I would sense the RPM directly at the spindle... not at the motor. Then use gearchange so that the system knows what range you are in to send the VFD the correct signal for wanted speed.
Sensing at the motor doesn't account for belt slip either, and that would make rigid tapping iffy IMHO. just my thoughts On 02/09/2017 11:56 AM, Gene Heskett wrote: > Greetings everybody, from the fringe of the snowstorm in the upper right > coast; > > One of the things I would like to do is to change the full scale range of > the pyvcp tachometer, which is set in the panel-pyvcp.xml file at > present. > > I can of course edit that and restart LCNC, but until such time as I get > some sort of a photocel/ir-led setup to determine the belt position, I'd > like to setup a pair of gui buttons to change that full scale range. > > That looks like an 8 step up-down button pair for control. > Its not a problem to edit up 8 copies of the xml, or perhaps just 8 > versions of the text changes needed. But how do I get pyvcp to > re-execute and redraw the tach with the changed values? > > What do you folks recommend? > > The missus was walking, slowly and tenderly with a walker last night, so > she will be ok in due time. > > Cheers, Gene Heskett >
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