Hi Gerry,
Trying to set up the auto tool change and auto zero system today...
Some questions,
First question...
My BOB has inputs in 'pairs.. IOW, an input and a ground for that input..
For instance, I have my home switches set up to go active low... when the switch is engaged the high signal input is shorted to the corresponding ground for that input on the BOB. For example the Z axis home input on the BOB is assigned to "Z Home" in the ports and pins page, and when the switch is engaged, it shorts that pin to the "Z--" input in the ports and pins page..
So, my understanding of how this will work for the auto zero/tool change is that I would connect the fixed/moveable calibration plates wire to the 'probe' input and set it for "active low" in Mach 3 (I can set it up for "active high" if that is better).... The I would take the other wire of that input pair and attach it to the router housing or mount.... Looking at the ports and pins page, I see where to assign the probe input, but I do not see where to assign the ground...
So in my case, I have the probe input connected to the parallel port pin 10, and it's corresponding ground pin is pin 21.. It is this ground pin that I do not know how to assign... Or does it not matter in that pin (pin 21) is part of a global ground and doesn't need to be assigned?
Second Question...
I wanted to go ahead and just test it by shorting the probe input to ground (haven't tried this yet), but on the diagnostics flyout, I can not find an LED shown for the probe input.. Is it called something else? Or is it on another page?
Third question...
In your set up guide, you state that the top of the Z axis travel must be zero (home), and that when it jogs 'down' it must go in the negative Z direction.. This is what I have set up on my machine now... However, on the image you have in the docs, it shows Y reversed and Z not reversed.. My Z is currently reversed (green check mark next to Z in the 'reverse' column).. If I uncheck it, then my Z is opposite of what you are saying it should be (and my home system is jacked)... Is the image a typo? Or have I set something else up wrong? I set it up according to the limits video tutorial on the Mach 3 Site...
Anyways, I'm kinda hovering here for the moment until I get these questions answered..
Thanks,
Mark