Hi. I have a Qidi x-Plus. I create an object with certain outer dimensions, and it will print the outer dimensions with very close accuracy (+\- .015). My issue is if I create any type of cutout, the dimensions are NEVER correct. Why?
Just to test the system, I created a cube with 10mm sides. I then created a square 14mm x 14mm, and made it 8mm tall, with a 10x10 cut out in the center (2mm sides). When it came out of the printer, the total outer dimensions were spot on 14mm. The walls were 2.16mm thick, so the cut out was not the right size for the cube to fit into. WHY????

I need to design things with pass through holes for bolts, and it have had to print test runs to find what size hole REALLY is needed for the size of bolt, not simply using the caliper to measure the bolt... Why is a 3mm hole not a 3mm hole???
thanks in advance.