Lowcost - 3ph spindle
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My current project is a lowcost "brushless" spindle. Here's a teaser photo of the prototype:D
Don't know how well this will work.....hope to complete and test the prototype this weekend:eek: Spindle spec's: 2000watts (~2.5hp) 10,000rpm ER-16 collet |
VERY interesting stuff!
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Prototype 3ph spindle is complete
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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. |
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Isn’t it beautifully what a can achieve with proper mindset!!
Nice going Wayne, Robert ;) |
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? |
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:) |
Wayne,
Wow that looks impressive, have any video of it cutting stuff yet? :) |
No cutting video yet....need to mount it to the Mechmate first.
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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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