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Topic: Behmor chaff collector mod (9 msgs / 334 lines)
1) From: Benjamin VerHage
I finally got around to modifying my Behmor chaff collector by cutting a sm=
all window and folding it down to help in viewing the beans. I roasted for =
the first time with it last night and it definitely helps visually. I also =
noticed that I can get a lot better readings with my IR thermometer now. =
The difference between readings through the new window and the side wit=
hout a window was huge. Without the hole I always got the same temp (it was=
 probbaly reading the temp of the chaff collector). With the new hole I can=
 watch the temperature rise as the roast progresses. Next roast I will keep=
 a log of temp vs. time to see how it looks.
Ben
      =
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2) From: Seth Grandeau
Now the question is, are you getting the drum or the coffee?  And, for that
matter, is there a difference between the two.
On 8/13/08, Benjamin VerHage  wrote:
<Snip>
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3) From: Robert Yoder
Ben,
 
Where did you make the cut for your window?  I would also like to make IR thermometer readings.
 
robert > Date: Wed, 13 Aug 2008 16:33:49 -0700> From: benjaminverhage> To: homeroast> Subject: [Homeroast] Behmor chaff collector mod> > I finally got around to modifying my Behmor chaff collector by cutting a small window and folding it down to help in viewing the beans. I roasted for the first time with it last night and it definitely helps visually. I also noticed that I can get a lot better readings with my IR thermometer now. The difference between readings through the new window and the side without a window was huge. Without the hole I always got the same temp (it was probbaly reading the temp of the chaff collector). With the new hole I can watch the temperature rise as the roast progresses. Next roast I will keep a log of temp vs. time to see how it looks.> Ben> > > >> Homeroast mailing list> Homeroast>http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Your PC, mobile phone, and online services work together like never before.http://clk.atdmt.com/MRT/go/108587394/direct/01/Homeroast mailing list">http://lists.sweetmariascoffee.com/listinfo.cgi/home roast-sweetmariascoffee.com> Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Your PC, mobile phone, and online services work together like never before.http://clk.atdmt.com/MRT/go/108587394/direct/01/Homeroast mailing list
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4) From: Edward Rasmussen
Actually, you are reading the temperature of the glass.  IR waves do not pa=
ss through glass.  The higher readings you are getting now indicate that mo=
re heat is getting to and heating the glass since it is no longer being blo=
cked by the metal screen that you removed.
You can notice this same effect when sitting in front of a blazing fireplac=
e.  When you slide the metal spark screen into position between you and the=
 fire, you'll feel a considerable reduction in the radiant heat reaching yo=
ur skin.
You can also see the effect of glass blocking IR waves if you live in the N=
orthern climes and aim your IR thermometer at a glass window pane when you'=
re in a warm house and it's 20 below outside.  You'll get a reading near th=
e temperature of the house that you're in.  Now go outside and read the sam=
e pane of glass.  Quite a bit colder.
Ed

5) From: Benjamin VerHage
I didn't know that IR doesn't read through glass. It makes sense that more heat is reaching the glass where the chaff collector hole is located. Thanks for the info. I'm still going to log some readings during my next roast just cuz I'm curious.
----- Original Message ----
From: Edward Rasmussen 
To: homeroast
Sent: Thursday, August 14, 2008 4:59:54 PM
Subject: Re: [Homeroast] Behmor chaff collector mod
Actually, you are reading the temperature of the glass.  IR waves do not pass through glass.  The higher readings you are getting now indicate that more heat is getting to and heating the glass since it is no longer being blocked by the metal screen that you removed.
You can notice this same effect when sitting in front of a blazing fireplace.  When you slide the metal spark screen into position between you and the fire, you'll feel a considerable reduction in the radiant heat reaching your skin.
You can also see the effect of glass blocking IR waves if you live in the Northern climes and aim your IR thermometer at a glass window pane when you're in a warm house and it's 20 below outside.  You'll get a reading near the temperature of the house that you're in.  Now go outside and read the same pane of glass.  Quite a bit colder.
Ed

6) From: Benjamin VerHage
I followed the instructions posted here:http://southcoastcoffeeroaster.blogspot.com/2008/01/window-to-roast-behmor-modification.htmlThe actual measurements don't give you a hole like the one pictured as it is not to scale. I marked out those measurements on my collector and then ended up cutting a little bit higher/closer to the top...maybe another half inch or so. I found a cutoff wheel on my Dremel worked well, and you can follow the holes for a straight line!
----- Original Message ----
From: Robert Yoder 
To: homeroast
Sent: Thursday, August 14, 2008 12:51:05 PM
Subject: Re: [Homeroast] Behmor chaff collector mod
Ben,
Where did you make the cut for your window?  I would also like to make IR thermometer readings.
robert > Date: Wed, 13 Aug 2008 16:33:49 -0700> From: benjaminverhage> To: homeroast> Subject: [Homeroast] Behmor chaff collector mod> > I finally got around to modifying my Behmor chaff collector by cutting a small window and folding it down to help in viewing the beans. I roasted for the first time with it last night and it definitely helps visually. I also noticed that I can get a lot better readings with my IR thermometer now. The difference between readings through the new window and the side without a window was huge. Without the hole I always got the same temp (it was probbaly reading the temp of the chaff collector). With the new hole I can watch the temperature rise as the roast progresses. Next roast I will keep a log of temp vs. time to see how it looks.> Ben> > > >> Homeroast mailing list> Homeroast>
http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Your PC, mobile phone, and online services work together like never before.http://clk.atdmt.com/MRT/go/108587394/direct/01/Homeroast mailing list">http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.com> Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Your PC, mobile phone, and online services work together like never before.http://clk.atdmt.com/MRT/go/108587394/direct/01/Homeroast mailing list
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7) From: Bob Hazen
This entire measurement approach is problematic.  IR thermometers must view 
a non-reflective surface to read accurately.  If the surface is shiny, 
you'll get an amount of reflected energy and not a true representation of 
the measurement target.  The glass, the chaff collector and the drum are 
shiny troublemakers when trying to measure bean temperature.  Not that one 
can do this with beans, but at work when we measure semiconductor case 
temperatures with an IR thermometer we put a blob of white-out or masking 
tape on the part body to avoid errors from reflections.
You can probably read up on this at www.fluke.com
Bob

8) From: Robert Yoder
Thanks, Ben!  That clears things up (sorry).
 
Happy Roast-viewing,
 
robert> Date: Thu, 14 Aug 2008 19:10:45 -0700> From: benjaminverhage> To: homeroast> Subject: Re: [Homeroast] Behmor chaff collector mod> > I followed the instructions posted here:> >http://southcoastcoffeeroaster.blogspot.com/2008/01/window-to-roast-behmor-modification.html>> The actual measurements don't give you a hole like the one pictured as it is not to scale. I marked out those measurements on my collector and then ended up cutting a little bit higher/closer to the top...maybe another half inch or so. I found a cutoff wheel on my Dremel worked well, and you can follow the holes for a straight line!> > > > ----- Original Message ----> From: Robert Yoder > To: homeroast> Sent: Thursday, August 14, 2008 12:51:05 PM> Subject: Re: [Homeroast] Behmor chaff collector mod> > > Ben,> > Where did you make the cut for your window? I would also like to make IR thermometer readings.> > robe
 rt > Date: Wed, 13 Aug 2008 16:33:49 -0700> From: benjaminverhage> To: homeroast> Subject: [Homeroast] Behmor chaff collector mod> > I finally got around to modifying my Behmor chaff collector by cutting a small window and folding it down to help in viewing the beans. I roasted for the first time with it last night and it definitely helps visually. I also noticed that I can get a lot better readings with my IR thermometer now. The difference between readings through the new window and the side without a window was huge. Without the hole I always got the same temp (it was probbaly reading the temp of the chaff collector). With the new hole I can watch the temperature rise as the roast progresses. Next roast I will keep a log of temp vs. time to see how it looks.> Ben> > > >> Homeroast mailing list> Homeroast>>http://lists.sweetmariascoffee.com/listinfo.cgi/home>
 roast-sweetmariascoffee.com> Homeroast community pictures -upload yours!) :http://clk.atdmt.com/MRT/go/108587394/direct/01/>>Homeroast mailing list> Homeroast>http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.com>Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20>> > > >> Homeroast mailing list> Homeroast>http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.com>Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Get ideas on sharing photos from people like you.  Find new ways to share.http://www.windowslive.com/explore/photogallery/posts?ocidT_TAGLM_WL_Photo_Gallery_082008Homeroast mailing list">http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20>>Your PC, mobile phone, and online services work together like never before.>http://clk.atdmt.com/MRT/go/108587394/direct/01/>>Homeroast mailing list> Homeroast>http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.com>Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20>> > > >> Homeroast mailing list> Homeroast>http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee.com>Homeroast community pictures -upload yours!) :http://www.sweetmariascoffee.com/gallery/main.php?g2_itemIdx20Get ideas on sharing photos from people like you.  Find new ways to share.http://www.windowslive.com/explore/photogallery/posts?ocidT_TAGLM_WL_Photo_Gallery_082008Homeroast mailing list
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9) From: Benjamin VerHage
No problem. Happy cutting! I found it to be very helpful. I might do a cut =
more in the middle as well. The light is so bright on the left hand side it=
 almost washes out the beans with too much light.
I did notice when I opened the door to cool my Koratie WP that a lot of cha=
ff came flying out the hole. Placing the vacuum right in front of the hole =
fixed that problem though.
Ben
----- Original Message ----
From: Robert Yoder 
To: homeroast
Sent: Friday, August 15, 2008 12:08:20 PM
Subject: Re: [Homeroast] Behmor chaff collector mod
Thanks, Ben!  That clears things up (sorry).
Happy Roast-viewing,
robert> Date: Thu, 14 Aug 2008 19:10:45 -0700> From: benjaminverhage=
com> To: homeroast> Subject: Re: [Homeroast] Be=
hmor chaff collector mod> > I followed the instructions posted here:> > htt=
p://southcoastcoffeeroaster.blogspot.com/2008/01/window-to-roast-behmor-mod=
ification.html> > The actual measurements don't give you a hole like the on=
e pictured as it is not to scale. I marked out those measurements on my col=
lector and then ended up cutting a little bit higher/closer to the top...ma=
ybe another half inch or so. I found a cutoff wheel on my Dremel worked wel=
l, and you can follow the holes for a straight line!> > > > ----- Original =
Message ----> From: Robert Yoder > To: homeroast=
ists.sweetmariascoffee.com> Sent: Thursday, August 14, 2008 12:51:05 PM> Su=
bject: Re: [Homeroast] Behmor chaff collector mod> > > Ben,> > Where did yo=
u make the cut for your window? I would also like to make IR
 thermometer readings.> > robe
rt > Date: Wed, 13 Aug 2008 16:33:49 -0700> From: benjaminverhage=
<Snip>
aff collector mod> > I finally got around to modifying my Behmor chaff coll=
ector by cutting a small window and folding it down to help in viewing the =
beans. I roasted for the first time with it last night and it definitely he=
lps visually. I also noticed that I can get a lot better readings with my I=
R thermometer now. The difference between readings through the new window a=
nd the side without a window was huge. Without the hole I always got the sa=
me temp (it was probbaly reading the temp of the chaff collector). With the=
 new hole I can watch the temperature rise as the roast progresses. Next ro=
ast I will keep a log of temp vs. time to see how it looks.> Ben> > > >=> Homeroast mailing list> Homer=
oast>>
http://lists.sweetmariascoffee.com/listinfo.cgi/home>=
roast-sweetmariascoffee.com> Homeroast community pictures -upload yours!) :=
http://www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820>=>Your PC, mobil=
e phone, and online services work together like never before.>http://clk.a=tdmt.com/MRT/go/108587394/direct/01/>=> Homeroast mailing list> Homeroast> =http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-sweetmariascoffee=.com> Homeroast community pictures -upload yours!) :http://www.sweetmarias=coffee.com/gallery/main.php?g2_itemId=7820> > > > >=> Homeroast mailing list> Homeroast=
riascoffee.com>http://lists.sweetmariascoffee.com/listinfo.cgi/homeroast-s=weetmariascoffee.com> Homeroast community pictures -upload yours!) : http:/=
/www.sweetmariascoffee.com/gallery/main.php?g2_itemId=7820
Get ideas on sharing photos from people like you.  Find new ways to share.http://www.windowslive.com/explore/photogallery/posts?ocid=TXT_TAGLM_WL_P=hoto_Gallery_082008
Homeroast mailing list
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      =
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