[etchings]

I'm almost done with a homemade CNC machine that I've been working on. I've got two final things to work through to finish up and would definitely appreciate some help. My Nema 34 Servo motors are buzzing/vibrating any time they have power. It doesn't matter whether the axis are moving. Also, I have a Huanyang 7.5kW inverter and a 4.5 kW air cooled spindle. As soon as I press Run/Test it faults out within a second with an error code E.OC.A (Error.Over Current during Acceleration). I can't figure out what's causing this. Mach 3 is my controlling software. Any ideas? Thanks for any help you can offer.

Here are the components of my machine:

Nema 34 KL34-180-90 1125 oz/in Servo Motors, Geckodriver G320x drivers, CUI AMT102-V encoders, KL-7220 72 volt power supply https://www.automationtechnologiesin...4-axis-nema34/

C10 Bi-Directional Breakout Board

https://www.automationtechnologiesinc.com/products-page/motion-controllers/c10-bidirectional-breakout/

Huanyang 7.5kW Variable Frequency Inverter (using single phase 220v power)

https://www.automationtechnologiesinc.com/products-page/cnc-spindle/variable-frequency-drive-inverter-vfd-7-5kw-10hp-34a/

4.5kW KL-4500 spindle

https://www.automationtechnologiesinc.com/products-page/cnc-spindle/4500w-air-cooled-spindle/

[wizard]

Servo motors require a bit more setup effort than steppers especially if you dont have a matched set with the driver preconfiguted. Im not familiar with the 320 but there should be adjustments for gain, compensation and the like. Review the manual to determine how to set these.

As for the drive again nit familiar with that unit but there are two possibilities. One is that the spindke is no good. The other is thst the drive is set up wrong. This all assumes correct wiring. So again hit the manual and look for current limit settings, acceleration settings and the like.

[awerby]

Since you bought all this stuff from Automation Technologies, have you asked them about the over-current error? Since they're in the US, you're in a better position for getting tech support than if you'd bought it direct from China. It's probably a setting in the VFD somewhere, but get them to walk you through it. Did you put a braided grounded sleeve over the spindle leads?