<div><div>I suspect that standard drill chuck is much too large to mount small endmills like 1/64 or 1/32 and turn them at 20,000 rpm. There has to be something more the size of a dremel chuck out there. Ideally I think direct drive is the way to go and a belt if I can only find a chuck with a shaft.</div>
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<br><br><div class="gmail_quote">On Wed, Feb 9, 2011 at 8:48 PM, Paul (Maker Engineering) <span dir="ltr"><<a href="mailto:paul@makerengineering.com">paul@makerengineering.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<p>Oh and not sure about that one in particular but most drill press chucks are friction fit. (very slightly tapered hole and you pound it on)</p><div><div></div><div class="h5">
<div class="gmail_quote">On 2011-02-09 8:31 PM, "Richard Guy Briggs" <<a href="mailto:rgb@tricolour.net" target="_blank">rgb@tricolour.net</a>> wrote:<br type="attribution">> On Wed, Feb 09, 2011 at 07:38:42PM -0500, Paul (Maker Engineering) wrote:<br>
>> Something like this:<br>>> <a href="http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en" target="_blank">http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en</a><br>
>> <br>>> <<a href="http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en" target="_blank">http://www.canadiantire.ca/AST/browse/6/Tools/PowerToolAccessories/Chucks/PRD~0545561P/Mastercraft%252B3%25252B8-in.%252BChuck%252BWith%252BKey.jsp?locale=en</a>>probably<br>
>> designed to fit on a standard shaft (like 8mm, or 6mm rod cut to length,<br>>> maybe turned down a bit).<br>> <br>> How does it attach to the shaft?<br>> <br>>> Mount a pulley on that, to drive it by belt<br>
>> <br>>> Then drive it with one of these:<br>>> <a href="http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480" target="_blank">http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480</a><br>
>> <br>>> <<a href="http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480" target="_blank">http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8480</a>>Capable<br>>> of 40,000 RPM at 12V, and at max power (which you would have a hard time<br>
>> sourcing the amps for), it can put out half a horsepower (in it's optimal<br>>> power band).<br>> <br>> Holy crap! that's barely larger than a cubic inch!<br>> <br>>> Power the motor with something like one of these guys:<br>
>> <a href="http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299" target="_blank">http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299</a><br>>> <br>>> <<a href="http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299" target="_blank">http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9299</a>>with<br>
>> a small fan on it (or hell mount a fan on the shaft of the motor before the<br>>> pulley and use the backwash to cool the motor and the ESC). Feed it direct<br>>> 12V from your PSU, and feed it a pwm servo signal to accurately control<br>
>> speed of the spindle.<br>> <br>> A PC AT or ATX power supply modded should be easily able to supply that.<br>> <br>>> Simple, effective, and affordable. :)<br>>> <br>>> - Paul<br>>> <br>
>> On Wed, Feb 9, 2011 at 6:51 PM, Darcy Whyte <<a href="mailto:darcy@siteware.com" target="_blank">darcy@siteware.com</a>> wrote:<br>>> <br>>> ><br>>> > Great idea.<br>>> ><br>
>> > I could run the spindle chuck from a belt or I could try and find a chuck<br>
>> > that could mount on the shaft. Nothing shows up in ebay but I don't know<br>>> > what to search for. I'll keep fishing around...<br>>> ><br>>> > Darcy<br>>> ><br>
>> ><br>
>> > On Wed, Feb 9, 2011 at 6:21 PM, Paul (Maker Engineering) <<br>>> > <a href="mailto:paul@makerengineering.com" target="_blank">paul@makerengineering.com</a>> wrote:<br>>> ><br>>> >> I would say get a shaft that fits a stock chuck (drill press chuck for<br>
>> >> example)<br>>> >><br>>> >> Mount a pulley drive on it, and drive it from an RC Brushless DC Motor,<br>>> >> with an RC Speed controller. You can send it simple servo signals (pwm) to<br>
>> >> control the speed accurately and easily, and the whole thing would be quite<br>>> >> high torque, and fairly cheap. And no fancy electronics to power the motor,<br>>> >> just feed it raw 12VDC from your main PSU.<br>
>> >><br>>> >> - Paul<br>>> >><br>>> >> On Wed, Feb 9, 2011 at 6:15 PM, Darcy Whyte <<a href="mailto:darcy@siteware.com" target="_blank">darcy@siteware.com</a>> wrote:<br>
>> >><br>
>> >>> Hi,<br>>> >>><br>>> >>> I want to make a couple small CNC mills for fun. I decided the Mantis is<br>>> >>> too small so I am doing other designs. I want to use it for cutting balsa<br>
>> >>> wood and the other for more general purpose.<br>>> >>><br>>> >>> I am looking for ideas for the spindle for cutting balsa wood. I think if<br>>> >>> it had an 1/8th chuck so I could use my 1/64th end mill that would be cool.<br>
>> >>><br>>> >>> Any ideas what to use for the spindle??<br>>> >>><br>>> >>><br>>> >>><br>>> >>><br>>> >>> _______________________________________________<br>
>> >>> Lab mailing list<br>>> >>> <a href="mailto:Lab@artengine.ca" target="_blank">Lab@artengine.ca</a><br>>> >>> <a href="http://artengine.ca/mailman/listinfo/lab" target="_blank">http://artengine.ca/mailman/listinfo/lab</a><br>
>> >>><br>>> >>><br>>> >><br>>> ><br>> <br>>> _______________________________________________<br>>> Lab mailing list<br>>> <a href="mailto:Lab@artengine.ca" target="_blank">Lab@artengine.ca</a><br>
>> <a href="http://artengine.ca/mailman/listinfo/lab" target="_blank">http://artengine.ca/mailman/listinfo/lab</a><br>> <br>> <br>> slainte mhath, RGB<br>> <br>> --<br>> Richard Guy Briggs -- ~\ -- ~\ <<a href="http://hpv.tricolour.net" target="_blank">hpv.tricolour.net</a>><br>
> <<a href="http://www.TriColour.net" target="_blank">www.TriColour.net</a>> -- \___ o \@ @ Ride yer bike!<br>> Ottawa, ON, CANADA -- Lo_>__M__\\/\%__\\/\%<br>
> Vote! -- <<a href="http://greenparty.ca" target="_blank">greenparty.ca</a>>_____GTVS6#790__(*)__(*)________(*)(*)_________________<br>
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