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7i92 P2 7i77 serial 7i73
I said above that analog was confirmed, not true as I was seeing parameters, not pins.
I've read many posts about enabling the analog mode for inputs 0-7, but cannot get my head around the syntax.

looks like it might be
loadrt hm2_7i92.0.7i73.0.2 config="sserial_port_0=01000000"

But I'm not certain

Would you check for please.
Thanks

Ah yes I found a similar thread saying the same:

www.cnczone.com/forums/uncategorised-cam...are.html#post2541766

Thanks for the reply JT
I have since reconfigured the axis wiring and discovered that there was a very slight and extremely slow movement which has been overcome by resetting the homing speed . We are still using version 2.7 as we had this working adequately two years ago and I would prefer to ensure we have a working machine before I upgrade the OS and install 2.9.
The homing on our z axis is working extremely well with a pair of relatively new mechanical micro-switches but x and y are proving stubborn with our original switches that are about 20 years old so I will by some new ones and see if their response is better.
We only get to work on this machine a few hours per week so changes are rather slow.
Thanks once again.

i was not happy with the force to spin this thing but it seems the bigger you go the greater the torque needed based on some digging with manufacturer specs i found. i found these that i could buy over seas but they require 3.5 Nm of torque. i'm not sure if that is breakaway or running torque? i'm thinking it's breakaway but i am not sure at this point. if i can figure out a way to test this so i can get a feel for it i might be at a fork in the road moment and end up just biting the bullet and buying these is it seems better than what i was seeing with what i was doing. 3,5 Nm seems like a lot of torque needed?

Last time I had a bit of a succes on preempt_rt with moving the base thread to another cpu (only with 6.13), but perhaps worth a shot.
Change the CPU numbers and run as sudo. In the script CPU1 is the base thread and CPU2 the servo thread.

forum.linuxcnc.org/18-computer/48079-can...cnc?start=390#321927

What value does statusword have?
Look in the manual what that means. That is what prevents cia402 component to ask the drive to enable.
The drive will not enable until that condition is sorted out. Even if you write F to the drive it will reject it until status is fixed.

Hi, Thanks for your further development. I have been away from Ethercat for a long time. In the past I have been experimenting with designing a +-10V PWM for my analog spindle. It works but I have not tested it in practice. I will add this circuit to the Ethercat board. 

Or just pull again - I got it fixed.