DFRobot ホイール エンコーダ DFRobot 3PA および 4WD ローバー用 (2個パック)

DFRobot商品コード:RB-Dfr-46
メーカー #: SEN0038

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販売価格 ¥2,226

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概要

  • 電圧:+5V
  • DFRobot 3PA および AWD ローバー向けに設計されたエンコーダ
  • 車輪に回転角度を提供
  • エンコーダ、プラスチック製チューブ、紙媒介ガスケットなどを同梱

DFRobot ホイール エンコーダ DFRobot 3PA および 4WD ローバー用 (2個パック) は、DFRobot 製 3PA および AWD ローバーのために設計。 お使いの車輪の回転度を与えることができます。 エンコーダは、角度変位信号を変換するために、非接触法を採用しています。 Micro DC ギヤードモーターとベストフィット。 エンコーダ、プラスチック製チューブ、紙媒介ガスケットなどが同梱されています。

DFRobot ホイール エンコーダ DFRobot 3PA および 4WD ローバー用 (2個パック)- クリックして拡大

  • 電圧: +5V
  • 電流: <20mA
  • 分解能:20 PPR
  • 重量:20g

Customer Reviews

Based on 3 reviews
67%
(2)
33%
(1)
0%
(0)
0%
(0)
0%
(0)
K
Kevin
Medium resolution but easy to set up

Install requires some work to space the encoder wheels with the plethora of washers and spacers provided. I have a different take on the discussion by another reviewer on the interrupts. You do get different counts based on the pin you connect to, but that is due to the Atmega interrupt scheme. Different chips have different interrupt architectures. Leonardo boards use the 32U4 chip, which have a dedicated interrupt signal on pins 2 and 3, while the UNO uses the 328 chip, which does not. If a pin does not have a dedicated interrupt, it gets lumped into a 'pin-change' interrupt with all the other digital pins that don't have dedicated interrupts. When I used a UNO board and pins 2 and 3, I would get 'cross-talk' between the wheels. It seems that the Arduino library gets the interrupt and tries to decide which registered callbacks should be invoked base on the pin states. If there are more than one 'pin-change' interrupt callback, it seems to be able to get confused. I solved this by manually checking for a pin change-of-state in the interrupt handlers. After doing this (and adding some debounce code as well), I got very consistent count numbers.

S
Sydney
Encoders work great but there is some confusing output

These are a little tricky to install on an assembled robot but the instructions are perfect. Once you try to use encoders comes the confusion, at least when using an Arduino mega. I found different readings per wheel and thought there was an encoder problem until I ran an experiment with different intercepts. Someone should write a tutorial on using encoders and intercepts. Here is what I found when using the same encoder at the same speed on different intercept pins: right encoder on intercept 0 (pin 2) Count = 148 right encoder on intercept 3 (pin 20) Count = 28 right encoder on intercept 2 (pin 21) CountA= 28 right encoder on intercept 4 (pin 19) Count = 1276 right encoder on intercept 5 (pin 18) Count = 908 Once you understand this you can make use of whatever formulas per encoder you need to achieve speed or distance results for the wheel pairs.

D
David
inexpensive but effective

Seem to do the job. Gives 5v signal when photo interrupter is blocked by the disk. So far they seem to work reliably. Does not mount on RB-Sbo-02 GM3 - Gear Motor 3 - 90 degree Shaft without modification.

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