Fingers crossed it'll cut ally

[blackburn mark]

nice one jonathan, yea iv programmed the ESC for soft start, 14 poles etc.

iv run both large motors for 5mins 12v no load without to much heat in the ESC or the motors
i exspected way more... we'll find out eventualy what they do under load

the huge 130kv brushless motor you have (if its the one im thinking it is) has a 12mm
shaft wich is good news as far as A/C bearings are concerned and if you have a butchers on ebay you should be able to find an ER11 C12 L100 straight collet shaft,, that should drop straight in:naughty:
cheak how much shaft you need though as these have only 100mm of shaft!

[Jonathan]

Yes it's the motor you're thinking of! It's currently in pieces since I'm altering the wiring so that I can change it between star/delta for higher torque/rpm etc. You may mant to consider this for your motors? Easier to swap a few wires than change the motor, perhaps.
I've found the straight collet holder - that looks ideal (thanks!), except the shaft is a bit short! I'd prefer ER25 though since I've just bought a set of ER25 collets for my milling machine. I'll have a look around for one / make one if necessary.

The bearings in the motor are already pretty huge. The one at the 'back' is a large thin section bearing about 65mm diameter if I recall correctly.

Maybe create a thread about using these motors?

[blackburn mark]

jonathan... good luck with the ER25, iv seen a few of these ER straight shafts with 150mm to play with,,
cant remember seeing an ER25 though
if you get chatter i would consider at least a double row A/C bearing at the sharp end,
they are already pre loaded and ready to go

[z3t4]

Maybe create a thread about using these motors?

Yes please!

There was an article in MEW (Feb 2008 issue, No 135 ) about making outrunner motors but there wasn't much about how to power them. I'm guessing that the 'servo tester' provides a PWM pulsetrain and the speed controller (is this aka an 'ESC'?) sees the pulsetrain and uses electromagick to provide a 3-phase supply to the motor.

John

[blackburn mark]

[QUOTE=z3t4;14653]Yes please!

it will be a while before i can report any findings on mine... i cant wait to see how jonathan gets on with that monster motor of his and what he gets with the "star/delta" wiring (i have no idea what that is and im just about burnt out on research)