I developed a cart mounting for my Bullet.
My goals for this cart:
To have a ‘Clean’ setup.
Be able to run the bullet without the chaff screen filter in the chaff collector so that the air flow through the Bullet would not be impacted by a clogged filter and I can run back-to-back roasts without making any ‘on-the-fly’ adjustments to the roast.
Not clean out the chaff and fan components as often.
Have no smoke from the roaster exhausted into the garage.
Be able to roll the cart out of the way when not in use and have a small footprint.
Basic description of my modifications:
I removed the screen filter, and the chaff passes through the Exhaust fan and is drawn through a cyclone filter where 99% of the chaff is trapped. I am using a Shop Vac to pull the chaff, steam, and smoke through a funnel above the exhaust port. I am controlling the speed of the Shop Vac with a Router speed controller. I run the speed controller at ~40% during the roasting cycle and take it up to 100% during the cooling phase after dropping the beans into the cooling bowl. The installation of the speed controller was very easy. Plug the speed controller into the wall and then plug the shop vac into the speed controller. The speed is then controlled by a rheostat.
I printed a baffle to go inside of the chaff collector housing to keep the chaff from filling up the bottom of the collector.
The baffle is the red part.
I may have to design a new baffle. A few flakes of chaff puff out occasionally from some chaff that collects in the nooks and crannies.
I printed most of the fittings for this setup.
I made a new bucket for the Cyclone DustTopper that I bought from Home Depot by cutting a white bucket in half and then printing a new bottom for it and gluing it in place with silicone caulk. I needed the cyclone to be shorter.
It is hard to tell from the photo, but the chaff is around 2.5 inches deep in the middle of the bottom of the bucket. That is the chaff from ~10 kilos of roasted beans. most of the roasts were Naturals with heavy chaff.
None of the chaff made it out of the cyclone filter into the shop vac
I expect that I should be able to roast 100 kilos before emptying the Cyclone filter.
I mounted a touch screen tablet on an articulating arm so that I can move it out of the way for storing.
Here is a photo of the exhaust fan after roasting 10 kilos.
I have a 2.5 inch diameter hose for the exhasut from the shop vac which I am currently just running under the garaqe door.
I will drill a hole in the wall and put a quick connect fitting for the exhaust hose.
There was no smoke in the garage.
The only downside is that this setup is a little loud when running the shop vac at 100% during the cooling cycle after dropping the roasted beans into the cooling bowl.
The last test that I ran was to roast six 750g roasts, back-to-back without stopping to clean anything. That test went very smoothly.
I think that this could be a great setup for doing commercial roasting.