Thread: Huanyang VFD and Spindle motor

Hello everyone,

I recently got the DIY CNC itch, and I just couldn't help it...I had to scratch.

It started about 1-1/2 year ago and I worked on a project, codename "Angry Termite" it on and off; when it got too frustrated I left it alone and worked on some other project, and I went back with when I found a solution for the cause of the frustration. So, after all this time, I finally finished it: a 3 axis, 80/20 structural aluminum frame CNC router which I run using Mach3.

A month or so ago, I started reading on CNC forums about been able to control spindle speed, pumps/vacuum machine on/off, etc. So I purchased a Huanyang VFD with its corresponding spindle motor. I live in sunny California, and as you probably already know, we have, 110V for domestic use, and for heavier duty work 220V.
I am not an engineer, only a chemist, but I have a natural ability to absorb this type of knowledge and figure out things on my own, but to keep it simple, I chose a 110 V VFD and 110 V water cooled 0.8 kW spindle motor (I knew I should have been a mechanical engineer!)

After going back and forth with the ebay vendor for a good 10 days (mostly due to a language barrier) about receiving a defective unit (the right digit on the display was kaput, DOA), and a motor that showed clear signs of being a used one (in spite of it being sold as new), I managed to setup the main PD parameters, hooked everything up, gave it juice and to my surprise, everything worked! The spindle spooled up like a jet turbine!

I can't remember the exact PD settings, but the display climbs up to 400hz, and max RPMs 19520. Now here's a couple of questions:

1. The AC input is single phase 110V (live, neutral and ground), the output, or spindle input, are 3 wires but none of them is a ground. Which is the best way to connect a ground to the spindle? Do I just run a ground wire from the VFD terminal and secure it to the motor input connector with some type of clamp?

2. I understand that I should be able to run the motor to a max of 24,000 RPMs, but is this limitation due to the use of single phase 110v, or is there a PD setting that I missed?

Yeah, I read the manual that came with it, but my Chinese is not that good...In fact, I don't speak it! (but I found the English version. Confusing as hell, though)



Cheers,

Gustavo