In order to get the encoder to straddle the encoder wheel in the chassis I am using, I had to situate the encoder with the connect against the plastic case which tilted the encoder substantially. So I have concerns that slots in the encoder wheel and the optical sensor may not be properly aligned. This isn’t necessarily a fault of the product, but more of an issue with my application. To make this better, I would have to unsolder the connector, move it to the opposite side of the printed circuit board and solder it in place again, plus closely trim the lead protrusions.

I needed a reliable way of determining the velocity and distance driven of my 6WD robot car chassis and this encoder filled the bill.Two of the six wheels on my robot chassis are not motor driven and have a 6 mm shaft available to attach an encoder wheel. I was able to use a precision ream to enlarge the hole in one of the encoder wheels so it was a press fit on the 6 mm shaft. I then centered the encoder board over the encoder wheel and ran a functional test of encoder output which it passed with flying colors.

the product arrive in time and it fits the description