[KiwiEngineer]

Cheers again for the info!

I guess this seems like what im after.

https://www.aliexpress.com/item/4000...archweb201603_

As im not too concerned about 24k rpm and i think 12k should be plenty. I think a good 400hz would do me just fine.

I notice these seem to be very popular. I guess it isnt because their so cheap.

https://www.aliexpress.com/item/1689...5a1c1e74KMlqZQ

Rohan

[mactec54]

Cheers again for the info!

I guess this seems like what im after.

https://www.aliexpress.com/item/4000...archweb201603_

As im not too concerned about 24k rpm and i think 12k should be plenty. I think a good 400hz would do me just fine.

I notice these seem to be very popular. I guess it isnt because their so cheap.

https://www.aliexpress.com/item/1689...5a1c1e74KMlqZQ

Rohan

Correct the 4 pole 400Hz is all that most need unless you are using very small diameter cutters then the extra spindle speed can be a good thing

With that VFD Drive yes it is one of the most popular in the 400Hz range, for single phase, go a little larger so like 3Kw you will want a 25A / 30A circuit for your machine power supply

[KiwiEngineer]

Hi Mactec54,

The G-Penny customer support have been messaging me concerned about my choice of VFD. (3.0KW HUANYANG). I mentioned to them that i am not concerned about going 24k rpm and 12k rpm will be fine with me. They then replied and said that the torque would also be reduced and suggested i swap it out for one of these. https://www.aliexpress.com/item/1005...30693e5ffzJpBx

Is this correct? Would there be much torque loss if running both VFD at similar rpm?

Rohan

[mactec54]

Hi Mactec54,

The G-Penny customer support have been messaging me concerned about my choice of VFD. (3.0KW HUANYANG). I mentioned to them that i am not concerned about going 24k rpm and 12k rpm will be fine with me. They then replied and said that the torque would also be reduced and suggested i swap it out for one of these. https://www.aliexpress.com/item/1005...30693e5ffzJpBx

Is this correct? Would there be much torque loss if running both VFD at similar rpm?

Rohan

You are talking with sales people that have no clue as to what VFD would be best, they will sell you anything to make a sale, the one they suggested is only 7A output your spindle has 10A plus so go figure as to what they are talking about, would the Torque change not a chance, not unless they are talking about using vector mode and that can give you better low speed torque, but this does not change the overall torque of the spindle

For your spindle you want the 4 Pole ceramic bearings 12,000 or 24,000 your choice when you go with 4 Pole your VFD Drive choices change

12,000 RPM 400Hz

24,000 RPM 800Hz

So which Spindle you get will determine which VFD Drive you need to get, Fuling is not what I would be buying, as I said they want to make a sale and that is the only VFD Drive they have that will do the 800Hz Spindle, But also what they suggested would not be suitable for either of those spindles @10A

What ever VFD Drive you end up getting it still needs to have more capacity for single phase power supply so 3Kw is the minimum