My own designed 3D printed coffee grinder. It has 83mm steel burrs from Fiorenzato, a bean feeder, a 140kv brushless motor and runs on a 4s 30Ah Lithium Ion battery*, grind steps are 8.3 microns!
My own designed 3D printed coffee grinder. It has 83mm steel burrs from Fiorenzato, a bean feeder, a 140kv* brushless motor and runs on a 4s 30Ah Lithium Ion battery**, grind steps are 8.3 microns!
by IonNight
26 Comments
IonNight
I messaged the mods and asked if it was okay to post this long text in a comment under the post and didnt get any answers. So I just go for it.
I designed and printed this grinder in 2.5 weeks in January. I was actually about to buy the Wilfa 200B grinder in the Xmas holidays of 2023, but I was too late for the sale and using 3300 NOK on a grinder didn’t interest me. I would much rather try to make my own, to see how hard it was. After studying how other grinders were made I found a design I liked and made something similar to that. I’ve been using Autodesk Fusion for about 7 years, so the modeling part wasn’t too hard.I mostly use this for Bialetti Venus atm. I want to buy an espresso machine, but there are so many to choose from.
Since the first version of the MK2 was made, I’ve done a few updates. (You can find the MK1 coffee grinder on my Insta. That grinder had really bad burrs)
I upgraded the frame short after to make it more rigid. In late May I added a bean feeder in hopes to run the motor even slower, if the motor runs to slow it will just stop and jam, it need x amount of speed to be able to grind. If it jams, its kinda hard to get it going again. You need to manually turn it to grind/remove the stuck beans.I usually run the feeder anyways so I can prepare the Bialetti with water when its grinding.
In June the output funnel got neodymium magnets for easier cleaning. Other than the magnetic lid for the feeder and the on/off switch on the battery. Its the last upgrades. I dont think its more to do now.
As this machine is a bit complicated and the poor availability of the motor I have decided to not share the files.I am planning though on making a MK3 grinder, with large burrs and s brushed DC motor with a planetary gearbox. If its reliable and is easy to source parts for, I will share the parts on my printables.
Other useful informationThe bean feeder has 4 small 6V N20 motors geared 8:1 (the large red gear) for the feeder screw. I tried 1 motor direct drive, it didn’t work, then I tried 1 motor and 8:1 gear ratio, it didn’t work either, so then I went straight for 4 motors. The motors are powered by a 5V/7A UBEC.
* The brushless motor is rated 140kv, kv is not kV (kilo volt), kv is how fast it spins or rpm/volt.** I use the battery as a PSU as a 15V 27A (the maximum current at 15V) wall PSU is a bit harder to come by. The motor is made for 8s Lipo (max 33.6V), but has no problems running on half voltage.The battery was made from 56x Sanyo 16650 (not 18650) 2200mAh in 4s14p configuration. The cells I got from work when they replaced batteries in laptops.The battery is charged with a computer charger for RC batteries like SkyRC e680.
¤Total price (which includes motor, ESC, burrs, filament, hardware) is around 3000NOK or maybe 350 USD (at the time of writing this, the value of the Norwegian Krone is very low, so the exchange rate is a bit weird and wrong).
Typos can happen, I hope I didnt make any large ones
If you wanna see more stuff, links under. No commercial business stuff in the [links.Youtube](http://links.Youtube), where I recently posted a video on how the grinder works with and without the feeder: [~https://www.youtube.com/@IonNight~](https://www.youtube.com/@IonNight)
Maybe it’s time to start producing coffee grinders and make a small business, idk, just saying.
diagn0z
Any concern of microplastics in your coffee?
Great job, I can only imagine how much time it took you.
h2c4
Kafatek 2.0
Intelligent-Cold8581
This is fucking sicc man. In a world where spending like 1k on a grinder is normal, I like to see someone taking initiative to do stuff by themselve. Thank you for that. If you happen to engineer a MK3 or higher I’d be interested in backing the project!
Chewbacca1324
This is awesome. Great work.
make-install
Great work! Looks great. I like the EG-1-esk design. If you took WW’s “Key” design and integrated it into the EG-1 you’d have something on your hands, The Key is great because of the electromagnetic field is separated far enough from where the coffee gets ground reducing the static-retention that the EG-1 has.
Ever considered dual grind chambers? One conical for coarse breakage, then into your flat burrs?
If I could recommend anything it would be to try and keep the motor itself and it’s magnetic fields away from the grind chambers as much as possible.
How are the results?
Simple_Discussion_41
Great job bro.. I really appreciate things like this. 👍
ThatTysonKid
That’s absolutely incredible. Does it produce actually good coffee? Is it espresso suitable? Does the torque from the motor twist/rip anything apart?
I love the knocker btw. Amazing work.
DoronSheffer
Amazing. Beautiful art piece
AlaricCinderveil
This is something I’m planning to do later this year. I just can’t afford a grinder, plus it would be fun
Patrick_tuning
Wow this is impressive, well done !
TBH, to me the best part is really the bean feeder. Could you provide some info on how it works ?
I mean, if you were to make a bean feeder with let’s say a few adapters for the most common grinders (Sculptor, DF64, P64), I’m pretty sure a lot of people would jump on that train to simplify their workflow using existing grinders.
And I definetly would !
HardCoreLawn
Bro, I thought you were joking until I saw the photos…
Nice one!
**Edit:** Honestly, I think you might want to patent this, make it in steel/ aluminium, and make an indiegogo/ kickstarter to gauge demand. Seriously. Please do this.
RustyNK
I don’t know much about 3D printed items, but I feel like the tolerances would wiggle themselves loose fairly quickly due to it being made of plastic.
GenerallyVerklempt
STL?
codenamedjackal
Did you get inspiration from Dyson? I thought it was a stick vac at first, and it looks extremely cool.
bradass42
Oh man, you can just send the schematics to a CNC company, add a case and boom, you’ve got a marketable grinder. That’s awesome.
930R93
this is why i quit coffee. too many sweats
NotOfTheTimeLords
Wow, you got to the next level. Very nicely done!
Elismom1313
The guy who likely can afford a real grinder (if clear smarts are anything to go by) but does not want to😆
viperquick82
That’s crazy, wow!
Nick_pj
Shut down the sub – this guy wins
PaulFleming75
Quite a feat of engineering!!!!!
Same-Composer-415
Holy crap… ok, so… 1. This is so cool.
2. I have been waiting for someone to design/make/manufacture a slow-feeding devise (like a speed controlled auger dispenser) that i can put on top of my grinder so i dont have to manually slow feed.
I think there’s an (albeit nieche) market for a product like this. Any chance you would be interested in working on something like this?
PhilsLobWedge
Reminds me of little tikes and other 90s toys lol in a good way though. This is sick af
26 Comments
I messaged the mods and asked if it was okay to post this long text in a comment under the post and didnt get any answers. So I just go for it.
I designed and printed this grinder in 2.5 weeks in January. I was actually about to buy the Wilfa 200B grinder in the Xmas holidays of 2023, but I was too late for the sale and using 3300 NOK on a grinder didn’t interest me. I would much rather try to make my own, to see how hard it was. After studying how other grinders were made I found a design I liked and made something similar to that. I’ve been using Autodesk Fusion for about 7 years, so the modeling part wasn’t too hard.I mostly use this for Bialetti Venus atm. I want to buy an espresso machine, but there are so many to choose from.
Since the first version of the MK2 was made, I’ve done a few updates. (You can find the MK1 coffee grinder on my Insta. That grinder had really bad burrs)
I upgraded the frame short after to make it more rigid. In late May I added a bean feeder in hopes to run the motor even slower, if the motor runs to slow it will just stop and jam, it need x amount of speed to be able to grind. If it jams, its kinda hard to get it going again. You need to manually turn it to grind/remove the stuck beans.I usually run the feeder anyways so I can prepare the Bialetti with water when its grinding.
In June the output funnel got neodymium magnets for easier cleaning. Other than the magnetic lid for the feeder and the on/off switch on the battery. Its the last upgrades. I dont think its more to do now.
As this machine is a bit complicated and the poor availability of the motor I have decided to not share the files.I am planning though on making a MK3 grinder, with large burrs and s brushed DC motor with a planetary gearbox. If its reliable and is easy to source parts for, I will share the parts on my printables.
Other useful informationThe bean feeder has 4 small 6V N20 motors geared 8:1 (the large red gear) for the feeder screw. I tried 1 motor direct drive, it didn’t work, then I tried 1 motor and 8:1 gear ratio, it didn’t work either, so then I went straight for 4 motors. The motors are powered by a 5V/7A UBEC.
* The brushless motor is rated 140kv, kv is not kV (kilo volt), kv is how fast it spins or rpm/volt.** I use the battery as a PSU as a 15V 27A (the maximum current at 15V) wall PSU is a bit harder to come by. The motor is made for 8s Lipo (max 33.6V), but has no problems running on half voltage.The battery was made from 56x Sanyo 16650 (not 18650) 2200mAh in 4s14p configuration. The cells I got from work when they replaced batteries in laptops.The battery is charged with a computer charger for RC batteries like SkyRC e680.
¤Total price (which includes motor, ESC, burrs, filament, hardware) is around 3000NOK or maybe 350 USD (at the time of writing this, the value of the Norwegian Krone is very low, so the exchange rate is a bit weird and wrong).
Typos can happen, I hope I didnt make any large ones
If you wanna see more stuff, links under. No commercial business stuff in the [links.Youtube](http://links.Youtube), where I recently posted a video on how the grinder works with and without the feeder:
[~https://www.youtube.com/@IonNight~](https://www.youtube.com/@IonNight)
Instagram:
[~https://www.instagram.com/ionnight/~](https://www.instagram.com/ionnight/)
One of the instagram posts is here too with some text next to the photo
[https://imgur.com/a/P2Sv0RS](https://imgur.com/a/P2Sv0RS)
Printables (all free to download models):
[~https://www.printables.com/@IonNight/models~](https://www.printables.com/@IonNight/models)
Maybe it’s time to start producing coffee grinders and make a small business, idk, just saying.
Any concern of microplastics in your coffee?
Great job, I can only imagine how much time it took you.
Kafatek 2.0
This is fucking sicc man. In a world where spending like 1k on a grinder is normal, I like to see someone taking initiative to do stuff by themselve. Thank you for that. If you happen to engineer a MK3 or higher I’d be interested in backing the project!
This is awesome. Great work.
Great work! Looks great. I like the EG-1-esk design. If you took WW’s “Key” design and integrated it into the EG-1 you’d have something on your hands, The Key is great because of the electromagnetic field is separated far enough from where the coffee gets ground reducing the static-retention that the EG-1 has.
Ever considered dual grind chambers? One conical for coarse breakage, then into your flat burrs?
If I could recommend anything it would be to try and keep the motor itself and it’s magnetic fields away from the grind chambers as much as possible.
How are the results?
Great job bro.. I really appreciate things like this. 👍
That’s absolutely incredible. Does it produce actually good coffee? Is it espresso suitable? Does the torque from the motor twist/rip anything apart?
I love the knocker btw. Amazing work.
Amazing. Beautiful art piece
This is something I’m planning to do later this year. I just can’t afford a grinder, plus it would be fun
Wow this is impressive, well done !
TBH, to me the best part is really the bean feeder. Could you provide some info on how it works ?
I mean, if you were to make a bean feeder with let’s say a few adapters for the most common grinders (Sculptor, DF64, P64), I’m pretty sure a lot of people would jump on that train to simplify their workflow using existing grinders.
And I definetly would !
Bro, I thought you were joking until I saw the photos…
Nice one!
**Edit:** Honestly, I think you might want to patent this, make it in steel/ aluminium, and make an indiegogo/ kickstarter to gauge demand. Seriously. Please do this.
I don’t know much about 3D printed items, but I feel like the tolerances would wiggle themselves loose fairly quickly due to it being made of plastic.
STL?
Did you get inspiration from Dyson? I thought it was a stick vac at first, and it looks extremely cool.
Oh man, you can just send the schematics to a CNC company, add a case and boom, you’ve got a marketable grinder. That’s awesome.
this is why i quit coffee. too many sweats
Wow, you got to the next level. Very nicely done!
The guy who likely can afford a real grinder (if clear smarts are anything to go by) but does not want to😆
That’s crazy, wow!
Shut down the sub – this guy wins
Quite a feat of engineering!!!!!
Holy crap… ok, so… 1. This is so cool.
2. I have been waiting for someone to design/make/manufacture a slow-feeding devise (like a speed controlled auger dispenser) that i can put on top of my grinder so i dont have to manually slow feed.
I think there’s an (albeit nieche) market for a product like this. Any chance you would be interested in working on something like this?
Reminds me of little tikes and other 90s toys lol in a good way though. This is sick af
Incredible. A+