Hi all, this is my first thread, if i am not in the correct forum, pls redirect me.
I need some help on choosing the right rotary encoder for my slow speed, large diameter turntable, for angle control.
The turntable is 1 meter in diameter, and I can only add the encoder to the outer rim (gear to gear). This means one complete round of the turntable is equals to many rounds on the encoder. My turnable turns slowly between 0.2rpm to 10rpm. I intended to hook up the encoder to my PC's parallel, separated by a optoisolated CNC4PC breakout board.
My ultimate goal is to enter a value between 1 and 360 degrees. I would like Mach3 to energize turntable, compare the user input value with the rotary encoder reading, the de-energize tuntable when the user input value and the rotary value are equal.
First thing first, that is choosing the right rotary encoder. I am almost sure to use an incremental, as my idea was example 100 pulse count represents 1 degree of turntable. I was browsing usdigital.com vs encoderoutlet.com. Price varies alot, not sure why. And I am not sure how much CPR to buy. I have tried the online calculator, but confuses me even more.
I hoped someone in this forum can give your advise.
Thank you.