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Best quadrature encoder system for Stingray — Parallax Forums

Best quadrature encoder system for Stingray

jedixjedix Posts: 2
edited 2012-09-28 00:21 in Robotics
Hi everyone,

I read 2 topics about encoders for Stingray :
- http://forums.parallax.com/showthread.php?126385-NEW!-Quadrature-Encoder-PID-Controller which promote the QME of Lynxmotion (http://www.lynxmotion.com/p-448-quadrature-motor-encoder-wcable.aspx), this encoder seems to be quite accurate and a reliable solution
- http://forums.parallax.com/showthread.php?139785-Stingray-Robot-Kit-(-28980)-and-Wheel-Encoders some official (by Parallax) encoders are about to be released very soon, but are they better than the ones from Lynxmotion?

I would like to get the most accurate system (as I am a French customer, the shipping cost and price could make the difference too ^^), could you help me please ? Thank you :)

Comments

  • RobotWorkshopRobotWorkshop Posts: 2,307
    edited 2012-09-27 20:16
    I've been using a set of the Lynxmotion encoders on my Stringray and have been happy with them. They were easy to install and connect. It seems that most of the others are using these as well. I'm not sure if the Parallax version for the Stingray is available yet.

    Robert
  • LoopyBytelooseLoopyByteloose Posts: 12,537
    edited 2012-09-28 00:21
    Some motor makers provide very high quality motors with planetary gear boxes and quadrature encoders with resolutions as high as 500 lines per revolution.

    Pololu, Parallax, and Lynxmotion tend to provide complete packages (encoders, wheels, geared motors, and motor mounts) with lower resolutions for less cost.

    So much really depends on how high a resolution and solid a motor you need. EBay offers some interesting alternatives if you are willing to choose first-rate quality and have the tools and skills to make motor mounts, wheels, and so on.

    I think if you want the highest quality, you may have to start from scratch rather than use a Stingray platform. Pololu is excellent in terms of reliable quality, just not the highest resolution.

    There is also a question of whether you want raw quadriture data or to have the data managed for you. Parallax has boards that interpret the quadrature, not raw data.

    http://www.ebay.com/itm/C93309-Lot-4-Faulhaber-3557K020CS-Minimotor-Motors-30-1-3-71-1-10BP4-Encoders-/290765915904?pt=LH_DefaultDomain_0&hash=item43b2ffc700
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