Stepper motor is stalling

[ELPUEBLA]

I got a question.

why my cnc router when is cutting the motor is ramdon stop moving, especially in arc , curve sometimes lines too, i thing this is a stalling?

MY SET UP
nema 34 motor
microstepping current set peak 5.7 amp rms = 4.0 amp
micros stepping set 1600 = 1/8
lead screw is 10 tpi

motor tunning

step per velocity inch or mm p min acceleration inch or mm/sec
16000 40 10

by the way i got one power supply for each stepper motor
power supply information

( 3 POWER SUPPLIES ) =
48V 7.5A 360W DC Regulated Switching Power Supply

I HOPE YOU CAN HELP ME THANKS

DO YOU KNOW IT THE COMPUTER PARALLEL PORT HAS TO BE 3.3 VOLT OR 5.0 VOLT BEACUSE MINE HAS 3.3 VOLT OUT

[H500]

If it's stalling only when cutting curves, try turning off the backlash compensation to see if it helps. If it does, one of your accelerations settings might be too high.