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参数资料
| 型号： | H-38-11 |
| 厂商： | Bourns Inc. |
| 文件页数： | 17/73页 |
| 文件大小： | 0K |
| 描述： | HDWR NUT MOUNTING FOR ECW ENCODR |
| 产品变化通告： | H-38-11 Hardware Change 26/Jul/2010 |
| 标准包装： | 1,000 |
| 产品目录页面： | 2575 (CN2011-ZH PDF) |
| 配用： | ECW1DB24BC0024-ND - ENCODER DIGITAL CONT 24 CPR ECW1JB24BC0024-ND - ENCODER DIGITAL CONT 24 CPR |
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Encoders
Types of Output Signals
There are two basic types of encoder output signals:
incremental and absolute. The incremental signal
consists of two phase-shifted, square-wave signals.
The phase shift is required for recognition of the
direction of rotation. The absolute signal, also
known as Gray Code, consists of discreet coded
binary values and may be from 4 to 16 bits wide. In
application, absolute encoders are required if a
particular setting must be recognized and available
after a power down of the system. All other
applications can use an incremental encoder.
Speed of Rotation
Contacting encoders have a
higher sensitivity to speed of
rotation or revolutions per
minute (RPM). On the other
hand, non-contacting encoders
can be rotated at high speeds. Most
contacting encoders begin to skip counts when the
shaft is rotated in excess of 100 RPM, while non-
contacting encoders ?tted with ball bearings can be
Switching Capability
Encoders are frequently used in switching
applications where each discreet binary
number in the output signal is
recognized as a speci?c instruction
or setting for the digital system. In
such cases, the system must
recognize the position of the encoder
after power down of the system. For those
applications, encoders such as Bourns? Model EA
Absolute Contacting Encoder (ACE?) are the
perfect solution. Incremental contacting encoders
can also be used in such applications. However, the
designer must make additional software and
hardware provisions for retaining the encoder
position in a non-volatile memory.
Another frequently used option available in many
encoder models is the momentary push switch. This
type of switch is typically used to drive menu
selection in a digital display. Bourns offers the model
EP and PEC series encoders with momentary push
switch options to suit your application.
rotated at speeds up to 3000 RPM.
Additional information on performance
16
Rotational Life
Contacting encoders have a limited rotational life
due to wear on mechanical contact components used
to create the signal output. In general, contacting
encoders have a rotational life below 100,000 cycles.
On the other hand, non-contacting encoders can
endure rotational life in excess of 1,000,000 cycles.
Non-contacting encoders are theoretically limited by
the wear in bearing surface of the
bushing or ball bearings holding the
shaft in place. Typical cycle life
expectancy is 10 million without
ball bearings and 200 million
with ball bearings.
characteristics and applications is contained in the
“Application Notes” section of this guide.
相关PDF资料 |
PDF描述 |
|---|---|
| H-90 | ADJUSTMENT TOOL |
| HB-60-2 | CORD PATCH BANANA PLUG 60" RED |
| HD33A1EN | HEADLIGHT 3 LED W/3AAA |
| HD5L33AE | HEADLIGHT 5 LED W/3AAA |
| HDL33A2E | HEADLIGHT 6 LED W/3AAA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| H-381-14 | 制造商:ETC MOLEX-INACTIVE 功能描述:Cross Referenced to MOLEX - Part: MOL19193-0330 |
| H-381-38 | 制造商:ETC MOLEX-INACTIVE 功能描述:Cross Referenced to MOLEX - Part: MOL19193-0331 制造商:Molex 功能描述:Ring Tongue Terminal (1/0)AWG 48.77mm 21.34mm Electro-Tin Bag |
| H-38-14 | 功能描述:电位计工具及硬件 H-038 HARDWARE RoHS:否 制造商:Vishay/Spectrol 产品:Adapter Kit |
| H-38-15 | 功能描述:电位计工具及硬件 HARDWARE - NUT RoHS:否 制造商:Vishay/Spectrol 产品:Adapter Kit |
| H-381-56 | 制造商:ETC MOLEX-INACTIVE 功能描述:Cross Referenced to MOLEX - Part: MOL19193-0333 |
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