Linux cnc calibration for 3040t

Hi everyone I'm sure this has been asked plenty of times but I can't find it anywhere.

I will start of by saying I know next to nothing about linux systems and cnc machines but I have managed to get my machine up and running and cutting fine but my problem Is it is not cutting the lengths and widths I am telling it too.

I have been through the step on wizard and copied setting of a guy from youtube who has the same setup, could something be wrong there?

Thanks for any help guys

Thanks for the info, I wouldn't know where to find all the info for the steppers ect but where do I find the calibration menu, is the the stepcon thing?

Thanks, I think I have fixed it, I'm just looking for the next hurdle now hahaha. Thanks again buddy