From your perspective, which companies are creating the most innovative incremental rotary encoders?
11 answers
Answers:
Turck, Pepperl & Fuchs, Futek
~Stephen G, Research & Development, Houston, TX
Bei, Avago, Heidenhainn
~Emilio K, Research & Development, Buenos Aires, Argentina
Sick and Heidenhain
~Roberto P, Technical Support, Ras Al Khaimah, Australia
Lika/ ormon/ ....
~Weiheng Zhen, Engineer, Zhongshan, China
IFM, Danaher,
~Engineering, Design, Bangalore, India
Grayhill, EOA
~Arthur Howell, Design Engineer, Seattle, WA
Accucoder.
~Gary M., Maintenance Manager, Ft. Myers, FL
Heidenhain
~Princeton Junction, NJ
Dynapar
~Enrique L, Technical Support, Santiago, Chile
Baumer
~Yuvaraj J, Design Engineer, Singapore, Singapore
~David G, Faculty/Staff, Philadelphia, PA

Applications and UseTop

Q:
What are some of the applications you have used incremental rotary encoders for?
16 answers
Answers:
Lathe compound slide angle readout
~David G, Faculty/Staff, Philadelphia, PA
Servomotor and spindle motor feedback
~Roberto P, Technical Support, Ras Al Khaimah, Australia
Oilfield, Engine RPM, Swivel RPM, Top Drive RPM, Intrinsically safe, and Class1 Div 2 location placement.
~Stephen G, Research & Development, Houston, TX
I have used them for timing the cut of moving tubing, RPM measurement, and length read out.
~Gary M., Maintenance Manager, Ft. Myers, FL
Measure speed /measure length/ measure angle
~Weiheng Zhen, Engineer, Zhongshan, China
Displacement and velocity measurement
~Nicolae P, Faculty/Staff, Petrosani, Romania
Instead of using encoders, I study and design encoders.
~Engineering, Design, KITAKOMA-GUN, Japan
For motion control applications.
~Enrique L, Technical Support, Santiago, Chile
Bag machine motion control
~Emilio K, Research & Development, Buenos Aires, Argentina
Prototype avionic panels.
~Arthur Howell, Design Engineer, Seattle, WA
Thermal printer mechanism.
~Engineering, Design, Glendale, CA
General Motion Control
~Princeton Junction, NJ
Medical applications
~Engineering, Design, Bangalore, India
To find cam angle
~Yuvaraj J, Design Engineer, Singapore, Singapore
CNC Machine.
~Engineering, Other, Bekasi, Indonesia
Robotics
~Engineering, Design, Leuven, Belgium

Q:
Please share with us any “non-standard” applications that incremental rotary encoders have been used for.
2 answers
Answers:
Speed and position for running belt.
~Emilio K, Research & Development, Buenos Aires, Argentina
As a pulse generator.
~Yuvaraj J, Design Engineer, Singapore, Singapore

Q:
Do you know of any disastrous mistakes that occurred due to the incorrect usage of incremental rotary encoders?
2 answers
Answers:
The coupling is not tightened and causes accidents.
~Yuvaraj J, Design Engineer, Singapore, Singapore
Yes. The motor simply won't function.
~Roberto P, Technical Support, Ras Al Khaimah, Australia

FeaturesTop

Q:
What would your design or feature "wish list" be for this product?
7 answers
Answers:
Micro design, wireless, computer interface, Intrinsically Safe, greater pickup distance.
~Stephen G, Research & Development, Houston, TX
Compatible with standalone I/O circuits
~Arthur Howell, Design Engineer, Seattle, WA
Field change of parameters
~Yuvaraj J, Design Engineer, Singapore, Singapore
Small size, low cost. I would really like to see a replacement for the low cost absolute encoder that Avago recently abandoned. There is no competition for it and I was forced to use an incremental encoder instead.
~David G, Faculty/Staff, Philadelphia, PA
I would like to see them come down in price.
~Gary M., Maintenance Manager, Ft. Myers, FL
Isolated interface
~Emilio K, Research & Development, Buenos Aires, Argentina
Just keep it simple.
~Roberto P, Technical Support, Ras Al Khaimah, Australia

Q:
Is there any advice you want to share with users to help them avoid common errors in selection or usage of incremental rotary encoders?
4 answers
Answers:
Company reps are a good source of info if they can visit your location and bring samples of the product in order to communicate better with them about your specific design needs.
~Stephen G, Research & Development, Houston, TX
Read the datasheet carefully.
~Roberto P, Technical Support, Ras Al Khaimah, Australia
To check for the accessories homing application.
~Yuvaraj J, Design Engineer, Singapore, Singapore
BEI Industries
~Emilio K, Research & Development, Buenos Aires, Argentina

Buying AdviceTop

Q:
Do you have any advice for people relative to buying or using incremental rotary encoders?
4 answers
Answers:
Go for known and reliable brands.
~Roberto P, Technical Support, Ras Al Khaimah, Australia
Service and support concerns
~Yuvaraj J, Design Engineer, Singapore, Singapore
Keep them clean.
~Gary M., Maintenance Manager, Ft. Myers, FL
Shop it and ask a lot of questions.
~Stephen G, Research & Development, Houston, TX


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