Encoders and Resolvers Series:The Benefits to Closed Loop Motion Feedback

This webinar will be available afterwards at

designworldonline.com & email

Q&A at the end of the presentation

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Before We Start

Moderator

Miles BudimirDesign World

Presenter

Allen ChaseyEastern U.S. Sales Manager, Dynapar Corp.

Allen Chasey is the Eastern U.S. Sales Manager for Dynapar Corp. and specializes in encoder

and resolver motion feedback, with a concentrated focus in the Off-Highway Vehicle industry.

Allen received his Bachelor of Science in Applied Physics from Jacksonville University, and has

worked in the electronic/automation industry for twenty years.

Your customers want…

Two more bells

Five more whistles

Infinite uptime

Negative cost

Your boss wants…

Faster installation

Fewer failures

Lower operating cost

Better throughput

You want…

Closed-loop feedback

increase throughput

decrease downtime

enhance safety

boost performance

long-term savings

Work Smarter, Not Harder

Paper Mill

Are you involved in industries like:

Mining

Logging

Aerospace

Steel manufacturing

Tire manufacturing

Dockside cranes

Oil & Gas (drilling,exploration)

Elevator

Motor OEM

“But I don’t build packaging machines.”

It ain't what you don't know that's

the problem, it's what you know

for sure that just ain't so.

-- Mark Twain

HVAC Cooling Fans: Lesson Learned!

The first engineering team to try it gained an enormous strategic advantage

Speed feedback

Position feedback

Close the loop on the

load or on the motor

Rotary Feedback 101

Tough--no onboard electronics

Analog

High resolution

Resolver Applications:

• Aerospace

• Oil & Gas (down-hole drilling)

• Formula One Racing (Kinetic Energy Recovery System)

Resolvers

Did We Mention TOUGH?

Encoders

Speed or position

Flexible

Optical versus magnetic

Incremental versus absolute

High resolution

Digital

Did We Mention TOUGH?

When should you close the loop on the motor rather

than the load?

a) Controlling speed, not displacement

b) When there’s excessive backlash

or “slop” in your system

c) When tight speed tolerance

(.01%) isn’t required

Poll question #1

#1 Reduce downtime!!!

Another diagnostic for drives and controllers

The canary in the coal mine

Detect problems faster

Encoders alert drives

Drives and controllers alert HMI

Shop floor to top floor

Planned maintenance vs. unplanned faults

…and Downtime is Not.

Logging: if a branch

catches a wire, how do

you find the problem?

Connected, closed-loop

feedback

On The Bus

#2 Improve speed control

It’s not about going fast

The slower you go, the more resolution you need

If you’re controlling volume, you need to control speed

Underground mining

vehicles

Better starting and

stopping

Elevator cars

Fertilizer spreaders

This matters in…

Better quality product – paper,

rolling metal, rubber and tires

Better starting and stopping –

elevators, mining vehicles

Less wear

Smaller motors can

do the job

What does it get you?

When is high-resolution feedback

most important?

a) High-speed motion

b) Low speed motion

c) High-dynamic-range motion

Poll question #2

#3 Prevent Damage

Protect your system

Your product

Your personnel

Stop Unsafe Motion

Short jacking – you need to

restrict the arc of the boom

In Lift Vehicles

Potentiometers work…

…for a while

…if you don’t have EMI

…or arc welding

…and you don’t need intelligent feedback

Did We Mention TOUGH?

…are noncontact

…are CANbus compatible

…deliver real-time

diagnostics

Absolute encoders…

#4 Bridge the Performance Gap

Smart excavators with GPS do a lot…

Return-to-dig

Inches of resolution

…And cost a lot

Manual excavators deliver a bargain…

…What happens when your skilled operator is out sick?

The Great Divide

…pinpoint bucket

location

…pinpoint speed

…deliver return-to-dig

with greater accuracy

And did we

mention TOUGH?

Encoders…

#5 Make your equipment last

Entropy sucks.

lack of order or predictability; gradual decline into disorder

SOLUTION:Keep things in ORDER!

Go Closed Loop!

Your equipment wears out a little more every day…

Feedback Can

Help!

Hydraulics

Hard stops and starts = shock

and vibration

Damage seals

Loosen connections

Compromise welds and

fasteners

Hi-Res Feedback

Easy does i

Fixed-speed pumps with valves

to control flow.

• Pressure jump creates heat

• Any water vaporizes

• Things go boom

Mining--Variable Speed Flow

(and don’t forget Oil & Gas mud pumps!)

Slows Motor BEFORE Valve Closes.

No dead-heading

No explosions

Less wear, longer lifetime

Closed-Loop Feedback…

Key Feedback Trends

Health monitoring

Dynamically reprogrammable

Bus Communications

Non-Contact Sensing

Sensors separated from rotating equipment

Easier to install

More forgiving form factor

Fewer wear points

Never lose track of

your location

Unless you want to

reset home – once or many

Bus connectivity

Higher accuracy

Absolute Feedback

Stronger bearings

Shaftless

Potted electronics

Chip-based array sensors

Did we mention TOUGH?

bearingless shaftless

potted electronics

Semiconductor fabrication – more for less

Cost of operations versus cost of acquisition

Modest outlay, big boost

And Budget-Friendly Performance?

Closed-loop feedback can give

your product:

More bells

More whistles

Faster throughput

Better quality

Less downtime

Better cost/performance ratio

Conclusion (or back to your to-do list)

Explore What Closed-Loop Feedback

Can Do For You

Questions?

Design WorldMiles Budimir

mbudimir@wtwhmedia.comPhone: 440.234.4531Twitter: @DW_Motion

DynaparAllen ChaseyAllen.chasey@dynapar.com Phone: 1.678.817.4945Twitter: @encoders

Thank You

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