ok...I'm wondering if somehow the pulse count setting on your controller has been changed/corrupted?

that would give you a stretch/shrink on the y axis...it is a computer, and these things do happen.

Lube...I like this stuff because it seems the wood dust and aluminum chips just do NOT stick to it...

I was using a petrol based lube, but man it was picking up like a dust magnet..what a chore cleaning it...

this stuff seems to repel the sward, doesn't attract dust/chips at all...