I am using Kiri:Moto with Onshape and a cheap 3018 desktop router. I am cutting light plywood using a 1/16" bit. For 99% of what I am doing this combination is very accurate. I have noticed an issue when creating “tabbed” joints (like from one of the online tabbed box generators, but same issue when I draw the joints myself). The issue is that the size of the tabs and slots isn’t accurate. For example, if I want a 20mm wide tab, it may be 20.3mm and the slot it is supposed to fit into is only 19.6mm. I always have to touch up the tabs and slots with a Dremel to get things to fit.
Is there a setting somewhere that I can compensate for this tendency? Or do I need to calibrate the machine and modify its settings? A recent part that was supposed to be 100mm x 40mm ended up 99.9mm x 40.3, so the calibration is off a little, but not by the amount of error I am seeing in the tabs and slots.
Thanks!