Diy Brushless Spindle

[blackburn mark]

I fund that my 15Amp batterycharger doesn’t provide enough power.

http://www.ebay.co.uk/itm/12V-30A-36...item231493182c

i bought somthing like this for mine, iv not tripped it out once so far

My next spindle is going to have 2 or 3 motors 3kW motors on the same shaft, ER-20 up to 27000rpm (ish)

on your router ?... i cant imagine a router making use of so much power, youve got me thinking cutting wood at high speed must soak up the spindle watts

i only ever cut alli and plastics and iv never needed any more than 360W... my top speed is only 1500mm though wich i guess is not worth getting out of bed for in "Jonathan world " :lol:

[Jonathan]

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http://www.ebay.co.uk/itm/12V-30A-36...item231493182c

i bought somthing like this for mine, iv not tripped it out once so far

Not bad, but a fiver down the car boot should get you a computer power supply which will deliver at least that. Just put a resistor on the +5V rail (google it) to keep it on and stable.

on your router ?... i cant imagine a router making use of so much power, youve got me thinking cutting wood at high speed must soak up the spindle watts ]

Wood does with a good size cutter, but that's not the reason as I hardly ever cut wood an no DIY router is rigid enough to use that much power. Why use plywood when you can use 3/4" aluminium
It's for my friend from school who I will be helping (well, letting him use my router - he doesn't need help) build a smaller rigid machine to be used mainly for cutting aluminium and occasionally steel (hopefully)...knowing him probably titanium too. Anyway, the reason for that much power and the whole coil switching thing is to be able to get lots of torque at low rpm, which is useful for drilling/facing among other things. I don't expect to use anywhere near the full rated power of the motors.

Top speed 1500, mm/min? Is that rapid speed or top speed you use when cutting?

[blackburn mark]

Top speed 1500, mm/min? Is that rapid speed or top speed you use when cutting?

owch!!! you buggar! kick a man while he is down lol ..... errrr... thats rapid, i am "slowly" coming around to the idea that a little more speed might help (what did it cost you for your drivers ???? and would i need to swap my 57BYGH76-401A steppers current 2.8A ???)

It's for my friend from school who I will be helping (well, letting him use my router - he doesn't need help) build a smaller rigid machine to be used mainly for cutting aluminium and occasionally steel (hopefully)...knowing him probably titanium too.

youve got to do a log on that jonathan!! :)

[Joe]

The motor is a Thumper 5055, 10.8-29.6V, 1280 watts and 580 KV

Yes the motor does accept more voltage but the charger was the only thing that I had on hand. My Grandpa has an ex-school lab transformer that is 12v,100A which once rectified should provide more than enough power . I just need to find theright sort of low ESR caps, could you recommend any?

Do you think that if I up the current that the motor will be more powerfulor will I also need to up the voltage and use a different supply?

My spindle ESC also gets quite hot after running for more than about 15 mins as well, but nothing excessive. The spindle however gets very hot after beingrun for about 25 mins, I think that I will need to devise some sort of watercooling but I am going to try bigger and more fins and a fan first. The projec tis also my Product design coursework at collage so a big thank you for all your advice

Thank you blackburn mark for the ebay power supply I needed something like that for my audio set up and at that price you can't go wrong so I have ordered one