Gallery, Projects and General > How do I??
brushless dc motor conversion??
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jim:
does anyone know of a guide to upgrade a mill to a dc brushless motor??

i've been looking at the RS site, but my understanding of electricity is not great!

i've got a Weiss WMD20 mill (similar to Chester 20v), that needs sorting out!

thanks, jim
HS93:
you need a motor and inverter to go 3 phase, if that is what you mean, I have just done it with my Lath and it is great lots of torque. I used a http://www.newton-tesla.com/machinist/index.htm  and if you ring them they may have a package that suits you.

Peter
raynerd:
Jim, doesn`t the WMD20 come with a 3/4HP dc motor and driver board anyway?

http://www.weiss.com.cn/products/wmd20v.php

Do you mean it is broken or what exactly are you trying to do ?

You can replace the driver board I expect with something like the X2 replacement that Arc Euro stock but it is expensive at £125. Mine blew up but I managed to fix it for £1.60, which was better than a new board. I always presumed these DC motors were brushless but I could very well be wrong!! The X2 motor replacement can also be purchased from ArcEuro for £70:
http://www.arceurotrade.co.uk/Catalogue/Machine-Spares/X2-Mini-Mill-Spares

Chris

 
jim:
thank you for the replies

i'm looking to convert to belt drive and figure change the motor if i'm going to do it. the wonderful plasic gear went last year and i see it as a weak point.

the motor is a brushed motor and may be on its way out. Its running half as fast in reverse. ie max speed in low gear is 1350 forwards and 800 in reverse.

if i buy a DC brushless motor would my control (for a brushed DC motor) be ok???

like i say, i've not got a great understanding of electricity!!
John Stevenson:
Running at half speed in reverse is standard on these, why I don't know but they switch a resistor in for reverse running.

The brushed DC controller will not work with a brushless motor, add to this the brushless controllers are expensive, around £200

John S.
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