RC Brushless spindle

[Lee Roberts]

P.S.Sorry for a little off topic, F the router, lets make some SPINDLE!
and..sorry for my a little "better" then google translate, english :-) .

Hey your English is 100% better than my slavic language so dont worry !

[volcano]

Hey your English is 100% better than my slavic language so dont worry !

It`s not so hard to learn slavic as we use a lot of hands/guns in our conversations. :-)
I`m just kidding, people here, are very polite and friendly!
Cheers!
P.S. As this is off topic , again... i`ll edit this (after you read it) into something useful for future spindle build! :-)

Edit: What are you think about my spindle conception ?

[volcano]

Lee said that ppl here love pictures...
So here they are... :-( , but not happy ones.

So... motor come today. I was very happy, but my happines lasted for about 10 sec, and then pufffff...

[volcano]

Update:motor returned.
Looking for new one... 500-600kv.
Any suggestions?

[njhussey]

Update:motor returned.
Looking for new one... 500-600kv.
Any suggestions?

The kV of the motor you need will depend on the Voltage you're going to run it at and what you want to cut.

[volcano]

Hi, tnx for replay,
I want to cut a little of everything (alu, pom, mdf , some glass etching), (Glass isn`t obligatory - i can do it with my dremel tool @ 20000+ rpm). So... first alu , than acetal and mdf.
I know that`s hard to do with one motor, but hope it isn`t impossible.
Now as i`m not "bound" to previous motor specs, i would like to go "around" and start with psu i`ve got already- 12V30A. Read here that similar psu-s are already used - not for max motor efficiency , but still, for something useful.
I`ve heard that 24v cause hot motor ( and i have 24v@4-6A, only)
So if i go with this cheap psu what can i drive with it?
Some other suggestions?
Cheers!
P.S. They say that i can keep this 270kV. Any use of that thing (if it works- i have not tested it yet as i don`t have esc and servo tester yet)?

[njhussey]

The problem is with 12V and 270kV you'll only have max 3240 RPM which is from a practical point of view too low for Ali, Plastic and MDF, well technically it's not but the feeds will be very slow. With 24V yes you will have to think about cooling the motor (a couple of 12V PC Radiator fans in series mounted round the motor would do it) if you're doing long runs but you get better speed. I ran my spindle off 2 HP Server PSU's wired together to give 24V (and over 1000 Watts) and it was fine, but I didn't do many long runs and didn't use it in anger as I have a 2.2kW water cooled spindle which is fantastic! If I made one again I'd put water cooling in the bearing holder body as they do start to run hot after a while.

One suggestion is to make the spindle unit (don't over engineer it) and have the motor drive it by belt, if you make an adjustable motor mounting plate (or different ones you can swap over) then you can use different kV motors depending on what you want to cut, so larger lower kV motor for cutting Ali, MDF and Plastic and high kV smaller motor for engraving glass etc...