What pulleys to use for a milling machine and VFD.

[Ian PParticipant @ianp]

That motor looks fine. I know nothing of the seller and I have no idea whether its a good price. It does state that it is OK with VFDs.

I could not say whether its OK for your machine though as I dont know enough about the space available or any of the other details regarding its installation.

I have just been trying to upload some video to YouTube so I can put a link here showing how a very ordinary and old, 1450rpm (Hoover) motor works with a VFD. With 3:1 belt reduction I have a 38 to 1250RPM speed range (4 to 130Hz), and at 20Hz I have more than enough torque to cut a 50mm diameter spotface on aluminium (using a spigoted flycutter with a 14mm wide cutting edge.

Ian

[Chris DentonParticipant @chrisdenton53037]

Excellent, I just watched your video.

Do we think these style pulleys would be ok? They are the timing belt style.

You can click on the picture for a bigger one.

http://m.rapidonline.com/ProductSearch/ModuleDetails?ModuleCode=71294

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Chris Denton on 16/08/2014 01:01:57:

Do we think these style pulleys would be ok? They are the timing belt style.

You can click on the picture for a bigger one.

http://m.rapidonline.com/ProductSearch/ModuleDetails?ModuleCode=71294

.

Chris,

Those appear to be very small pulleys

MichaelG.

[Chris DentonParticipant @chrisdenton53037]

Yes your right, I think that's the wrong link!

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