Good morning all,

I had this before, someone came in and changed the servo amp. Last night we had a power blip, and again, the x axis is now 7mm out (short) and when it happened before the x axis was out by 7 mm as well. The servo amps and the NC are battery backed up with healthy batteries. I somehow don't think that the X axis servo amp is or ever was at fault, What can cause this, the NC itself? It is a Seiki Seicos Sigma21L, the servo amps are Fanuc A06B-6096-H105 I am a bit baffled, to be honest.
Any ideas?

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