X and Y slip

I ran 5 jobs yesterday making tank parts and it went well except the front of the print started to lift so a little blue tape to hold it down go the job done.

Today the Y Axis only goes 90% of the way out and the X axis only goes 50% before they slip. I can run the X and Y axis all the way using the Ponterface controls but when it moves by itself (auto levelling or print jobs) it slips when it gets to 90/50% respectively.

Edit - Little vegetable oil on the guide edges seems to have done the trick.