[Noisebridge-discuss] getting that goddamned mill to work

[Michael Wright]

Yep, it cycle one way when going forward, then the other when going  
backward.  It also maintains it's pin state indefinitely when not  
moving.  It turned out that all the original (down to 0.001") jog  
sizes were a factor of four, so it would do a full encoder cycle,  
ending with the original state.

Halscope and halmeter are somewhat clunky, but really useful for  
seeing what's going on.

Though we don't actually need the timing to be perfect (because we're  
doing quadrature rather than pulses) EMC2 will still throw an annoying  
error any time the latency crosses the set threshold (max of about  
double the default),   It looks to me like we've got a path to success  
with EMC2 so if the box at Weird Stuff (1.8 ghz celeron) passes the  
latency test I'll just give them $80 for it so we can move on to the  
next problem (how to make parts via gcode).

I am planning to be up there tonight and am hopeful we can actually  
drive the mill from EMC2.

mike

On Oct 5, 2009, at 10:12 AM, Jonathan Foote wrote:

> Mike, that's fantastic, you'll have to show me how you worked that
> out. The relative phase changes with direction, right?
>
> dpc, thanks for the offer!  Without actually having measured it, I'm
> sure that's a 5mm jack. There are at least three other thinkpads in
> the pile so if you have more I'm sure they would come in handy.
>
> I'll be back tonight to bang on things. I think we are close. And
> there's gcode for a Noisebridge logo on the wiki!
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