Thread: Spindle motors
I have been looking thrugh Google trying to see what spindle motors are available at a resonable cost.
Would anyone like to comment on what spindle motors they use and how good they are?
I will be machining soft and hard woods, plastics and would also like to do aluminium sometimes.
I have had a look at the Kress models, ELTE and a couple of the chinese brand VFDs. Have I missed any?
I have also been thinking about making a belt driven spindle but trying to find a high speed servo might not be too easy or cheaply I might add.
have a look at my build log, iv made three to cover the whole speed range, they are not full proven (bearing life etc) but they do work quite well and are easy and cheap to make
jonathan may at some point work out an interface with mach for these type of spindles
I've got a bit closer with my brushless motor spindle. The chuck and ER16 collets finally arrived yesterday.
(Edit - if you saw the comment with regard to running it from VFD ignore it)
Still got to get a 12s 100A ESC for it and something to power it. Best I've got is a 6s 100a and 24v 92Ah VRLA battery. That'll get 3000rpm - so enough for some things.
Last edited by Jonathan; 11-01-2011 at 06:41 PM.
11-01-2011 #4I'd forgotten about that, sorry! I will look into doing it again with that servo controller soon.
iv been using my larger spindle to fly cut, loving it :)
i use all three spindles at diffrent times, im well chuffed with them
Recently I've made myself new spindle. two taper bearings, ER20 shaft, belt and motor. cheap and very good solution. You can see it at http://malamuterun.co.uk/homemade_cnc_mill_spindle.htm . Maybe this will help a bit
It looks like you're only stopping the shaft of that spindle from moving axially with a grubscrew. Are you sure that's strong enough? Might be difficult to preload the bearings with that arrangement.
I have had a look at various bearings for making a high speed spindle and they cost a small fortune. I can get a set of 15000rpm bearings for £40 for 4 so I might go that way and give it a try.
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