SOLVED - end of this message hi, I have an ox cnc machine assembled and I’m having issues with both x and y axis. Basically when I run a job like a carving job with small details the machine moves like vibrating... while bigger movements it runs very smooth. My board is xpro cnc, I’ve changed from version 2 to version 3 thinking there was something wrong. But no real improvement. I’ve encreased the acceleration up to 500 and realized that only the long movements get better (during the acceleration ramp up before making this change I saw some vibration) I’ve changed the decay mode from mixed to fast as some post suggested it but no improvements at all. I’ve encreased the microstep from 8 to 32 but again nothing what i see is that if i play with UGS, below 0.3 mm jog step, motors don't move unless i reach with multiple steps the 0.3 total. In other world, if i set the step in jog mode as 0.1 mm, I need to hit the step movement 3 times to see motor moves at the third hit, as the board doesnt send any command or the motor is not capable of doing the so small step. making some calculation, with 20 teeth GT3 pulley means each complete motor revolution correspond 60 mm movement, the motor are 200 steps per revolution so each full step is 60/200 = 0.3 mm exactly. so whatever step below 0.3 seems my motor cannot discretize... during jogging I can accept this but during a carving job where small details have to be carved this is a big issue. It seems my motors are not capable of work properly with microsteps. Could someone please help me on this cause I’m getting really crazy!!! Thanks a lot!!! ——————— SOLUTION: Talking with Ryan from Ooznest we realized that my xpro cnc board could have wrong printing for decay mode: so I’ve soldered fast when it actually was slow mode. Making the appropriate soldering (thanks to Ryan) and encreasing the voltage from potentiometer to each axis even if it seems already well set (thanks to Gary and JustinTime) solved the issue. Thanks!!!