Not a member yet?
Click here to register.

Forgotten your password?
Request a new one here.

Shoutbox

You must login to post a message.

allenb

11/28/2023 6:38 PM

Waltkurtz

allenb

11/28/2023 11:13 AM

yoshiod9

renatoa

11/28/2023 3:52 AM

, Choppin ?

allenb

11/27/2023 5:52 PM

JHCCoffee

renatoa

11/27/2023 6:46 AM

, Braumeister

Shoutbox Archive

Forum Threads

Newest Threads

Skywalker, the ALM c...
Advice needed for ty...
Wake Up Smart Home C...
Bellwether Roaster
Solid State Relay Qu...

Hottest Threads

Larry Cotton's 'w...	[62]
1lb FB hopper roa...	[33]
Skywalker, the AL...	[30]
Bellwether Roaster	[27]
Apwollo 11 roaste...	[27]

In Memory Of Ginny

Donations

Latest Donations
dmccallum - 10.00
JackH - 25.00
snwcmpr - 10.00
Anonymous - 2.00
Anonymous - 5.00

Users Online

Guests Online: 3

Members Online: 0

Total Members: 8,006
Newest Member: LuvdaLordJesus

Oh no! Where's the JavaScript?
Your Web browser does not have JavaScript enabled or does not support JavaScript. Please enable JavaScript on your Web browser to properly view this Web site,
or upgrade to a Web browser that does support JavaScript; Firefox, Safari, Opera, Chrome or a version of Internet Explorer newer then version 6.

View Thread

Homeroasters - Home Roasting Coffee Community » BUILDING A ROASTER » Electric and Gas Heat Sources

Who is here? 1 guest(s)

Heating Element Failure -- help?
CharcoalRoaster	#1 Posted on 12/08/2020 8:34 AM
1 1/2 Pounder Posts: 638 Joined: April 13, 2012	A lot of bad luck in the garage this weekend -- Glass RC fell to the floor and broke and I am out of coffee! (thought I'd spring for a 12oz bag to get me through the week and repairs = $26! this coffee better be GOLD). Anyway, grabbed some spare parts and rigged up my new build to hopefully just get a roast or two in before totally finishing it up and connecting it to Artisan and TC4. Here's what I ran into... Bigger blower for this new build runs at probably 15-20% with the 500g test load before it blows the beans out of the RC -- no biggie and good news honestly as I'm hoping to be able to get to 1-2kg loads when all is said and done. Hooked up the heater and everything was going swimmingly until heat cut out and I had to pull things apart to figure out what was going on. Discovered my element somehow shorted out or something but I repaired it and reinstalled for another test run. Within 45-90 seconds I noticed temp dropping not rising again. Looked down and one of the connectors had come loose off the element terminal. I cut power, re-connected and switched element back on. Still nothing. Pulled everything apart again and the element (brand new btw) was completely oxidized and had another break in the coil. I can either deduce this is from... (1) Airflow being too low - due to running the vac blower at 15%ish (2) Bad connection with that one terminal connector caused it to overheat and oxidize to the point of failure Any help would be appreciated! CharcoalRoaster attached the following image:


renatoa	#2 Posted on 12/08/2020 10:13 AM
Administrator Posts: 2729 Joined: September 30, 2016	A fan forced to run so low is no good... sensitive to load changes like pressure due to chaff clogging... => a lot of speed variations, thus unstable air temperature. Back to pan roasting then... Edited by renatoa on 12/08/2020 10:27 AM


allenb	#3 Posted on 12/10/2020 11:35 AM
Administrator Posts: 3777 Joined: February 23, 2010	Shoot us some photos of the point of failure 1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana


CharcoalRoaster	#4 Posted on 12/10/2020 2:54 PM
1 1/2 Pounder Posts: 638 Joined: April 13, 2012	Quote allenb wrote: Shoot us some photos of the point of failure Point of failure was along the middle of the coil nowhere near the terminal connectors. The first failure looked almost like an accidental contact point that shorted out and melted the coil in that point of contact. The second failure was in a completely different spot on the coil.


allenb	#5 Posted on 12/10/2020 4:49 PM
Administrator Posts: 3777 Joined: February 23, 2010	I've seen some elements that tended to move about if a particular area had less than minimum needed air passing by it and it would expand enough to cause the area to bow out and touch to ground or touch another coil. Maybe this is happening! 1/2 lb and 1 lb drum, Siemens Sirocco fluidbed, presspot, chemex, cajun biggin brewer from the backwoods of Louisiana


CharcoalRoaster	#6 Posted on 12/10/2020 6:40 PM
1 1/2 Pounder Posts: 638 Joined: April 13, 2012	Quote allenb wrote: I've seen some elements that tended to move about if a particular area had less than minimum needed air passing by it and it would expand enough to cause the area to bow out and touch to ground or touch another coil. Maybe this is happening! Interesting! I would have thought too much airflow would potentially move the coils but not distortion due to lack of airflow. Thanks Allen -- I received a new coil today I'm gonna fit up this weekend

Jump to Forum:

Similar Threads

Thread	Forum	Replies	Last Post
Unable to get Artisan Scope's PID to control heating	Dataloggers/Controllers/Rate of Rise Meters	4	08/01/2023 9:11 AM
No heat suddenly. Problem continues even with swapped heating element.	Gene Cafe Roaster	9	05/01/2023 7:13 PM
Heating elements	Fluidbed Roaster	16	03/21/2023 9:40 AM
1/2 lb - Heat Gun Element - Tc4+ - Fluidbed Roaster	Fluidbed Roaster	22	09/28/2022 8:03 AM
DIY Kanthal A1 heating coil	Heat Gun Roasting	20	06/23/2022 6:24 AM