What is needed to wire up 2.2kw 220v Spindle and VFD?

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey David,

@Arzt

I have the Mechatron HFS ER20 (2.2 kw) and Hitachi VFD. Mechatron supplied “Olflex” cable, which seems intended to run from VFD (the already-cut end) to the spindle (connector attached).

congratulations, a good choice. Especially purchasing the spindle cable ready-to-use from spindle manufacturer facilitates everything.

@Arzt

I suppose that cable is shielded. But the article by Wetzel (of Southwire) says to “shield both ends”.

So does your VFD manual, ground the shield at both ends. The good thing about you buying a Hitachi WJ200 VFD (which is practically identical to the Omron MX2 VFD), is that you have an excellent manual that has everything in it that you are asking at the moment. That’s a big difference from the cheap VFDs many people buy here.

So if you scroll upwards inside this thread, up to this post, you have the answer on how you ground at both ends. I posted an image there (the second image in that post), which is an excerpt from the manual of the Omron MX2 which also applies to the Hitachi WJ200.

And it also anwers your next question:

@Arzt

Mechatron sent one (Schaffer Co) “Line Filter” (is that a shield?) but where does it connect?

No, it’s not a shield, it is an EMI filter. This filter is a “footprint” filter which means, its housing has the same footprint as the VFD itself, so that you can attach the VFD on top of it. Thereby they share an excellent ground connection. How it is attached and wired is shown in the same post above (image 2).

Finally you attach both, the VFD which is attached to the EMI filter, to the mounting plate of your control cabinet.

The thread here contains some relevant citations from the VFD manual. I show them from the Omron MX2 manual, but the Hitachi WJ200 manual is practically identical. So everything that I reported from the Omron MX2 in this forum also applies to the Hitachi WJ200.

@Arzt

There’s a tech supply store near me, and I’ll ask about a DB-25 Breakout Adapter. But how is that connected? What is the event sequence? Here’s my first guess:

1. User tells the Onefinity controller to execute the file that he sent from V-Carve as a G-code.

This is done by uploading a g-code file (that you have put on a USB thumb drive) via the Onefinity CNC Controller web interface and hitting or clicking the “Run” button in the Auto Tab of the Tabbed section. Unfortunately there is still no hardware button or I/O pin to tell the Onefinity Controller “Run program” or “Pause program”.

@Arzt

2a. The Breakout Adapter tells the VFD to power up the spindle and adjust speeds as it continues to instruct.
2b. The Breakout Adapter tells the Coolant Pump to run.
2c. The Breakout Adapter tells a shop vacuum to run.
2. On completion of the G-code file, the Breakout Adapter tells everybody to stop.

2a: Yes, over ModBus serial interface (pins 13 and 14) the Onefinity CNC Controller controls the VFD and starts and stops the spindle and sets its speed.

2b and 2c: This is only done by the CNC Controller via the I/O port if you have a router. If you have a spindle, this is done by the VFD, which has output terminals specifically for this. See your VFD manual.

2d: See 2a.

The 25-pin I/O port of Onefinity and Buildbotics Controller is described here.

Since your VFD manual is excellent and contains everything to lead you to the first test run of your spindle, I suggest that you take it as your weekend lecture. And don’t forget to read the spindle manual too!

@Aiph5u

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Weblinks

Manufacturer's page	PDF
Hitachi WJ200	Manual
Omron MX2	Manual

@Arzt

Where does an emergency stop enter the sequence?

This is a topic of its own