My first post in my favorite coffee forum, and I'm sorry it has to start with a troubleshooting question.
I recently bought a Macap M7D after eons of research and favorable reviews. I've had it about 2 months, it's had about 10-12 lbs of coffee through it, and was just starting to settle in and deliver consistent grind/weight per dose until a few days ago, when it started jamming unexplainably. Following advice that I found online, I backed the grind off considerably coarser until it ran, but as soon as adjust finer (with grinder running while doing so) when it approaches espresso grind, it jams without fail. On my machine, espresso grind was about 5.5 on the collar, although I know these numbers are not necessarily consistent from machine to machine.
When I first encountered the problem, I took out all the beans and discovered there were beans stuck under each of the "propeller" blades on top of the burrs. When I removed these it ran for a a few days more, then jammed again at an even coarser setting. And of course I never ran the grinder for more than a second while it was jammed to avoid damaging the motor. Has anyone had a similar experience? From what I understand a commercial level grinder like this shouldn't be jamming so easily, so guessing it could be a faulty starter capacitor. I'm also not totally understanding the safety mechanisms built in to the collar, I'm not sure if these could be locking up the burrs or not
I bought the grinder online from espressocoffeeshop, so the warranty/repair procedure is obviously a bit complicated, and I would expect such a process to run at an italian pace - this was the risk in buying internationally that I was well aware of. So before I go down that road I'd love to know if anyone has any advice, for this grinder or for conicals in general, that are behaving this way. The only thing I can imagine is that it's due to the very light use the machine receives (~6 shots a day) and that it hasn't had a chance to settle in fully. I should mention that once it stabilized after about 8 lbs, it was producing wonderful shots with my Lucca, leagues above what I'd achieved with my super jolly. So while I'm a bit disappointed that this is happening, I still believe in the grinder, and the fact that I haven't read one review of this grinder that mentioned faults or quality control issues leads me to think that this this an issue that will eventually be resolved. I have of course written to the dealer and await their response, but if anyone could shed some light on the problem in the meantime I'd be extremely grateful. Below is a link to a very short video that demonstrates the problem.
Thank you all for reading !