Re: [Emc-users] MESA 8i20 - how to get more juice from it?

[Peter C. W. <pc...@me...>]

On Tue, 24 Sep 2013, propcoder wrote:

> Date: Tue, 24 Sep 2013 22:56:26 +0300
> From: propcoder <mar...@gm...>
> Reply-To: "Enhanced Machine Controller (EMC)"
>     <emc...@li...>
> To: emc...@li...
> Subject: Re: [Emc-users] MESA 8i20 - how to get more juice from it?
> 
> There are so many parameters (instead of 1 actually needed IMO):
> current-minlim, maxlim
> current-scalemax
> nvmaxcurrent
>
> Maybe current-scalemax should be equal to 1?
>
> By the way, neither driver nor motor did not heat as it would at such
> currents as I think..
>
> I don't have such ammeter now, but I will try to get one.
>
> On 2013.09.24 22:46, andy pugh wrote:
>> If the PID maxoutput is 20 then you need to set the scalemax parameter
>> to 20 too, as things are you are only getting 80% of max current.
>>
>> However, that current_should_  be 30A, as that is the nvmaxcurrent.
>>
>> Do you by any chance have a clamp-on ammeter? It would be instructive
>> to see what current you are actually getting.
>

Also you will not get full torque, as a 3.6 KW motor is about 2x too big for 
the 8I20 (16A cont = ~50-60A peak)



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Peter Wallace
Mesa Electronics

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