STL files: www.hangbar3d.com/other-projects Cost details: Must have parts: DC motor - 16 USD Planetary Gearbox - 13.6 USD AC to DC 24V 10A power supply - ~27 USD 3D printing of housing + Miscellaneous - ~ 15 USD Shipping - 20 USD Total - 91.6 USD Engineering curiosity / nice to have: PCB - 40 USD 3D printed metal parts - 23 USD Total - 63 USD If we only used the "Must have", it would've cost us ~92 USD. A comparable off the shelf product, which costs €109,95 (~116 USD) is the "Electro Solo" by Hario: www.hario-europe.com/products/electro-solo-portable-electric-grinder Shipping ~ 25 USD. Still not the best financial decision :)
Call me stupid, but i would wager that seeting the gear box ratio in such a way that the grinder makes 1rpm could help with cup quality. Lots of tests suggest that lower rpm makes less fines and more clarity. Thats especially good for filter/pourover and modern espresso There is a very expensive commandante c40 motor kit for like almost 300bucks. But the low rpm really made excellent shots
No need for name calling :). I chose the speed to be as fast as possible without hurting the ground coffee's quality based on the following video: ua-cam.com/video/DKQ6veaTmv8/v-deo.htmlsi=nWw2kBimcjNmLaOc It took me around 3 minutes to manually grind a Tbsp of coffee at ~120[RPM] (2 revolutions per second), so 1[RPM] would be insanely slow.
@matanpazi3777 Oh, in that case, it makes sense. Lance hedricks video suggested that the 1rpm mode a very clean cup compared to the 300rpm or so 3 minutes seems like a lot. How many grams is that? The 1zpresso JE-plus, for example, does 14g espress fine in like 45sec For me, personally waiting 4-5min is okay for the occasional "special" coffee with that extra care. After all, i wait a bit for the espresso machkne and portafilter to warm up. Might as well let the grinder do its best
So, what was the total cost (not including the value of your and Barak's time, but including the Hario, the prototype prints, etc.)? Could you have bought a decent powered grinder for the same amount or are you still ahead?
@@dimitrikatsaros9212 Of course. But I need a 24V 10A AC to DC power supply which is quite expensive. I'll try to get one someday, not exactly urgent :)
very nice
The entire process.... such a GRIND!
Touché
Love it!
I need one too!
STL files:
www.hangbar3d.com/other-projects
Cost details:
Must have parts:
DC motor - 16 USD
Planetary Gearbox - 13.6 USD
AC to DC 24V 10A power supply - ~27 USD
3D printing of housing + Miscellaneous - ~ 15 USD
Shipping - 20 USD
Total - 91.6 USD
Engineering curiosity / nice to have:
PCB - 40 USD
3D printed metal parts - 23 USD
Total - 63 USD
If we only used the "Must have", it would've cost us ~92 USD.
A comparable off the shelf product, which costs €109,95 (~116 USD) is the "Electro Solo" by Hario:
www.hario-europe.com/products/electro-solo-portable-electric-grinder
Shipping ~ 25 USD.
Still not the best financial decision :)
Call me stupid, but i would wager that seeting the gear box ratio in such a way that the grinder makes 1rpm could help with cup quality. Lots of tests suggest that lower rpm makes less fines and more clarity. Thats especially good for filter/pourover and modern espresso
There is a very expensive commandante c40 motor kit for like almost 300bucks. But the low rpm really made excellent shots
No need for name calling :).
I chose the speed to be as fast as possible without hurting the ground coffee's quality based on the following video:
ua-cam.com/video/DKQ6veaTmv8/v-deo.htmlsi=nWw2kBimcjNmLaOc
It took me around 3 minutes to manually grind a Tbsp of coffee at ~120[RPM] (2 revolutions per second), so 1[RPM] would be insanely slow.
@matanpazi3777 Oh, in that case, it makes sense. Lance hedricks video suggested that the 1rpm mode a very clean cup compared to the 300rpm or so
3 minutes seems like a lot. How many grams is that? The 1zpresso JE-plus, for example, does 14g espress fine in like 45sec
For me, personally waiting 4-5min is okay for the occasional "special" coffee with that extra care. After all, i wait a bit for the espresso machkne and portafilter to warm up. Might as well let the grinder do its best
Is there anyway your friend would share the stl files? I'm trying to do the same to my Hario. Thanks!
I'll ask him about it, will update you when I have the answer.
Added link in the description.
So, what was the total cost (not including the value of your and Barak's time, but including the Hario, the prototype prints, etc.)? Could you have bought a decent powered grinder for the same amount or are you still ahead?
Good question. I'll pin a comment with the cost details + comparison to a comparable off the shelf product.
@@matanpazi3777 Thank you! As for supplying it with power for daily use, couldn't you use an AC adapter to get the voltage you need?
@@dimitrikatsaros9212 Of course.
But I need a 24V 10A AC to DC power supply which is quite expensive.
I'll try to get one someday, not exactly urgent :)