Stuart Stevenson wrote:
> Gentlemen,
>     When I home my machine it will run through the home cycle but
> instead of setting zero in reference to the marker pulse it will rapid
> to the position it was in when I started the machine. This is the axis
> zero postion in effect before the home cycle.
I'm wondering if you have the polarity of the home switch set 
backwards.  Maybe my machine did the same until I flipped the 
polarity of the hole switch sensing.

In the file ppmc_io.hal, I have :

linksp Xmaxlim <= ppmc.0.din.02.in-not
linksp Xmaxlim => axis.0.pos-lim-sw-in

The ...din.02.in-not sets the polarity for a switch that closes 
on pressing the switch.  You'd use ...din.02.in for a switch 
that opens when pushed.

I never let it run all the way back to the initial position at 
program startup, because I didn't know where it was going to 
stop.  But, it certainly was headed that way, consistently.
So, maybe that is the problem.

Jon

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