Multiple Independant Z and C Axis Control Possible?

a turret head style PnP

That is fasttttt !
Also, reminds me, i never checked what is the fastest servo period LinuxCNC can run at without bringing a modern PC to it's knees ? I did test base period and the lowest i could go reliably and without latency errors was 12000, i think i have a video on youtube driving two servo motors with 200PPR encoders at 2 or more KRPM from a parallel port! Mind you, that was a Fujitsu-Siememns Workstation with 2X4 core Xeons.
The thought derived from thinking how fast can LinuxCNC do a tool change as that is a carousel, but if it has to involve Python anywhere it will not be real time anymore. Or would it?
Still, i do believe it might be able to run pretty fast with Python, and very fast without it.
So, anyone tested the servo period ?
I know i will tomorrow.

Often the com with peripherals such as Smartserial on a Mesa Card is going to be the bottleneck with about 4 or 5khz being the practical limit. (At least that is what I found with my 5i25 hardware trying to run torque mode servos.)

Holy crap, that was fast. (I don't see that working with Linuxcnc)

But back to reality, on a more normal pick and place with a half dozen pneumatic placer "heads" (is that really the right term?) I would not use them as axis or joints. Simply tool numbers, each with their own XYZ offsets, Calling each individual tool number lowers it and raises the others and changes the position offset. easy peasy, no wonky joint or axis magic required.

Oh good, Todd is here, and he has plenty of experience with similar things, most wood machines have 20 or more drills on the same Z axis.
Thank you Todd.

Yes, the multi-line boring heads on larger CNC wood routers would be a good analogy to the way I think I'd control the multiple placer heads on a pick and place. (I work with such routers a lot, but I know nothing about pick and place.)

I am very unfamiliar with how most pick and place hardware works though. Does each air actuated placing head have it's own C axis control? Is it a fine angular control or just 0, 90, 180.. indexing?

tommylight post=237331 userid=17274most wood machines have 20 or more drills on the same Z axis.
 

that's part of what I was thinking . I just haven't seen any LinuxCnC code showing how to deal with that challenge yet.