Really? "As much as you want"? It is not hard at all to build a device that works at the mechanical limits of an encoder but "as much as you want" could be a lot more than what is possible.
There is going to be quantitation noise of the speed. The only way to reduce it is to use a larger sampling period It seems there is already an FPGA connected to the encoder. On Mon, Dec 7, 2020 at 9:24 AM Jon Elson <[email protected]> wrote: > On 12/07/2020 08:47 AM, Todd Zuercher wrote: > > Is it possible to set up a firmware for a Mesa FPGA that could read the > encoder velocity from an encoder input and output that velocity as an > analog command directly to an analog output (hopefully at faster than the > servo thread rate) in order to bypass having to do that connection in Hal? > Can the analog outputs of any of Mesa's daughter cards be updated faster > than the Servo-thread rate? > > > > > You can also get dedicated quadrature to tach converters > (although they are kind of expensive) > that could have as much bandwidth as you want. I've been > thinking about making this one of my products for quite some > time. TOO BAD they discontinued the L290 chip, which did it > all. > > Jon > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
