Probe Placement and Bean Mass Question

[edtbjon]

Thank you for a really excellent video!!!
I hope that you don't mind a few followup suggestions...
That video was shot with a "max" charge. Now, what does a minimum (I'd say that's around 200-225g, so that the TC gives accurate readings.) look like. Maybe something in between too.
Second scenario: Minimum and maximum charge with a 48rpm motor. (Do you have the possibility to do that? It can be as easy as feeding the motor with around 17,5V or so.)
I guess that some videos of these four (six) scenarios would provide lots of answers to a lot of the questions we didn't know that we had.

[beananimal]

Hello Björn,
is already in progress, but it will need until next weekend to bring it into youtube.
But the problems are all solved and now the videos are nice to view (my personal view)

I have videos with 100g, 150g, 250g, 330g, 400g, 500g green beans 72 rpm.
Rosted beans with 400g and 500g are planned for later. Probably then with airflow again.
48 rpm is no problem to switch to.

Frontplate with new foil - quite clear this time




Mounted - with torch installed




Space view




500g static




500g in rotation, as in the video



The beans below climbed through the exhaust hole - in a few seconds of video.

[SusanJoM]

Brilliant work.  Thank you

If/as/when you change to the slow (48 rpm) motor, will you (it would be lovely if you do) also change to a perforated drum?

That would be especially sweet to see since that's my configuration.  I've been trying to decide how to approach changing my roasts to smaller charge weights, and so I'd love to see the difference between 227 and 350 and 400 gm charges.....if/as/when you are so inclined.

[phischmi]

As already said in german KN - great work!

Have you already done the last test with charges of 333 - 400g? Since the Huky has a capacity of 500g and common opinion is to drive a roaster with about 80% of its capacity for optimal results.

Philipp (eistee)

[beananimal]

  It's amazing,
the wish-list grows faster than the work results looks quite familiar to me 

Next version will follow, and should fullfil some wishes, but it will need some time.
You can use the "replay button", the clips are quite short 

Here you go for the current set.

Huky, empty, 72 rpm, solid drum,
with probe +  trier, 2017-01-15
https://youtu.be/H5Iokfm16pc


Huky, 100g, green beans, 72 rpm, solid drum,
with probe + trier, full light, 2017-01-15
https://youtu.be/JKBKOkNMxAU


Huky, 150g, green beans, 72 rpm, solid drum,
with probe + trier, full light, 2017-01-15
https://youtu.be/GzuF1D9mCFk


Huky, 250g, green beans, 72 rpm, solid drum,
with probe + trier, full light, 2017-01-15
https://youtu.be/UkSBaYP9I3s


Huky, 330g, green beans, 72 rpm, solid drum,
with probe + trier, full light, 2017-01-15
https://youtu.be/uyS6Ae6uRoQ


Huky, 400g, green beans, 72 rpm, solid drum,
with probe + trier, semi-light, 2017-01-15
https://youtu.be/LSxxq9Dt7lU


Huky, 500g, green beans, 72 rpm, solid drum,
with probe + trier, semi-light, 2017-01-15
https://youtu.be/TWBXpYsmJ9s

[SusanJoM]

Excellent.

By the way, I don't know what made me suggest that changing to the perforated drum when you change to the slower motor would be of any use at all for what you are showing us in these videos.  I take it back    It will be interesting to see if the slower motor gives the BT probe more immersion when the drum is turning more slowly....

This is a very nice addition to what we know about the HUKY.

Susan

[beananimal]

Brilliant work.  Thank you
If/as/when you change to the slow (48 rpm) motor, will you (it would be lovely if you do) also change to a perforated drum? 
....  to see the difference between 227 and 350 and 400 gm charges.....

Hello Susan. Don't worry about your wish list. My personal wish list is as follows:

- one set without probe (maybe without bean trier) to see the undisturbed bean flow as it is in the middle of  the drum and to decide if the probe should be somewhere else. Or maybe 2  probes necessary for very small and full batches

- one set with reverse rotation (maybe I'll only show the existing 150g - 333g in lower quality).
The current videos pretend that the Huky is very full, but in fact it shuffles a lot to the front plate and at the other end there are really less beans.

- one set with 48 rpm (and perforated drum). Up to now the only reason why I didn't use it is, that the inside color of mine is about midnight-bronce, the patina of ~100 roasts, and it just sucks in all the light.   

- one set with roasted beans, should be larger beans, maybe Columbia.
But before I need to roast two batches to have a 500g batch of roasted beans.
And for this I need a fully assembled Huky 
Furthermore this set I want to perform with airflow, because the Huky will be full to maximum, the beans are from lower density, and the tendency to jump into the exhaust may increase significantly.
And therefore I want to have a clear exhaust pipe with a 30° plate in the elbow - just as the original elbow.

You see, I am willing to fulfil the stereotype of a German engineer, and the long evenings for the rest of the winter are pre-booked. 
But I am confident that the efficiency increases significantly, due to lessons learned, as up to now it was about 30 videos to get 7 useful version.

Anyway I admit that the videos are not very good for a long movie evening. You get quite dizzy after watching some of them.   

[SusanJoM]

I will be very interested to see what it looks like without the trier which I don't ever use. 

At one point I plugged it with a copper cap, but since it still caught beans I removed that and went back to leaving the trier in upside down.  It might be a better idea to replace the trier again and find a better plug.   Hmmmm.....Very very interesting   (way more than what the TV has to offer).

[beananimal]

Just enjoy a bottle of good wine and try the cork for the plug, with a small screw as a handle.
It should be of 19mm diameter and around 35 mm long.
If the cork doesn't fit, try another bottle.  Sooner or later you'll be happy...
... and hopefully the coffee will not taste corky then 

[SusanJoM]

I imagine a modification to the HUKY based on these videos:  an alternative BT thermocouple location.  The current one to be used as usual;  the new one to be used for small loads.  It would be located closer to the wall of the drum, just above the door and would probably be good for the bean mass of 150 gm, 200 gm....

[monkey_lever]

Thanks for sharing your videos. Excellent work.

Is there any way to check how the beans are moving and/or interacting within the drum. By design it seems that most of beans are pushed against the front plate but Im wondering if the beans that are on the back are able to move to the front and vice-versa.

Rgds.

[edtbjon]

Thanks for sharing your videos. Excellent work.

Is there any way to check how the beans are moving and/or interacting within the drum. By design it seems that most of beans are pushed against the front plate but Im wondering if the beans that are on the back are able to move to the front and vice-versa.

Rgds.

The fins inside the drum push the bean-mass towards the front as long as the drum rotates (in the right direction).
Now, there are lots of videos where.beans are moving very slowly in a glass window. But these videos by Peter shows the "naked story". A detailed study of frame-by-frame may give a better answer.

[beananimal]

I imagine a modification to the HUKY based on these videos:  an alternative BT thermocouple location.  The current one to be used as usual;  the new one to be used for small loads.  It would be located closer to the wall of the drum, just above the door and would probably be good for the bean mass of 150 gm, 200 gm....

A long time ago I bent the BT downwards, about 1cm, so that there is still enough space for one large bean to go through, to avoid to much pressure.
A shorter probe would be even more solid and it had the advantage that the blades allow a slightly bigger radius for shorter devices as the open radius increases towards to the front plate.
On the empty drum pictures the space between blades and probe should be "visible"

[SusanJoM]

A long time ago I bent the BT downwards, about 1cm, so that there is still enough space for one large bean to go through, to avoid to much pressure.
A shorter probe would be even more solid and it had the advantage that the blades allow a slightly bigger radius for shorter devices as the open radius increases towards to the front plate.
On the empty drum pictures the space between blades and probe should be "visible"

Do you mean a shorter probe in the current location?
Did you leave your BT bent? 

By the way, all of my corks are too fat for that trier hole, so I've gone back to the copper cap for now...What I'd really like to do is take the trier apart and just use the external part as a plug, but I am guessing that takes tools that I don't have.....

Edit:
Do you think there is a way to mount something like this?
http://www.omega.com/pptst/SA1XL.html

[beananimal]

I left my BT-probe bent. I believe it gives me better readings for small batches. But my temp-curves are not really comparable with other Huky users.

I meant a shorter probe in another position, more downwards, closer to the blades, to have it deeper in the beans and further away from the trier. If it is shorter the forces are lower and the bending stress should reduce by the power of 3 ( length^3)

I made today the set of videos without probe and part-time without trier.
But I still have comment and to upload them.

For the test with airflow I have to redo the exhaust again. The todays version looks nicer, but has even higher local speed due to reduced cross-section and I don't want to create fake-problems.