How much does the cold affect the cnc router

[Steven W]

The passes would be okay for say 80% of the previous passes but then would step out slightly

[EddyCurrent]

I'm thinking that the direction of offset from one pass to the other might indicate where the problem lies.

[Steven W]

I'm thinking that the direction of offset from one pass to the other might indicate where the problem lies.

Hi Eddy, Good call! While I was going through the warm up routine without cutting I could see there was jerkiness on the X axis. When I checked the coupling there was a fracture. Once replaced it ran okay

thanks for pointing me in the right direction

Steven