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| Variable speed for a mill/drill |
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| BillTodd:
--- Quote from: Gadabout on October 03, 2013, 03:24:19 AM ---John, All the motor has are three connections marked "A", "B", "C". The plate says 400/440 volts. I diddly squat about three phase motors cheers Mark --- End quote --- You'll have to find the motor's star-point to convert that motor. http://madmodder.net/index.php/topic,7773.msg83488.html#msg83488 One alternative is to convert a 400/500v VFD to work on 240v (not recommend ed unless you know what you are doing) www.homeworkshop.org.uk/index.php?option=com_agora&task=topic&id=928&Itemid=47 I added a variable speed belt drive to my drill/mill using a scooter variator. It gives a 4:1 range and has the advantage of increasing torque at low speeds (a VFD will be at best constant torque and will probably be reduced at low speed) My mod is completely manual so would need to be motorised for mach3 use. http://wktodd.webspace.virginmedia.com/drillmill/ Bill |
| Gadabout:
Bill, That all looks very impressive! I think with my electrical skils I will be best looking for a new motor than trying to convert the one I have from star to delta considering that it is not really enough horsepower anyway. Just need to figure out what I need there are so many on Ebay .com.au that I don't know what will do the job for my needs regards Mark |
| russ57:
It could be easier than that. My vfd 'powtran' brand will run a 440v motor off 240v just by configuration. I purchased it from eBay Australia, 18 months ago. And I guess the power issue depends on what you intend cutting. -Russell |
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