I just answered your question.Absolute encoder increasing the cost of encoder & hardware requirement for fitting encoder on main gear. And also controller cost as it uses more pins of controller.
Hi,
I´ll try once again:
* What angualr resolution do you need?
* Is it sufficient to store the position of a single motor revolution(0...360°), or do you additionally need to count how many revolutions you ran in one direction? (give a limit)
Klaus
So what exactly do you need to know:Storing only motor revolution is not sufficient as main shaft's 1 revolution is 7.5 times revolution of motor. So need to track main shafts one revolution. Don't need number of rotations of main shaft but it is needed to track position of main shaft (0 to 360).
I don´t know what this means, nor do I understand your calcualtions..Encoder resolution is set to 1000 (quadrature) so to complete one rotation of main motor encoder count is 30000 is required. So 360 degree = 30000 encoder count.
Hi,
Ok, this is a clear specification.
Now please specify how "exact" (= resolution, precision...) you really need.
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Currently you just need a single turn absolute encoder.
There are optical solutions and there are magnetical solutions.
The simplest is a magnet mounted on the shaft and a (two dimensional) hall sensor. There are ready to buy ICs as well as ready to buy encoders.
Klaus
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