I learded from lightburn manual that pressing “Test” button on rotary panel should result a complete turn of the chuck if the mm per rotation is correct. In twotrees manual and tutorial videos this value is 360 however using this value results 1.5 half complete turn instead of one. If this value is 238-240 than it results exactly one turn. If you have any comment on that let me know. Using the value 240 I tried to move the Y axis (the rotary is attached to that axis) exactly with the same mm (157mm) than the circumference of the object a fixed in the chuck (diameter of the object is 50mm and I set the same value for object diameter on the rotary panel). But moving the Y axis with 157mm did not result a complete turn but it ended with at least 10-15% difference. Any ideas? Thank you in advance.