The inner cone is being driven. There are definitely several grinder projects going on out there with similar ideas......yours looks cool! I am going out of town today but will try and post some more pics shortly.

Jason

Couple of pics of the inner workings....

Jason

Totally stunning, thank you for sharing. The market still eagerly awaits an affordable (as close to $1k as possible) titan class single dosing motorized grinder. I get the impression that you're just doing this for yourself, but figured I would mention that anyway.

Thanks!....I started off doing it for myself....and "justified" it by making a small batch (8-10) to have on hand for a few coffee friends/family ....also in case there was any interest in them. Finishing up the prototype seen in the pics then completing the batch (have all the parts and motors done). Was considering selling them in small quantities....but may lose my ass on them....will need to look into the number$.

Jason

Wow. That looks elegantly simple. With such easy access, it must be super convenient to clean and maintain the burrs.

How precise is burr alignment with your design?

will truly enjoy learning more about this one. looks terrific and appears to be built to bejeezus specs.
when i first glanced at the pics i had a flash of the Z brackets for the foot pegs on my old '70 Norton Commando. i'm sure it leaks considerably less too.
i happily volunteer to be a candidate for Canadian field testing.

Quick reply while on the road. I tried to make everything locate off the same shaft for better alignment. The shaft with the inner burr sits in a ball bearing in the main housing....the same shaft slips in/floats/inserts into another ball bearing (same size) in the outer burr adjustable funnel/burr housing. The only possible misalignment is from any slop between the outer burr and the housing c'bore/recess it sits in.....but I kept the tolerances tight.....I don't believe you could get more than a .010-.015"...which could be tightened up more if needed.. not really sure what is considered acceptable.

Jason

If there is ever a slick looking grinder to match a single group Slayer espresso machine, this is the ONE! Grinder setting slippage if not properly locked is something to look into. Any plans to micrometer the adjustment?

The Slayer machines look amazing....so thanks for the compliment! Currently the custom locking screw/knob has a replaceable Delrin tip to really grab the threads (works well when I've used similar on race car spring platforms to lock them) but I will be testing l to make sure it holds up. I originally went round and round with fixed settings or a way to measure the burr height etc....but it quickly became more complicated and started losing the elegance/simplicity. For everyone that wants fixed settings ...there are just as many or more that want infinite adjustability....I figured I would start with this design as a baseline and see how it works out.

Jason

C6MFG wrote:....I don't believe you could get more than a .010-.015"...which could be tightened up more if needed.. not really sure what is considered acceptable.
Jason

Here's a recent HB thread discussing alignment. Seems like alignment is becoming a hot topic in assessing grinder quality. Some are calling it the next frontier in the pursuit of coffee perfection. I have no expertise in this area. But many in this thread seem to:
How important is grinder's alignment? Is good enough good enough?