Not a member yet?
Click here to register.

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

· 07/04/2020 10:27 AM
Happy 4th of July! jazzyhands

· 06/24/2020 7:58 AM
@Mark McCornack, Please post your question in the forum.

Mark McCornack
· 06/15/2020 9:28 PM
Hi! Looking for a legacy inlet temp sensor on 13 yr old Gene Cafe. It seems they've changed it and now you need new mother board and new sensor. Any ideas where I can find compatibile old one? Mark

· 06/09/2020 6:39 PM
Wich thermometers Can i buy for my roasting machine compatible with usb or macbook?

· 06/05/2020 5:38 PM
peveleth, It is better if you start a post in the forum with your question. These shouts go away in time.

Users Online
Guests Online: 7

Members Online: 0

Total Members: 6,633
Newest Member: houstonroaster
In Memory Of Ginny

Latest Donations
Anonymous - 5.00
Anonymous - 5.00
renatoa - 2.00
JitterzZ - 2.01
renatoa - 2.00

View Thread

Who is here? 1 guest(s)
 Print Thread
New air pump time, two vs one stage and how big a motor?
Hey guys, My current roaster is running on an old leaf blower motor, Sadly the blower is only good for about 250gram load. it worked well in early testing... But once modified and mounted into the chamber it lost some of its punch. The motor mounts in a false bottom pressurizing the top of the chamber and thus into the heat tube.

Looking at the Ametek Lamb line from Grainger. I see some people have luck with the single stage but I'm thinking a two stage might be better suited? the roaster is 2" heat pipe with a 2" heating element and will need to push through the element, the sprouting bed and a second screen under the sprouting bed for my bean dump chute. There seems to be about 14 blowers that match this search.... Any help narrowing it down would be awesome from someone who has worked with these things. A flat bottom would be helpful for mounting but getting info past the Grainger search is tedious.

14 pump search:

The bean dump I'm working on uses a lateral wye with a diverter screen and a manual gate valve.
Elfmaze attached the following image:

Edited by Elfmaze on 02/07/2020 7:36 AM
Part two will be the speed control part. There seem to be many methods of slowing these guys down, But I don't want to damage the motor over time. Cheap 10,000 watt SCR seems to be the cheapest but I also see people using PWM.

I could also run it at full power and use a blowoff valve in the bottom chamber to control flow. Would that be healthier for the pump despite the increased noise?

My heating element is 3500watts and the original goal was a solid 500gram load with some headroom.
Looks like this one is the most powerful of the bunch. Claims 447 "air watts" but at 10.8 amps? That doesn't seem to compute. Villiam was using a 700 Watt blower on his 580 gram tests, but never seemed to get above 50-70% power load.

Edit: Ok "air watts" seems to be something different. I don't seem to understand why some are more expensive than others. one of the most expensive ones is also the lowest power.
Edited by Elfmaze on 02/07/2020 8:19 AM
Jump to Forum:

Similar Threads

Thread Forum Replies Last Post
Bypass or Flow- Thru vacuum motor Fluidbed Roaster 9 07/08/2020 6:21 PM
Mean Time To Failure for FB Elements Electric and Gas Heat Sources 34 02/28/2020 1:30 PM
First time MY FIRST ROASTER 7 02/28/2020 4:31 AM
Upgrade time! GRINDERS 5 02/08/2020 1:06 PM
Cooling tray motor suggestions Drum Roasters 5 12/30/2019 10:53 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 © 2002 - 2020 by Nick Jones.
Released as free software without warranties under GNU Affero GPL v3.
Designed with by NetriX