Excuse the repost from homeroasters but in case anyone over here is interested, i though i'd share the roaster i made myself today.
Its a (up to) 3kg hot air roaster based on RoasterRob (from homeroasters) design, with a few of my own tweaks.
The roast chamber i've got at the moment is waaaaay too big for what i want. Its probably more of a 3kg+ type of size (150mm square). I'll remake one tomorrow that is more like 100mm square of even smaller.
I'll try to summarise the info that will be of most help to others:
- Folded 2mm mild steel construction (probably would use 1.2mm next time)
- 6mm flanges
- Ametek 119625 2 stage tangential blower
- 7kw Primus burner
- Lathe turned bung to connect the burner through the base plate to a gas line. M8x1.0 male thread one end (for the primus burner), m16 thread on the outside to thread through corresponding m16 hole in base plate and locked off with an m16 nut, and a 1/4" BSP thread on the bottom for the gas connection. This way the burner and burner connection can be fully removed.
- Cheap triac controlled speed controller (doesn't dim enough though, had to add an intake restrictor)
- Silverline 0 - 4 bar pressure regulator
Burner bung (ended up remaking this but didn't take a photo)

Looking down the roast chamber

Finished product:

Beans lofting

Brown!

Prices, models and supplier (probably only handy for fellow aussies)

Solidworks model (and section view)


Youtube video (literally the first time using the roaster, i'm aware of the multiple electrical hazards
)
Hot Air Coffee Roaster - YouTube
Its a (up to) 3kg hot air roaster based on RoasterRob (from homeroasters) design, with a few of my own tweaks.
The roast chamber i've got at the moment is waaaaay too big for what i want. Its probably more of a 3kg+ type of size (150mm square). I'll remake one tomorrow that is more like 100mm square of even smaller.
I'll try to summarise the info that will be of most help to others:
- Folded 2mm mild steel construction (probably would use 1.2mm next time)
- 6mm flanges
- Ametek 119625 2 stage tangential blower
- 7kw Primus burner
- Lathe turned bung to connect the burner through the base plate to a gas line. M8x1.0 male thread one end (for the primus burner), m16 thread on the outside to thread through corresponding m16 hole in base plate and locked off with an m16 nut, and a 1/4" BSP thread on the bottom for the gas connection. This way the burner and burner connection can be fully removed.
- Cheap triac controlled speed controller (doesn't dim enough though, had to add an intake restrictor)
- Silverline 0 - 4 bar pressure regulator
Burner bung (ended up remaking this but didn't take a photo)

Looking down the roast chamber

Finished product:

Beans lofting

Brown!

Prices, models and supplier (probably only handy for fellow aussies)

Solidworks model (and section view)


Youtube video (literally the first time using the roaster, i'm aware of the multiple electrical hazards
)Hot Air Coffee Roaster - YouTube

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