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| 型号： | H-38-11 |
| 厂商： | Bourns Inc. |
| 文件页数： | 38/73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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Application Notes
Moment of Inertia
To determine the rotational inertia for the EN series
encoder, use the appropriate formula from the table.
Shaft Torque
Torque is an important parameter sometimes
overlooked in the initial design phase. In panel
control (manual adjustment) applications, shaft
Encoder
Rotational Inertia
torque must be suf?cient to provide the proper “feel”
Style
ENS
ENT
Description
Ball bearing
1/4” dia. shaft
Ball bearing
(g-cm2)
0.64 + 0.0102 x
shaft length modi?er
0.15 + 0.0006 x
or to insure setting stability. Conversely, in some
position feedback and motor driven uses, it is
important that torque be minimized.
1/8” dia. shaft
shaft length modi?er
Standard
Optional
Optional
ENW
Ball bearing
1/8” dia. shaft
0.15 + 0.0006 x
shaft length modi?er
Models
ENS, ENT,
Torque
0.05 oz.-in. typ.
Low Torque
0.01 oz.-in. min .
Low Torque
(consult factory)
servo (?ange)
ENW
ENA
mount
Sleeve bearing
0.58 + 0.0102 x
ENA, ENC
0.75 oz.-in. typ.
0.10 oz.-in. min .
10.0 oz.-in. max .
ENC
1/4” dia. shaft
Sleeve bearing
1/8” dia. shaft
shaft length modi?er
0.15 + 0.0006 x
shaft length modi?er
Torque specifications available from Bourns
Shaft Interfacing
Calculate the shaft length modi?er as follows:
Express the desired shaft length (from the mounting
surface - FMS) in thirty-seconds of an inch, and then
subtract 28 from the numerator. The result is the
shaft length modi?ers. For example:
A shaft length (FMS) of 5/8? is equivalent to 20/32.
The shaft length modifier is then equal to 20 minus
28, or -8.
A number of different techniques have been
developed for transmitting linear or rotary motion
to an encoder. When selecting the appropriate
method, typical considerations are space, cost,
operating speed, side and end loading, accuracy and
cycle life. Choosing the optimum solution may
require some speci?cation compromises. For
example, a shaft coupling device chosen to minimize
side loading for long cycle life may not provide the
best system accuracy.
Shafts
The EN Series encoder uses a precision-machined
metal shaft. The advantages of this feature are: 1)
dimensional accuracy, 2) shaft strength, and 3)
design ?exibility. In addition to standard options,
shafts can be easily customized to application speci?c
requirements including special end features. It is also
possible to orient an end feature (such as a ?atted
shaft) to correspond with the optional index channel
output. When specifying a shaft length, measure the
distance from the encoder mounting surface to the
desired shaft end. Do not specify from the point
where the shaft exits the bushing.
Shaft couplers are commercially available ?exible
couplers and can be the simplest means of directly
interfacing the encoder shaft with another shaft in
the system. Two important performance
considerations for couplers are:
1) the accuracy with which rotary motion is
transmitted to the encoder, (i.e., backlash of the
coupler) and
2) the ability to insulate the encoder from side and
end loading. Some commonly used ?exible
couplers are shown below.
37
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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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