Diy Brushless Spindle

[Metsuko]

hi neil, sounds like youll have no problems with the project

id be tempted to go with an ER11 C8 with a little less overhang

http://www.ebay.co.uk/itm/ER11-8MM-S...item231507033b

if you compare this with the one you linked i think youll know what im driving at... it may make little diffrence when cutting balsa but when aiming to cut ali every little bit of stiffness you can gain will help (i have cut ali with mine)

iv used cheep skate bearing in my ER C8 spindle... iv used belleville washers to put some tention between the two outer races.... i havnt had to change them yet but it only gets light use

if you dont put any tension on those skate bearings the balls will skid and self destruct pretty quickly


the layout is not to clear in this picture, youll have to let me know if you dont get it

What is the orange motor name?

[Snowy]

Hi there,
I'm a complete novice with CNC and aero motors and speed controllers. Does anybody know the bits i'd need to order (motors, KVA and speed controllers all a bit of a puzzle) in the UK that would enable me to build something like this?
Thanks in advance

[MISTRY NILESH DHAN]

What maximum rpm can be achived with external rotor motor

can I use VFD for speed control

I found 90 watt 415 v 50 hz external rotor motor. What
capacity VFD it will work with and max rpm

Regards

[minicnc]

I recently bought a cheap Chinese CNC machine and I wanted to replace the stock 555 motor it comes with something like what you guys have shown. Max diamater for the motor that I can use is around 36mm for an inrunner and 35mm for an outrunner and uses a 25mm hole spacing for mounting the motor. I just want to be able to cut acrylic nothing else. what motor would you guys recommend?

[sergey]

Мотор водяного охлаждения OBL29/19 (2375)пойдет под er11

Mod Note: Translated: Engine cooling water OBL29/19 (2375) will go under er11

[Lee Roberts]

Мотор водяного охлаждения OBL29/19 (2375)пойдет под er11

Пожалуйста, говорите по-английски, поэтому мы можем понять вас.Онлайн-переводчик должен быть достаточно, спасибо.

I think he's trying to point us to this: http://www.amazon.com/Thunder-Tiger-.../dp/B007KMZ6V4

.Me

[PunkR0ckz]

Hi guys, I know this is somewhat of an old thread but I registered on this website because of it. I am looking everywhere for those C10, ER20, 100L collet chuck but I can't seem to find one... only found the 50L version and it isn't long enough for the outrunner I bought. I will try reusing this 50L somewhere else, but I need a 100L and was wondering where to get one? I'm trying on eBay, but I can't seem to find any, must be because I live in Canada...

If someone knows where to buy one new C10-ER20-100L collet chuck, please reply to this post, or if you own one and are willing to ship it to me that would be awesome! Thanks a lot and I hope I'll be able to make this DIY since it mimicks exactly what i've been looking to do

[Boyan Silyavski]

http://m.aliexpress.com/search.htm?k...pingCountry=ES

[njhussey]

Thanks for the info Mark I'll have a look at that one. Instead of cheap skate bearings could I not use a single double row AC bearing, would I have to pre-tension it? Saying that I've skate bearings coming out of my ears as I'm planning on using them as the linear bearings on all my axis ;) The only problem I can see for me is making the bearing housing, I looked at our lathe this morning and the tooling is crap as it's only used to take the raised face off flanges etc, not sure when it last had a service either. Will get some Ali bar offcut and have a play I think. Hope it's ok as I was planning on machining my leadscrews on it!

[njhussey]

From a quick search on tinternet it seems that most double row angular contact bearings seem to start at 10mm ID so looks like its the skate bearing route for me...