Had one today, that too on a day I couldn’t be asked to check. Weighed 18, skipped the practice of not checking the weighed beans, chucked them in and got jammed a half-way through.
First time, I thought must be one of the odd beans playing a trick. I continued to grind; as soon as it happened the second time, I dumped the unground beans on a plate to find a small stone.
- The burrs look fine after removing and examining the set closely.
- A few scuff marks in the chamber
Bottom line - Lessons learnt. Will let Foundry know for their information, though.