Hi,
I did a job to fit Omron servos to a customers machine. I'm not sure whether Omron own Yaskawa or the other way
around, but the servos and drives are identical excepting the logo on the front.

There is no doubt that the Omrons were good, but in the short time I had with them did not observe any major advantage
over Deltas say. It may well be that Omrons quality would show up over a longer time frame but there was nothing that grabbed me.

One area that Yaskawa (Omron) have a market leading position is EtherCat, they have been EtherCat capable for quite some years
and vie with Beckhoff for the prize as the 'best EtherCat manufacturer'.

Craig