topbanner.gif
Login
Username

Password




Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.
Shoutbox
You must login to post a message.

10/17/2021 12:40 PM
Welcome, Ploni

10/15/2021 2:19 AM
merlot85, maycondelpiero and hoeltz, Welcome !

10/14/2021 10:06 AM
Thanks for the addition to the group. Seriously considering building a drum roaster along the lines of oldgrumpus's. Love the design and craftsmanship.

10/14/2021 4:00 AM
Morning, ar3mia ! and... coffee drink

10/12/2021 11:55 AM
Evan Slack and CupOfJoe, Welcome !

In Memory Of Ginny
Donations

Latest Donations
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00
Anonymous - 5.00
Users Online
Guests Online: 11

Members Online: 0

Total Members: 7,361
Newest Member: Ploni

View Thread

Who is here? 1 guest(s)
 Print Thread
Larry Cotton's 'wobble disc' heat gun build
mtbizzle
See here - https://www.youtu...=emb_title
Roast: Kaldi wide, SR800, various other projects
Grind: Niche, Bunnzilla WIP, Commandante
Favorite equipment/approaches: Decent, La Pavoni, iced prismo aeropress (Tom's recipe), Hario switch, Hoffman-style french press
renatoa
The beauty of the simple design... ThumbsUp
Got inspired to try one day this idea using a reversed TO as source of heat. Grin

Wondering why not cooling in the same machine, just cut the power, and let the airflow blow...
lmc
the Harbor Freight heat gun i used does not have a blow only function, so cooling must be done (immediately after roasting) by other means. i use a small screen tray with a fan below.
Brandon
I love this design. It's really clever.
renatoa
The wobble disc is borrowed by others for their own designs... also very elaborated, but not so simple and clean as Larry's.

Koffee Kosmo
I like the Drogo roaster - great design application 👍

KK
I home roast and I like it. Designer of the KKTO
Roaster Build information
https://forum.hom...ad_id=1142

https://docs.goog...lide=id.i0
Blog - http://koffeekosm...gspot.com/

Bezzera Strega, Mazzer Robur Grinder, Pullman Tamper Convex,
(KKTO) Turbo Oven Home Roaster.
CharcoalRoaster
cool

wobble disc very innovative
allenb
Great design and execution!!!

Could this also be equipped with IR lamps on top?
1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana
CharcoalRoaster
Additional question... could the wobble disc be driven/adapted vertically (from the bottom) instead of horizontally (from the side)?
renatoa
... could be, but the agitation will be different, and worse than horizontal.
Will get just a peripheral stir, without the alternate flipping of the layers you have when disc wobbles as in Gene/Larry design.
Also, for vertical case the paddle should match perfectly the same curvature as the bottom, else some layers of beans could stay still in the same place on the bottom for the whole roast process, and get burned more than superior layers.

If you want a vertical placement for the agitator, then rather evaluate an Archimede screw design, as in Nesco.
CharcoalRoaster
Which is actually why I was asking Ren -- my auger design failed miserably as the auger I had wasn't large enough to provide decent agitation even at high speeds (110rpm).
renatoa
You can simulate the vertical design of wobble disk with a pencil stuck in a cardboard disc, fixed at an angle with hot glue, then drop some beans into a cylindrical cup and rotate with fingers.
Not Kansas, definitely...
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Roaster build forced air and agitator Building a Coffee Roaster 9 10/07/2021 2:30 PM
Nostalgia Hot Air Popcorn Popper Build A,B, C Popcorn Popper roasting 4 06/27/2021 6:34 PM
Cyclops - my 1kg drum build Drum Roasters 60 06/23/2021 3:20 AM
Simple fluid-bed roaster attempt: wiring heat element Fluidbed Roaster 4 06/14/2021 7:27 AM
Gas Fired 1 lb Fluidbed Build Fluidbed Roaster 45 05/17/2021 9:08 AM
Homeroasters Association Logo, and all Content, Images, and Icons © 2005-2016 Homeroasters Association - Logos are the property of their respective owners.
Powered by PHP-Fusion Copyright © 2021 PHP-Fusion Inc
Released as free software without warranties under GNU Affero GPL v3
Designed with by NetriX