công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
HEDS-9730 bảng dữ liệu(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
|
HEDS-9730 bảng dữ liệu(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
2 / 6 page 2 Definitions Note: Refer to Figure 2 Count (N): The number of bar and window pairs or counts per revolution (CPR) of the codewheel. Or the number of lines per inch of the codestrip (LPI) 1 shaft Rotation = 360 degrees = N cycles 1 cycle (c) = 360 electrical degree, equivalent to 1 bar and window pair. Pulse Width (P): The number of electrical degrees that an output is high during one cycle, nominally 180 °e or 1/2 a cycle. Pulse Width Error ( ΔP): The deviation in electrical degrees of the pulse width from its ideal value of 180 °e. State Width (S): The number of electrical degrees between a transition in the output of channel A and the neigh- boring transition in the output of channel B. There are 4 states per cycle, each nominally 90 °e. State Width Error ( ΔS): The deviation in electrical degrees of each state width from its ideal value of 90 °e. Phase ( φ): The number of electrical degrees between the center of the high state on channel A and the center of the high state on channel B. This value is nominally 90 °e for quadrature output. Phase Error ( Δφ): The deviation in electrical degrees of the phase from its ideal value of 90 °e. Direction of Rotation: When the codewheel rotates in the counter-clockwise direction (as viewed from the encoder end of the motor), channel A will lead channel B. If the codewheel rotates in the clockwise direction, channel B will lead channel A. Optical Radius (Rop): The distance from the codewheel’s center of rotation to the optical center (O °C) of the encoder module. Angular Misalignment Error (EA): Angular misalignment of the sensor in relation to then tangential direction. This applies for both rotary and linear motion. Mounting Position (RM): Distance from Motor Shaft center of rotation to center of Alignment Tab receiving hole. Theory of Operation A HEDS-973X is a C-shaped emitter/detector module. Coupled with a codewheel, it translates rotary motion into a two-channel digital output; coupled with a codestrip, it translates linear motion into digital outputs. As seen in Figure 1, the module contains a single Light Emitting Diode (LED) as its light source. The light is col- limated into parallel beam by means of a single lens located directly over the LED. Opposite the emitter is the integrated detector circuit. This IC consists of photo- detectors and a signal processing circuitry necessary to produce the digital waveforms. The codewheel/codestrip moves between the emitter and detector, causing the light beam to be interrupted by the pattern of spaces and bars on the codewheel/ codestrip. The photodiodes, which detect these interrup- tions, are arranged in a pattern that corresponds to the radius and count density of the codewheel/ codestrip. These photodiodes are also spaced such that a light period on one pair of detectors corresponds to a dark period on the adjacent pairs of detectors. The photodiode outputs are fed through the signal processing circuitry. Two comparators receive these signal and produce the final outputs for Channels A and B. Due to this integrated phasing technique the output of channel A is in quadra- ture with Channel B (90 degrees out of phase). Output Waveforms Figure 2. P C ROTATION ф CHANNEL A CHANNEL B S1 S4 S2 S3 |
Số phần tương tự - HEDS-9730 |
|
Mô tả tương tự - HEDS-9730 |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |