Hi!

This is my first time retrofitting a 2.5-axis CNC milling machine (for personal use) and I'm stuck with some problems. For context, the controller I'm using is this Novusun NVCM motion controller (https://www.nvcnc.net/pdf/NVCNC_NVCM_EN.pdf). I have followed the linked manual using Mach3 and the X, Y, Z + homing, soft limits, hard limits, etc. are working properly.

The problem: Whenever I start the spindle, the peripherals of my pc seem to lose power. In my PC#1, the monitor turns off when the spindle is on. In my PC#2, the mouse and keyboard lose power. The power comes back when I stop the spindle. The controller uses a USB to connect to my PC.

Another problem: I can't change the spindle speed using the S-ov slider in Mach3 when the spindle is on. It changes when I turn off the spindle first and then turn it on again.

My VFD: AT1-2200X / XSY-AT1 (https://www.aliexpress.com/item/32924146109.html)

I am hoping to get some answers. Thanks!