> -----Original Message-----
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: March-18-21 6:22 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Spindle rps and index
>
> On 03/18/2021 05:18 PM, Nicklas SB Karlsson wrote:
> > Need to orient spindle. Using a quadrature encoder spindle
> > need to be "homed" by rotating up to one revolution to
> > find index pulse but there is no homing for spindle. Know
> > what index pulse is in encoder but what does the index
> > enable signal for spindle do? or how is it used?
> >
> >
> On most encoder counters, if one component sets
> encoder.xx.index-en (or whatever it is called in that
> rendition) to true, and then the encoder is turned until it
> generates the index pulse, the position count will jump to
> zero at that instant. Also, at that instant, the index
> enable pin will be set back to false.
>
> Jon
Interesting topic.
I take it then that you can't actually move the spindle to the index position
unless you have some sort of control beyond velocity?
I'm currently using PWM on mine but once I redo some wiring I can run it with
step/dir. So theoretically it should be possible to move to a 'home' or
'0.000' position. But how is that even done if the spindle is controlled with
M3,M4 and Sxxx?
John Dammeyer
>
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