[Goemon]

The Chinese are not going to write anything for you, they are only interested in selling what ever they can, good or bad, I'm not sure why there is no electrical code enforcement of the imports from China

This is information in most cases, is a nightmare for Hobby users, that should not be doing high voltage wiring, before anyone writes this kind of information they should look up there Electrical Codes, or consult and industrial Electrician, 3ph power is not something you just mess with, unless you know for sure what you are doing, videos in most cases are very misleading, and unless they are done by a VFD Drive manufacture, (which there are some ) most all others have some miss information in them

The only country in the world that uses 3ph motor without a Ground is China, this is the reason that you see all these low quality Spindles and AC motors coming from China with no Grounding Terminal, the 3 Pin Spindle Plugs and the none connected 4th Pin on the 4 Pin Plug Spindles all have to be corrected before they can be used


Correct Shield termination and Ground is a must even at Hobby level

Cable Shields terminated at one end provide only electrostatic protection against low-frequency, capacitive coupled interference and emission

Nobody wants to be wiring up high voltage spindles (or anything else) but until somebody comes up with a standard spindle to VFD cable (which they should), they have to if they want to build a CNC machine. It's not realistic to expect that all hobby level users and small shops will hire an industrial electrician to connect their spindle wires. I seriously doubt an industrial electrician would even accept the job. It's hard enough to get a residential electrician to do some wiring for a reasonable price.

I have wired up a bunch of high voltage projects and some that are considerably more dangerous than CNC spindles (like CRT arcade monitors which hold lethal current even when unplugged). I am perfectly capable of following instructions and taking the suggested safety precautions. IMO, where it gets dangerous is when the instructions are wrong or misleading.

This risk is worse for CNC wiring than anything else I have attempted because there are too many people offering conflicting bits of advice. We have no way of knowing who really understands this stuff vs people who are regurgitating innacurate info. Electricity is one area where I like to be 100% before flipping the switch.

It doesn't need to be this hard. With clear, simple and accurate instructions, connecting wires to screw terminals is not a difficult job

[mactec54]

Nobody wants to be wiring up high voltage spindles (or anything else) but until somebody comes up with a standard spindle to VFD cable (which they should), they have to if they want to build a CNC machine. It's not realistic to expect that all hobby level users and small shops will hire an industrial electrician to connect their spindle wires. I seriously doubt an industrial electrician would even accept the job. It's hard enough to get a residential electrician to do some wiring for a reasonable price.

I have wired up a bunch of high voltage projects and some that are considerably more dangerous than CNC spindles (like CRT arcade monitors which hold lethal current even when unplugged). I am perfectly capable of following instructions and taking the suggested safety precautions. IMO, where it gets dangerous is when the instructions are wrong or misleading.

This risk is worse for CNC wiring than anything else I have attempted because there are too many people offering conflicting bits of advice. We have no way of knowing who really understands this stuff vs people who are regurgitating innacurate info. Electricity is one area where I like to be 100% before flipping the switch.

It doesn't need to be this hard. With clear, simple and accurate instructions, connecting wires to screw terminals is not a difficult job

Just last week I was asked to setup / make some cables for VFD drives to Spindles, this is not very difficult to do, if you are uncomfortable in making a simple cable like this then do you think you should be building a machine like this

You will see who's information is correct, by looking it up in the electrical code regulations, they are not easy to understand, still the best place to look to see if you are doing something you should not be doing also, any good professional Video that has been done by the company that manufactures the product, is another good place to look, most you should not look at, as they have many problems that are incorrect examples of wiring Etc, even the pro's don't normally do a 400Hz spindle, just think that a few years ago the Hobby user could not get or use anything other then a hand router

[Al_The_Man]

Nobody wants to be wiring up high voltage spindles (or anything else) but until somebody comes up with a standard spindle to VFD cable (which they should),

Back in the 80's when I started doing CNC retrofits, Mitsubishi, Fanuc etc, these systems all had integrated type spindles, except they were called spindle drives then, not VFD's.
At that time though, VFD's started arriving on the scene for general 3ph induction motor control.There were no defined instructions or any special cable recommended for the VFD to motor.
The cable manufacturers started getting in on the action and the first that I can remember to bring out a specialty cable was Belden.
This is some of their products and instructions.
I made my own.
Al.