Originally Posted by
philba
First thing you should do when testing your new cnc router is calibrate the steps/mm. For each axis, jog it a set distance and measure how far it actually goes.. Then use the ratio of jog-distance to actual distance to change the $10x settings. So, if you jogged X by 100 mm and it went 200, then multiply $100 value by 0.5 (100/200).
What you are probably missing is microstepping. It looks like you are dividing. For example, if your drivers are set to 1/8 microstepping, you multiply the number of steps by 8. But you also need to factor in screw pitch (or gear ratios for belts).