[Homeroast] Roasters

Rich rich-mail at octoxol.com
Thu May 20 12:30:03 CDT 2010


The surge suppressor starts to clamp at 200v or so and that renders it 
mostly useless for very short duration spikes of low amplitude.  This 
device will do it for you though.  http://brickwall.com/

Mike Chester wrote:
> A Variac does nothing to remove spikes.  It simply supplies a steady 
> rate change to whatever is put in.  The output can, for example, be set 
> at 110% so if you have only 100 volts in, you will get 110 volts out, 
> but if the input spikes to say 130 volts, the output will spike to 143 
> volts. (110%) To remove spikes you need at least a surge suppressor.  A 
> line conditioner would be optimal, but they are quite expensive.  For 
> the EEs out there, this is a simplified explanation. I know that the 
> autotransformer does supply a slight inductance filtering, but at line 
> frequency it is negligible.
> 
> Mike Chester
> 
> --------------------------------------------------
> From: "Barry Luterman" <lutermanb at gmail.com>
> Sent: Wednesday, May 19, 2010 2:23 PM
> To: "A list to discuss home coffee roasting. There are rules for this 
> list,available at http://www.sweetmarias.com/maillistinfo.html" 
> <homeroast at lists.sweetmariascoffee.com>
> Subject: Re: [Homeroast] Roasters
> 
>> My first thought is the electricity in your home. That is, that you get a
>> lot of power spikes which are taking down your small appliances. If so 
>> you
>> may have to add a Variac to your roasting equipment/
>>
>> On Wed, May 19, 2010 at 8:13 AM, <Tomenid at aol.com> wrote:
>>
>>> Why is it that coffee roasters have such lousy heating systems? My first
>>> IRoast had a faulty system that roasted coffee to ash in under 10 
>>> minutes,
>>> the  second worked for a few months, then at eight minutes proceeded to
>>> heat
>>> up to  high levels and burn everything to ash. My first Gene had a 
>>> faulty
>>> thermostat  that again turned beans to ash in a matter of minutes and 
>>> then
>>> melted most of  the machine. Two others went the other direction, 
>>> with the
>>> thermostat failing to  go over 450F. And all of this after cleaning 
>>> after
>>> each
>>> use and relatively minor  use.
>>>
>>> Tom
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> 
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