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  #1  
Old Fri 08 May 2009, 18:41
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
Lowcost - 3ph spindle

My current project is a lowcost "brushless" spindle. Here's a teaser photo of the prototype

Don't know how well this will work.....hope to complete and test the prototype this weekend

Spindle spec's:
2000watts (~2.5hp)
10,000rpm
ER-16 collet
Attached Images
File Type: jpg DSCN4194.JPG (90.0 KB, 485 views)
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  #2  
Old Fri 08 May 2009, 23:56
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
VERY interesting stuff!
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  #3  
Old Mon 18 May 2009, 23:20
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
Prototype 3ph spindle is complete

I finished my prototype 3ph spindle. Here you see I have it mounted on my little cnc for the first test run.

Currently uploading a Youtube video.....I will post the link once it is complete.

If this all works out well, I plan to purchase a Sherline spindle built for ER16 collets. This will allow me to use bits up to 3/16" dia.
Attached Images
File Type: jpg 3ph spindle.JPG (92.7 KB, 482 views)
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  #4  
Old Tue 19 May 2009, 00:36
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
http://www.youtube.com/watch?v=fPLdHeRQp_w

Here is the Youtube video link.
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  #5  
Old Tue 19 May 2009, 05:24
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
Send a message via Yahoo to Robert M Send a message via Skype™ to Robert M
Isnít it beautifully what a can achieve with proper mindset!!
Nice going Wayne, Robert
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  #6  
Old Tue 19 May 2009, 10:20
lumberjack_jeff
Just call me: Jeff #31
 
Montesano, WA
United States of America
Awesome!

What's your target budget, do you think cooling will be adequate, and do you anticipate the ability to control speed through g-code?
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  #7  
Old Tue 19 May 2009, 14:36
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
Jeff,

The items required to build this spindle cost about $400. Cheaper motors and controllers exist, but I prefer to spend a little extra and be sure of the quality.

The finished project will use an industral Sherline spindle....they are good for 10,000 rpm continous. www.sherlineipd.com/spindles.htm

The motor and controller will require cooling, a simple muffin fan will do the trick.

I believe speed control through Mach3 is possible, but will require PWM frequency conversion. Mach3 produces a base PWM freq of about 5-10hz. a typical RC speed controller operates with a 10x higher base freq (50hz). I am sure a simple microcontroller w/some code will solve the problem....but like everything else it takes a little time and thought to get it to work. For now, I will use a little timer circuit to drive the speed controller...simple and cheap
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  #8  
Old Tue 19 May 2009, 15:51
domino11
Just call me: Heath
 
Cornwall, Ontario
Canada
Wayne,
Wow that looks impressive, have any video of it cutting stuff yet?
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  #9  
Old Tue 19 May 2009, 20:09
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
No cutting video yet....need to mount it to the Mechmate first.
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  #10  
Old Sun 05 July 2009, 09:56
Rad Racer
Just call me: Wayne #25
 
Minnesota
United States of America
Project update. I was not happy with the power output of the motor spindle combo....thought it would be more powerful at the low end. I will probably just breakdown and purchase a factory spindle
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