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Unread 10-12-2015, 19:01
Ty Tremblay's Avatar
Ty Tremblay Ty Tremblay is offline
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Re: Rotary encoders vs. price

Quote:
Originally Posted by NWChen View Post
I'm having trouble reconciling what differentiates popular FRC rotary encoders, especially since their price varies so much. For example, based on DigiKey:
  • AS5145B Quadrature Magnetic Encoder; $38; 0.0879deg resolution
  • Grayhill 63R Quadrature Optical Encoder; $54-$75; 64PPR encoder more expensive than 256PPR encoder?
  • TT 6120 Hall Effect (Absolute?) Encoder; $15; 0.088deg resolution
  • CUI AMT203-V Absolute Encoder; $49; 0.2deg resolution

I know max RPM and mechanical life varies between each encoder, but what else accounts for each sensor's price difference/popularity?
The Grayhill encoders have internal bearings, which increases the cost.
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