> On Jul 25, 2019, at 2:39 PM, Andy Pugh <bodge...@gmail.com> wrote:
>
>
>
>> 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.
Andy,
Ah, thanks. I do have it backwards. I thought it was M3 is clockwise looking
towards spindle. That would be looking from larger Z to smaller Z in my case.
Apparently I need to fix that at some point and then change all our programs :-(
> I agree that this sounds electrical. Is it a brushless motor?
The motor is a 3-phase Black Max 3HP inverter duty AC induction motor (Marathon
Electric brand bought through Automation Direct) driven by an Automation Direct
VFD (GS2).
-Tom
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