Using RC Brushless motors as spindle

[blackburn mark]

I ran the motor in for about 5 mins on 12v, soon got bored of that

i wouldnt worry about it jonathan, just use it as you would and keep tabs on how hot the bearing housing gets, i still check mine now and again as im using them, its ony my high speed spindle that shows any signs of struggling and thats only if i push it to 30000/40000 rpm

phils point is confirmed as all three spindles produce less bearing heat as time goes by

[Jonathan]

i wouldnt worry about it jonathan, just use it as you would and keep tabs on how hot the bearing housing gets, i still check mine now and again as im using them, its ony my high speed spindle that shows any signs of struggling and thats only if i push it to 30000/40000 rpm

phils point is confirmed as all three spindles produce less bearing heat as time goes by

I ran it at 3100rpm for 20 mins. The angular contact bearing was very slightly warm - helped no doubt by all the aluminum around it. The stator got a little warmer, still nothing to worry about.

Managed to get 1.5kw out of the motor without it complaining.

I'll have to buy one of these soon to run it at 6200rpm:

http://www.hobbyking.com/hobbyking/s...dProduct=10944

or maybe

http://www.hobbyking.com/hobbyking/s...idProduct=4691

Either way it's a lot of money.

[M250cnc]

Jonathan

Use a fine oilstone to de burr the slits in the collets as they can have tiny burrs which can be a cause of runout.

When checking the runout it the collet mark the high or low point so you can see that they are in the same place vertically when you measure both positions.

Phil

[M250cnc]

Jonathan i have just seen the pictures of a sample of the cut produced by your machine with the spindle.

All i will say is you have balls of steel.

Phil

[Jonathan]

Jonathan i have just seen the pictures of a sample of the cut produced by your machine with the spindle.

All i will say is you have balls of steel.

What did I do wrong this time?

Part was securely mounted...it didn't move. I raised it up to stop the Z axis bending too much and took light cuts.


Thanks for the tip about deburring the collets - I'll try that.