CNC router occasionally makes jarring noise and home jumps when it does this. Help!!

[JAZZCNC]

100% the noise is motors stalling from being over tuned and trying to cut too fast.

Looking at the speed you where cutting at I think your being too ambitous on the Feed n speeds for this little machine and the motors are running out of torque and thats why your getting stalling motors.

Drop the feed rates down and try again and I think you'll find it works fine.

You could play with motor tuning which would help but I think your just pushing the little thing too hard.!! . . .. Try lowering the Accel first if you adjust motor tuning has that will have the biggest affect and would cause this kind of stalling/missed steps.