Well, actually I can.  Homing works now.  

The commands other that movement still go nowhere in Machinekit, but things are talking and moving.

I've altered the spooling rod size to be a little smaller to increase my attainable resolution.  I should get about 30% better resolution now.

Overall top speed will still be in the 300mm/sec range.

So, I have spent the last 24 hours printing versions of my coupler again to get it perfect.  When I printed it before I was relying on over-extrusion, this one does not.

I scavenged a vacuum sensor from a friends teardown of an ink cartridge filling machine.  5v, 0 to -100kpa, analog out, but preamplified.  I'll need to divide that down to feed it to the BBG's max ADC voltage of 1.8v.  Should be pretty simple, except it needs some support caps I need to find.

Machinekoder may be able to help me out with "turning an RC servo into an axis" code as I'm running short on time.   I got injured and lost a day with a trip to the doctor, and much of the rest of the day to being a little out of it.

It's probably going to be a long night.

I hope to test the whole thing tomorrow, boards and all.  It will be a steep learning curve so who knows how far we will get... but here we go..  :)

EDIT: Well it just got longer.  I've decided to add a second bearing block to each stepper to eliminate needing to precisely align the spooling rod to the stepper shaft.  Any wobble here would translate into the entire build area being screwy, so it's kinda important and eliminating it has been challenging.  Even after I had it perfect, upon installation it was screwy again.  This will work better in the long run and will be a lot easier for everyone else to replicate.

Printing.