編碼器信號閃爍的原因和故障排除提示
編碼器信號閃爍或跳躍是編碼器脈沖形狀的不一致，并且經常被誤認為是抖動。編碼器抖動通常具有不一致的模式，而通過放大和縮小脈沖波可以更突出地看到閃爍，但是通常是隨機地發(fā)生。
Encoder Signal Flicker: Causes and Troubleshooting Tips
Encoder signal flicker or jump is an inconsistency in encoder pulse shape and can often be mistaken for jitter. Encoder jitter will usually have a pattern of inconsistency while flicker can be seen more prominently by zooming in and out of the pulse wave but occur somewhat randomly.
編碼器信號閃爍的最可能原因
插值通過在數(shù)據(jù)點之間插值來增加編碼器的有效分辨率。例如，該技術可用于將脈沖1800 PPR編碼器翻倍以充當3600 PPR編碼器。插值假設兩個脈沖在大小，頻率，對稱性和面對方面相同。例如，如果對稱性存在偏差，則當示波器在第一個脈沖上觸發(fā)時，跡線將跳轉。
Most Likely Causes of Encoder Signal Flicker
Interpolation increases the effective resolution of the encoder by interpolating between data points. The technique can be used to double up an 1800 PPR encoder to act as a 3600 PPR encoder, for example. Interpolation assumes that the two pulses are identical in size, frequency, symmetry, and facing. If there is a deviation in symmetry, for example, the trace will jump when the scope triggers on the first pulse.
快速故障排除提示
信號看起來是方波嗎？
它是否以特定周期閃爍或跳躍？
Quick Troubleshooting Tips
Does the signal appear to be a square wave?
Does it flicker or jump with a specific periodicity?
診斷
對于使用插值的編碼器，這是正常操作的一部分。要回答的問題是閃爍是否超出規(guī)范，應咨詢編碼器數(shù)據(jù)表以確定問題是否在操作規(guī)范范圍內。如果應用需要精確信號或檢測到痕量運動，則具有直讀真實分辨率（未內插）的編碼器可能更適合。
Diagnosis
For encoders using interpolation, this is part of normal operation. The question to answer is whether the flicker is out of spec and the encoder datasheet should be consulted to determine if the issue is within the operating specification. If the application requires precise signals or detection of trace amounts of motion, an encoder with direct-read true resolution (not interpolated) may be better suited.
聲明：原文來源于DYNAPAR編碼器官方網站，翻譯由愛澤工業(yè)，版權歸原作者所有。
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