RC Brushless spindle

[volcano]

Thanks for your advices, as always. This means a lot for me in my future building. One thing is to just read topics... and completely different thing is when someone experienced push you in wright direction :-), as you all know.

It`s done. I order this:
http://www.ebay.com/itm/N5055-1450W-...QGNF7nYDNiv2jQ
The 270kv one, will wait for now (if it works, anyway). I`ll build belt driven spindle later, i hope.
For now, i want to build direct drive spindle, to be my first. :-)
I found those bearings:
http://www.ebay.com/itm/1Pcs-708AC-7...QAAOSwpP9Y7IHm
Are they good, or to go with cheapest ceramic skate bearings? ...or steel ones?
I asked this because i already gone on cheapest route ( motor, collet shank...esc...).
I need this answer as quick as possible ( because of shipping time )
Hope you`ll understand.
Cheers!

[volcano]

While waiting for motor,chuck,esc... to arrive, i`m thinking about hooking this spindle to arduino (grbl1.1 with pwm variable spindle controll).
Can this item be "in between" esc and arduino? Check it here please:
http://www.ebay.com/itm/Pulse-Signal...EAAOSw1S9We2se
If this can be used it would be great. By the way...if anyone here control esc with arduino with grbl, let me know, how, please?

[volcano]

Where are you folks? I started to feel that i wrote here for myself pleasure only!
Anyway, new build idea...
I think i`ll add 1 of those bearings in spindle nose and then add skate ones after.

I think that this will eliminate axial force on ("next in row") radial skate bearings.

P.S. I must construct proper housing for this combo.
Cheers!

[volcano]

Hi,
New motor came, but again bad news. Motor came damaged due poor packaging.

Can this be repaired? How to balance it?

Good news is that C8 ER11A 100L Collet Straight Shank Chuck Holder finally arrived,
and it`s good quality. I also ordered dial test indicator to help me in my future spindle build,
and other project... very handy tool.
Cheers!

P.S. This topic is watched (by the counter info) but it`s been a while since no one write here.
Please help me with all my doubts and questions above.
P.P.S. Those bearings from above... can they handle spindle rpm?

[Clive S]

Hi,
New motor came, but again bad news. Motor came damaged due poor packaging.

Can this be repaired? How to balance it?

Good news is that C8 ER11A 100L Collet Straight Shank Chuck Holder finally arrived,
and it`s good quality. I also ordered dial test indicator to help me in my future spindle build,
and other project... very handy tool.
Cheers!

P.S. This topic is watched (by the counter info) but it`s been a while since no one write here.
Please help me with all my doubts and questions above.
P.P.S. Those bearings from above... can they handle spindle rpm?

I read most topics and help where I can but I have never played with this sort of thing in this situation so I am at a loss.

Can you return the motor as it looks shot (no pun intended)? I have no idea if the bearings are suitable, I have used that type but at low speeds. Good luck with the build.

[volcano]

... whatever bearings you use will need a preload on them to stop them from skidding. ....preload them with something like bellville washers.

As you already know, i read all yours conversation with blackburn mark an others about preloading when you was building your spindle. But everything is a little confusing to me, as English is not my language. So i draw a sketch in mspaint( 1000 words) to clear things. Simply answer to numbers with tight/loose relations between parts. For example, i think 2 and 3 are tight connections.
Then, please explain "preload". Is that, to tightening a housing cap with housing to press outer bearing ring, or something else?

I think it would be a great help for me and others to see all relations in one place, so thanks in advance.

[volcano]

Things are start to get moving...
I hook up the motor, everything works.
Motor sound way unbalanced, make huge vibrations in mid range ( @12V ) rpms.
But the dial tester says just a 0.01 runout???

turn motor by ~70 degree left sims to give bigest value....( see sticker on rotor -1st pic)

By the way this is the first time to use this dial test indicator ( just arrived ), so i think that
maybe the tool is not precise, or i`m doing something wrong???

Anyway, next thing is ...to build a tachometer to measure rpms...
Cheers!

[njhussey]

Hi,
New motor came, but again bad news. Motor came damaged due poor packaging.

Can this be repaired? How to balance it?

Good news is that C8 ER11A 100L Collet Straight Shank Chuck Holder finally arrived,
and it`s good quality. I also ordered dial test indicator to help me in my future spindle build,
and other project... very handy tool.
Cheers!

P.S. This topic is watched (by the counter info) but it`s been a while since no one write here.
Please help me with all my doubts and questions above.
P.P.S. Those bearings from above... can they handle spindle rpm?

Without doing a google on a bearing site I cant tell you if they're suitable. However whatever bearings you use will need a preload on them to stop them from skidding. The best bearings to use (apart from a double row AC bearing) are magneto (single AC bearings) bearings and preload them with something like bellville washers.

Sent from my HUAWEI VNS-L31 using Tapatalk

[volcano]

Can you return the motor as it looks shot (no pun intended)? I have no idea if the bearings are suitable, I have used that type but at low speeds. Good luck with the build.

I`ve got a 2/3 refund without returning it, so it`s my 2nd defective junk motor in collection.
So i`ll try one more time...( i think that you have the same joke about "3rd luck" )
I checked few companies for this type of bearings. All of them are low speed indeed, so no go.
Finally, thanks for your wishes.
Cheers!
@ routercnc,
Thanks for your replay and kind words, too.

[routercnc]

Hi,
New motor came, but again bad news. Motor came damaged due poor packaging.

Can this be repaired? How to balance it?

Good news is that C8 ER11A 100L Collet Straight Shank Chuck Holder finally arrived,
and it`s good quality. I also ordered dial test indicator to help me in my future spindle build,
and other project... very handy tool.
Cheers!

P.S. This topic is watched (by the counter info) but it`s been a while since no one write here.
Please help me with all my doubts and questions above.
P.P.S. Those bearings from above... can they handle spindle rpm?

The reason you don't have many replies is that it's been a while since anyone has posted on building their own spindles from brushless motors.
Most of the regulars on here bought a water cooled Chinese 1.5 or 2.2 kW spindle a long time ago because they work really well and are good value. They are highly recommended.
No-one on here is holding out on you and not answering, we just don't know how to help. Sorry but I've never used Arduino, grbl, etc.