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zamunda wrote:

Hello Renatoa,

These are the accesoires the oven came with:

I do not see the one from your picture.

BTW: I am very new to turbo-ovens, had not used or seen one before I came to this forum.

Koffee Kosmo wrote:

The speed should be approximately 70 rpm
Or if you can’t get that fast with your motor - then go with 4 blades

Re beans stuck under the agitator blade
If you can add an escape slot in the middle of the blade blade that will help

But if you add a spring on the bottom it will eliminate that issue completely

Have a look at the speed and a photo of the agitator with spring on the blog link in my signature below
Or for more speed and agitation tests on my YouTube channel

KK

renatoa wrote:

Who said building a TO based roaster is difficult ?
What other pound sized class roaster can be done so fast, with so little resources/expense?

renatoa wrote:

Nothing about the power management ?
Please, don't ruin this build adding a computer

renatoa wrote:

When you remove lamp shield then you have a significant quota of IR hitting the upper beans directly, as sun rays.
This make the lateral walls heat losses not so critical, but raise another issue: on-off control, using a thermostat is now less desirable.
That's because IR has no thermal inertia, and is not averaged as is convection by air masses permanently in a vortex. When lamp lit at 100%, IR hits at full power, and this could damage the beans if lamp too close, or vertical agitation not optimal, i.e. same beans staying too much on surface.
For this reason, a linear power variator is a better approach for any type of roast where IR quota is comparable with convection.

renatoa wrote:

Yep, 16 Amps is more than enough, 1300W on 230V means a draw in the 6Amps ballpark.
On my machine I never exceed 75% for 250 grams, or 80% for 330g.
The average "profile" is to preheat at about 30%, charge beans, let soak for 1 minute at preheat setting, then ramp about 10% per minute, up to 60-70% at minute 4-5, when dry ends.
Let there about 2-3 minutes, then lower about 5-10% in the 1-2 minutes before FC.
Adjust these figures to have FC about minute 8.

zamunda wrote:

OK, so I connect the TO directly to the power-variator and set/let the thermostat of the TO at max, that is 225C?

renatoa wrote:

Mmmm... not so simple
The motor is preferably to not pass through power variator, the a/c sine wave chopping done by the variator is not pleasing for all motor types.
The variator output should go to the lamp only, and thermostat bypassed.

What solution used for chaff/smoke exhaust ?