> On 25 Jul 2019, at 18:33, tom-...@bgp.nu wrote:
> 
> Is there a standard or convention on which way M3 and M4 spins a lathe 
> spindle?  Is the direction (CW/CCW) viewed from looking at the spindle face 
> or out FROM the spindle?

M3 is positive in a vector sense. 

Or to write it in English, M3 is clockwise when looking along a line from 
smaller Z to larger. 

I agree that this sounds electrical.  Is it a brushless motor?

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