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tommylight wrote:

You can just wire drives directly to IDC26, but that does require caution in proper wiring as those I/O pins are highly sensitive.

This means no BOB.

Actually I found a mistake in my grub command line.  Now my histogram is better, in that there are only a few excursions to debug now. 
 

It looks like only interrupt that seems to fire at roughly the same frequency is IRQ 20 which is described as

IO-APIC 20-fasteoi pata_pdc2027x[0000:03.05.0]

It is interesting that it fires on CPU1.  I thought I had a command in my grub setup to disable hyperthreading.
 

Fair enough. I thought I had gone through all the steps but I guess I missed it.

I just got a touch probe and want to set it up alongside my tool height setter.

Turns out the tool height setter I bought years ago is NC.
Without even thinking about checking I bought a NO probe which if I am thinking about it correctly if I wanted to wire them into the same pin it would have to be NO.

From what I can tell in reading though it seems like I should be able to wire them into separate pins on my 7i76e, distinguish one as NO, the other as NC, and get it to function properly correct?

And from reading it does sound like LinuxCNC still only has one probe function right? So in the configs I tie both sensors/pins to the single probe function correct?

That is going to be it. I'll make the change and check in the morning.

do you need a bob to use it?

What bob do you recommend me?

There will be some info that mentions modifying config.txt, as this is what the raspi-config utility does.
The HDMI cable that comes with the RPi s doesn't "feel" like the best of quality, so Tommy may have a good point.
The RPi docs have a good explanation of the config.txt file, but just remember that the location of that file on the images is /boot/broadcom/config.txt