one millimeter smaller

just make the step length correct in the vendor settings. 
you can measure the step length with the following:
1 draw a rectangle as big as possible and cut it
2 measure the actual length 
3 the change the step length again( there are a calculation tool in the vendor setting)

In a 10x10mm square. When cutting, a measurement of 9mm comes out.
In a 100x100mm square, when cutting, a measurement of 99x99mm comes out.
In a 1000x1000mm square, when cut, a measurement of 999x999mm comes out.
Yes, when the cut comes out 9mm. I increase the mm in the "step length" option. What is missing, when cutting the 1000mm square it comes out 1050mm.
  **What I need is for it to only increase 1mm. in any measurement of a square cut