Hi Brains trust, Working with my new CNC router and doing some testing with aluminium. I am trying to cut some brackets out of 5083 aluminium to fix my router frame to the bench. When cutting the spindle RPM is fluctuating depending on the profile being cut if I set the spindle speed above 10000 RPM. Ideally I am trying to cut at 24000. Attached is the G-Code and below is a sample video of the job running at an elevated Z home point to demonstrate the change in RPM. Ignore the broken bit and the spindle bearing noise (warranty issue being pursued). First attempt at cutting aluminium with this G-Code. I have been cutting ply with no problems at all, but I am cutting ply at 10000RPM. The machine is using a xPro v5 controller and CNC.js. The VFD is a Follin connected via 0-10V.