|
Encoder Home
Product Literature/Videos
Encoder White Papers
Admotec OEM Components
Mounting Styles
Optical vs. Magnetic
Encoders vs. Resolvers
Update Older Models
Special Applications
Encoder Glossary
Encoder FAQ's
Encoder Competitive Cross Reference
Need an Encoder Fast?
Help Me Choose an Encoder
BC42-BC46-BC66 Brushless Tachometer Upgrade
CONTACT US
E-Mail:
Customer Help Desk
Phone:
(216) 642-4234
Fax:
(216) 642-9743
E-Mail Your Order:
Encoder Order Services
|
Optical vs. Magnetic Encoders
| Why are Avtron Optical Encoders more durable than competitor's models?
|
- Avtron's
optical encoders feature
Wide-Gap Technology. See white paper below.
- Avtron's
encoders
feature heavier duty bearings and seals for longer life.
- Avtron's encoders
have high-reliability outputs which can withstand short circuits and
mis-wiring.
|
White Paper:
 *
Air Gap Enlargements Improve Encoder Reliability |
| Why are Magnetic Encoders heavier duty than Optical Encoders?
|
Quite simply:
optical encoders are vulnerable
to three kinds of damage
-
The
optical disk
may
shatter during vibration or impact.
- The bearings fail due to stresses.
- Oil, dirt, or water get inside the
encoder due to
seal failure.
Most styles of
encoders come sealed from the
factory. Over time temperature cycling causes pressure changes
and seals fail, which creates a path to the inside of the encoder.
Often, the cause of the problem is simply moist air which enters the encoder
and then condenses, rains, or freezes inside the encoder. |
|
White Paper:
*
Lowest Cost Magnetic Encoders Solve Encoder Problems for Motor
Manufacturers |
| Why do
contaminants
(dirt, oil, water…)
cause
optical encoder
failure, and not
magnetic encoder failure? |
|
Optical encoders need to see tiny
lines on a disk accurately; they make
optical errors when there is any type of
contamination on the disk.
Magnetic encoders do not make errors due to contamination. Avtron
optical encoders are designed to reduce the causes of optical
encoder failure, they feature
Wide-Gap technology to eliminate
sensor crashes. Avtron encoders use only shatterproof
optical disks.
They use superior seals to keep
contamination out and withstand
a greater range of temperatures than the competition. |
| Select an
Avtron
Heavy Mill Duty or
Severe Duty Magnetic Encoder for severe environment
conditions. |
| Avtron
magnetic encoders withstand
dust, dirt, oil, water, and heavy temperature cycling while
providing the longest life and most reliable feedback. Magnetic
technology enables the magnetoresistive sensor to “see” even when conditions inside
the
encoder look like a rainstorm of oil or water! Avtron
modular
magnetic encoders even eliminate the bearings to increase
reliability even further. |
| When is an optical encoder superior to a magnetic encoder?
|
| Generally,
optical encoders can produce more
pulses per
revolution; for
PPR above 2048, optical
encoders may be the only choice. In the past, optical encoders were more accurate than some
magnetic encoders, even at the same PPR. However, Avtron magnetic encoders are as accurate as most optical
encoders.
|
|
