Marius Liebenberg wrote: > Tricky indeed. That is why I decided that Mr Wallace is the expert and I > use his stuff when it comes to servo's. Well whenever it is my choice to > make, I use the Mesa stuff. It just works. > There's also the Pico Systems PPMC, which has a 16-bit DAC for the velocity command. You get 32,767 discrete steps for each polarity, and no thermal drift of the zero or other odd effects due to the vagaries of optocouplers. (It also has specific logic to force the DAC outputs to mid-scale upon E-stop.)
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