Pi-5, NVMe and Mesa

Thank you all, it's motoring up and down et al now.

The next trick will be to cut things into my DRO but I'm worried about over loading the sensors if I
just wire it in parallel - the impedances are very low. Do I need to buffer things? Like a bunch of non-inverting gates?

Also I'm looking at an MPG wheel I have with A/B quad outputs.
Since I'm only using 3 axis and I have 6 encoder channels should I be able to wire it into one rather than use the input pins
and get numbers. I tried and got nothing on the hal scope but I don't have anything in the mesact setup
for it yet.

I'm trying to read the manual but at 1300+ pages it's a bit intimidating.

if you wire the MPGs to normal encoder inputs,
you should be able to monitor the position or raw count
pins of the encoders in the "Watch" window of halshow.

something like:

hm2_7i95.0.encoder.03.rawcounts

Note that if the MPG has single ended outputs you will need
to jumper the 7I95T encoders for single-ended/TTL mode.

Note that there is an advantage to using the 7I95T isolated
inputs for MPGs in that they support a 1X mode which works
better with 100 PPR MPGs that have a detent, as it gives you exactly
one jog increment per click.