My rotary encoder adventures

[Demon]

Here's an example of a chinesium EC11 clone:




Every time I press on the switch built into the shaft, wiper A bounces. Also, note how wiper A never came down at the top left.

So now I have some good quality control tests to do on EC11s that I'll be having made in china.



(I would never have thought of checking for this defect. I'm fiddling with my Saleae Logic 2 probe on a rotary encoder. I just wanted to see how a manual press would compare with the encoder pulses.)


EDIT: These are from AliExpress; you get what you pay for. But when you order from Alibaba, you can get reimbursed if you can demonstrate that a product is not performing accord to specifications.

I don't mind the aliexpress lower quality, I use them mainly for testing.