If this is actually an issue, it's the first one I've heard of with the ESS. My minor issue while testing for someone else, was so esoteric as to almost not be counted, probing in LATHE!! If there is a slave axis homing issue, it's the first ESS issue I've seen that might actually effect some folks. The ESS has been very solid and I, personally, wouldn't be the least bit afraid to buy one now. And it sounds like Greg is on the slave homing thing.
Tom
Sadly the step/dir spindle issues that have been there since the early days of the USB SS are still present in the ESS so there are still issues. The ESS however solved a lot of the other small niggles I had, none really serious but just quirky kind of behaviour such as on initial start up sometimes I would have to jog an axis before any modbus commands would work, with the ESS thats all gone.
As said the only complaint for me now is spindle, it will occasionally drop pulses for a split second, most wouldnt notice it but with my lathes spindle being very heavy I get quite a clunk.
Another issue is the SRO is very clunky and the drop of pulses for a split second happens a lot more frequently when SRO is in effect One issue that has been been reintroduced in the ESS is if you feedhold then press Stop the spindle will stop abruptly without deceleration, this had happened in the past with the USB one but was fixed a long time ago.
Oh also in threading the FRO is still active, that should be disabled and I think it was in USB SS but it certainly is not the case in the ESS.
All in all I love it and it works extremely well for me except the spindle control and threading issues.
Hood