Help! Ok so I have used my CNC for years now but need to make something with a tight tolerence and only just noticed that when I do a circle of 100mm diameter in Vcarcve the Y axis when cut measures 100.1mm but the X axis is measuring 99.6mm. The larger I go the worse its gets, for eg a 150mm diameter circle is 150.3mm on Y and 149.4mm on X. I have checked all my rods, bearings and steppers and all is snug. My cnc is a 6040 Hobby one. Is there a way of compensating for this loss on the X axis?