Re: Diy brushless spindle
Interesting and intriguing!
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Re: Diy brushless spindle
The thing to do with your collection of spindles is index them ... rotary table on the Z-axis with the spindles each mounted 72° apart then just spin it to the one you want - like on a CNC lathe. That basically gets you an automatic tool changer. The only potentially difficult bit is locking the rotary table automatically...and maybe the wiring! Hmm you've given me a project now, as if I didn't have enough to make! Use some sort of rotary switch, or just 5 microswitches to activate each spindle automatically. Even snazzier is if the motors are similar you can use one ESC for the lot, and a bunch of relays to switch between spindles...
I should probably use mine more now I'm almost invariably cutting aluminium on my router. It's only 6000rpm (allegedly 6kW) though which is about half what I'd like...
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How much difference do you think using the two double row bearings made versus one? Mine has one double row and something like (can't remember) 5 standard bearings.
Re: Diy brushless spindle
This motor looks like the same as what you used, and it's cheap:
http://www.hobbyking.com/hobbyking/s...idProduct=5144
I'm tempted to get at least 3 of them, plus one ESC, and mount them all along with my existing spindle.
http://www.ebay.co.uk/itm/C10-ER20-1...ht_1682wt_1037
Could get a bit expensive...
Re: Diy brushless spindle
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The thing to do with your collection of spindles is index them ...
hahaha! yep it did cross my mind man but i tend to use the 2000W spindle for almost everything i do and changing spindles is a moment of a job
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How much difference do you think using the two double row bearings made versus one? Mine has one double row and something like (can't remember) 5 standard bearings.
i havnt cut anything with the new one yet jonathan, i was well happy with the old one, i belive it could out perform my machine with the single double row in it but as i was building a new one it seemed silly not to add the second bearing if i could suss a way of keeping the resses perfectly true.... it was a nice surprise when i fitted the shaft and there wasnt any extra friction due to missalignment (its a tough nut to crack)
it will be interesing to see if there is any inprovement but im sure the resonance paterns i get are from my gantry sides
Re: Diy brushless spindle
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This motor looks like the same as what you used, and it's cheap
NICE.... its a bit better than mine.... i must resist i must resist i must... you bugger jonathan!!!!! iv got enough brushless motors
the ER spindle you linked is the one i bought... took about three weeks to turn up but you cant go wrong at that money :)
Re: Diy brushless spindle
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Originally Posted by
blackburn mark
hahaha! yep it did cross my mind man but i tend to use the 2000W spindle for almost everything i do and changing spindles is a moment of a job
So make more of those ... the prospect of not changing tools manually would be worth it for me. That and it'd look pretty awesome.
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Originally Posted by
blackburn mark
NICE.... its a bit better than mine.... i must resist i must resist i must... you bugger jonathan!!!!! iv got enough brushless motors
Resist that one and get this one, it's 280kV so a bit faster!
http://www.hobbyking.com/hobbyking/s...idProduct=2097
Looking forward to a video of the new one running...
Re: Diy brushless spindle
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So make more of those ... the prospect of not changing tools manually would be worth it for me. That and it'd look pretty awesome.
i could murder you jonathan!!
the power and switching would be the easy part... just make interupted slip rings driven by one ESC
the tricky bit is making the capstan rigid without it weighing a ton and having a masive overhang
i dont believe youv got me thinking on this one... iv also got a million and one things going on :eek: "i must get some sleep at least once this week":eek:
it would be nice to have a 5x tool change though:smile: i could go down the pub swill a couple cut the lawn smoke a couple have a manicure come home change slabs have a couple of hours sleep.............zzzzzzzzzzzzzzzzz............
i may ponder this some more but i can sniff a bit of a blind alley coming on :wink:
Re: Diy brushless spindle
Hi Guys...
I've just started to build my router again after a years lay off (got into RC Helis which I fly in B'burn which ate/eats up all my money and sparetime) and have a servo tester (for setting the CCPM swash on the heli up) and spare a few spare ESCs so this is looking interesting!! To start with I'm only looking to cut balsa and ply but as time goes on I'll want to cut plastic and maybe some Ali (when I've made mods to my router.) What would your suggestions be for motor etc? I was thinking of something a little smaller than yours, something like http://www.giantcod.co.uk/xyh5065-27...-p-404605.html with a http://www.ebay.co.uk/itm/C8-ER11-10...item2567df6da9 we have an old Colchester Bantam lathe at work so could have a go at the bearing housing...
Cheers, Neil.
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Re: Diy brushless spindle
hi neil, sounds like youll have no problems with the project:smile:
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
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the layout is not to clear in this picture, youll have to let me know if you dont get it :wink: