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kell
26-11-2019, 05:36 AM
I have a 1.5kw 220v 400hz spindle fitted on my machine.
All the feeds and speeds for the 1mm aluminium carbide bits are coming in at 50000rpm and up.
Would I need a new vfd as the 60000rpm units seem to be 1,5kw
Chaz
26-11-2019, 09:18 AM
Responded here to your other thread. Please dont open multiple threads to ask the same question.

http://www.mycncuk.com/threads/13189-maching-Aluminium-with-sub-4mm-bits

To get 60K RPM you need 2 things.

A spindle that can run at that speed.

A VFD that can run at the frequency needed for 60K.

Both are fairly expensive items.
Voicecoil
26-11-2019, 10:06 AM
I have a Sunfar VFD that goes to 1000Hz, as my spindle is a 4 pole thing & hence needs 2x the normal frequency. It was a bit more expensive ($140 IIRC), but not outrageous.
Chaz
26-11-2019, 10:15 AM
I have a Sunfar VFD that goes to 1000Hz, as my spindle is a 4 pole thing & hence needs 2x the normal frequency. It was a bit more expensive ($140 IIRC), but not outrageous.

That's not too bad. The spindle will be the pricy item.
kell
27-11-2019, 05:11 AM
unless i am looking at the wrong thing i can get a vfd and spindle for around £450 which i do not think is out of the park
Chaz
27-11-2019, 08:47 AM
unless i am looking at the wrong thing i can get a vfd and spindle for around £450 which i do not think is out of the park

Fair enough. Can you link what you are looking at?
Voicecoil
27-11-2019, 10:51 AM
BTW, Jian-Ken who I got my spindle from, make a number of high speed models - and if initial tests with mine are anything to go by they're a notch above a lot of Chinese product. Time will tell of course how deep the quality goes!
Chaz
27-11-2019, 11:00 AM
BTW, Jian-Ken who I got my spindle from, make a number of high speed models - and if initial tests with mine are anything to go by they're a notch above a lot of Chinese product. Time will tell of course how deep the quality goes!

What do they cost?
Voicecoil
27-11-2019, 01:44 PM
Mine was about £325 landed - but it was a rather different beast to the subject of the thread, a 4 pole constant power 24K thing. Suggest you email them for a price: [email protected], the lass I dealt with was called Wafer (!). For a 1.5KW 60K spindle I think the part number is JGD80/1.5R60.