[coffee DIY] how to make a roller coffee roaster

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Because I drink a lot of coffee.

Consciously continue to drink like this

The salary is going to be used for coffee.

I decided to make a drum bean dryer (manual version).

Also made a list and discussion in accordance with the desired conditions.

And then the manuscript is shaped.

The conditions preliminarily discussed are as follows:

The first rolling bean dryer mainly wants beans that can be baked half a pound at a time.

Second, the power output can be done by manual or electric screwdriver.

Third, you can observe the condition of beans at any time.

Fourth, the beans can be baked on the gas stove, or the wheelbase can be adjusted according to different environmental conditions.

Combining the above conditions, the following structure of the bean dryer appears.

After the preliminary structure comes out, draw a draft by hand.

Discuss whether it meets the needs

Let's take a look at the main structure at the beginning.

Four pieces of bean chips are installed inside the main body.

With this structure, the beans will not be squeezed together because of the centrifugal force when the main body rotates.

Picking bean slices can make the beans roll evenly.

Increase heating in all parts

It's not like stir-fried beans in a pan.

Only one side of the bean turns yellow or scorched.

The other side is the case of raw beans.

In addition, there will be covers and openings on both sides of the main body to pick up beans.

After grouping the main structure, other detailed structures will take a look at the photo.

The weight of a single cylinder is 750g.

It's kind of a heavyweight bean baker.

Then make the tube body combination.

The next one is a bean ladle.

After the combination, it was found that the main support was inappropriate.

Because the main structure and the bracket are metal parts to grind.

It does great harm to the main body and the spindle.

So I made some minor changes.

Adjust the bracket to look like the one shown below

I have a draft.

It is about to become an entity.

First add bearings to the iron plate

Remove the part that covers the opening.

Two key points of this transformation

The first one is to use bearings as supports.

The second is that the spindle is changed to full screw teeth.

This design can adjust the wheelbase of the bracket according to the different heating sources.

So I found the iron plate.

Install two small bearings

Let the main frame roll on the bearing

It turns more smoothly.

Let's take a look at what it looks like after a small transformation.

Put the parts together again.

I can only say that I am moved--

Now that the bean dryer has been preliminarily completed

Of course, then there will be baked beans.

First try baking beans with charcoal.

After the bean dryer is set up, let's go idling first.

It can only be said that it is super smooth.

And then it's going to be real.

Bake beans with charcoal!

Roll over-beans-

As a matter of fact, I tried several rounds in a row.

Have been working on the distance between the height of the fire source and the main body of the drum

Too far away from the fire for a long time

If it's too close to the fire, I'll show you.

Get out all afternoon.

Baked three batches of beans

Try to hear the baking degree at the end of an explosion.

And the baking degree at the beginning of the second explosion.

During the whole process, each batch of beans took about 20 murmur50 minutes (always trying to sweat under different conditions)

See if some fine-tuning is needed.

It is mentioned in the book and on the Internet that freshly baked beans should rest for about a week.

So pick out the beans that vary greatly in color in each batch.

Then sort it and save it.

Of course, the baked beans have been sitting still for a week.

You have to come and have a look at the results.

The whole smell of coffee came out.

Penghu Le

Unfortunately, it is very astringent.

The bitter taste is very strong.

Of course, there are many factors that will constitute these two conditions.

This is the first time to experience.

It's nice to have my own bean dryer.

Of course, there are still some insights in the whole process of operation.

Right here to share with you.

When the bean dryer rolls, the silver skin will fly up with the heat source and the small hole in the main body.

Some are stuck at the mouth of the cave.

But the distance closest to the source of fire is burned while rolling.

Due to the bottom heating

It's a pity that all the heat is lost.

After discussion, I felt that a roof could be installed on top of the cylinder.

So that the heat source will not be lost

What's more, the temperature of the main body will not differ too much.

After that, I also used a spider stove to try to bake beans at home.

It went well just as well.

Due to the long distance between the fire source and the cylinder body

Although it takes a long time to bake

But the coffee comes out very evenly.

Finally, share the feeling of rotational speed

In fact, the rolling coffee roaster

After many baking tests

The rotation of the cylinder body only needs to last one lap within 10 seconds of 8 Murray.

Turn slowly

Don't speed up and leave the fire until the smell of coffee beans comes out or when you hear an explosion.

Actually, there are still some doubts about baking?

It is often said in the book that the mastery of the soy bean time or the preheating time of the roaster is not clear enough.

As for curves, we need more information.

Of course, it's an amateur way of baking coffee beans, but this experience is great and fun!

Fall in love with the smell of coffee more and more