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oldgearhead
Senior Member
oldgearhead
Joined: 25 Jan 2010
Posts: 395
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Tue Jun 26, 2012, 9:37pm
Subject: Re: Z&D Update
 

Well this one worked for a few days. Then I pushed it a bit too far and melted some plastic.

oldgearhead: DSC_4037.jpg
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PJK
Senior Member
PJK
Joined: 21 Jan 2002
Posts: 2,318
Location: Shingle Springs CA
Expertise: I love coffee

Espresso: Rancillo Silvia, Tonic...
Grinder: Modified Rocky, Elma side...
Vac Pot: Old Silex
Drip: Melitta BCM 4  +Some old...
Roaster: Hottop, Modified Z&D,...
Posted Sat Jun 30, 2012, 10:59am
Subject: Re: Z&D Update
 

Hi Jim,

I seem to remember this picture and your result from a while back.  It is what is prompting me to want to move the roast heater even closer to the roast chamber.  I am even thinking of putting it on top of the aluminum grate.  I know it seems shocking to put it where it can be touched when it is on (roast chamber removed) but if it is powered and one would touch it the electrical shock would be the least of his problems.

I remember an electric cook-top from when I was  a child. It was old then.  The heating coils were in grooves in a ceramic disc.  They could be touched but the fact that they were glowing red would deter most folks.  That old cook top is also part of my inspiration.

Phil




oldgearhead Said:

Well this one worked for a few days. Then I pushed it a bit too far and melted some plastic.

Posted June 26, 2012 link


 
Philip J. Keleshian
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PJK
Senior Member
PJK
Joined: 21 Jan 2002
Posts: 2,318
Location: Shingle Springs CA
Expertise: I love coffee

Espresso: Rancillo Silvia, Tonic...
Grinder: Modified Rocky, Elma side...
Vac Pot: Old Silex
Drip: Melitta BCM 4  +Some old...
Roaster: Hottop, Modified Z&D,...
Posted Mon Aug 6, 2012, 9:42am
Subject: Re: Z&D Update
 

So far I am really liking this configuration of the Z&D.  I no longer have to be concerned with lack of power.

One small glitch was troubling me.  The motor speed control is done with some sort of phase control feeding the rectifier bridge for the motor.  The glitches from the Harbor Freight box would effect the motor speed as I changed heater power.  I was considering EMI filters on the Harbor Freight box. I then realized that I had receptacles on two different circuits at my coffee bar.  I plugged the cord for the motor and Z&D electronics into one outlet and the Harbor Freight box into the other.  Issue solved!

This fix can be applied to corn popper setups with phase control for the blower and a separate one for the heater.

Phil

 
Philip J. Keleshian
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jsobolewski
Senior Member


Joined: 24 Oct 2013
Posts: 1
Location: Vancouver, WA
Expertise: I like coffee

Posted Thu Oct 24, 2013, 9:58pm
Subject: Re: Z&D Update
 

@PJK Would you be willing to share the details of your current setup with the router speed adapter? I have already modded my nesco to record temperature and next I would like to control the temperature. Thanks.

Joe
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