mackerel that’s good to know.
What sort of adjustments do you use to dial in? I’d are you adjusting down to fractions of a 0.1 marking?
Do you have to adjust rpm to dial in. (Rather than liking to)

    well first of all I adjust the amount of beans. Depending on the kind of beans and the age, I put between 19 and 20.4 grams into my 18 gram basket. After that it’s grind size. The 100% canephora beans last week had to be ground much finer than what I usually use.

    And yes I adjust between .1 markings.

    Rpm can also be used to do fine adjustments.

      simonc yeah that’s the best thing to do as flow control can add variables. Really seems like you got a dodgy unit.

      Out of interest has seasoning the burrs so far improved things at all compared to day 1?

          mackerel cool. I’m keeping dose fixed for now. What time difference does a 0.1 change make for you?

              mackerel that’s very precise. Thank you.
              I think another user earlier said they see about 3 seconds per 0.05 so sounds similar. That is what I’d expect and sounds then very useable.
              Very different to the 20-30 seconds I’m getting per 0.1

              I’ll go back to them again and see if they will replace the unit. Is clearly faulty.

              Also said I’d be happy with a replacement but don’t want to spend another 6 weeks testing and fiddling and having sub optimal coffee for them to decide if it’s working or not. Assuming they even accept this one isn’t.

                  simonc thanks to the details from @mackerel and @Tjyven Kopi have agreed to collect the unit and run a full test on it. Unfortunately due to it effectively being one man company, as Brandon is out the country for a month its going to be a while before I get any answers (so good thing I didn’t sell the Niche as soon as the KD arrived).

                      simonc oh dear - I thought there was more than just one person?

                          MattH more than one in the company but think it’s small and maybe Brando. Is the one responsible still for building and quality control.

                            a month later

                            Brandon is back and my grinder has been looked over.

                            They advised on a small issue where the brass washer was upside down which they corrected, and they also noticed a dent in the bottom wood insert which was a result of my over enthusiastically removing the funnel which came off suddenly and bashed the bottom resulting in said dent. However they have replaced that for me for free which was nice of them.

                            They ran some tests and did see the same large jump in shot times from 0.1 to 0.0 of 15 seconds which I was seeing, and different from @mackerel and @Tjyven . However by relatively small (I think) changes in the RPM they got 3 second differences in time.
                            Test 5 vs Test 7, ie 700rpm and a half notch change in grind size shows only a 3 second difference in time, which doesnt seem to correspond to Test 2 vs Test 3 at only 100rpm more. I am surprised at that, and will definitely be testing when it comes back.

                            For now I assume that 100rpm changes to week the time won’t make significant taste changes and is a different way to adjust the shot times. Thankfully Bean Conqueror measures both so should be able to record and understand how to adjust. And if I want to do more significant playing with rpm, ie 200 vs 1000 for taste from different fines % I can still do so.

                            Its still a magnificently built machine, albeit with some quirks, and the customer service is superb, so hoping this gets me a useable machine for not just espresso generally, but also the types of bean, ie medium to light, and shots, ie long preinfusion pressure profiled with fine grind, that I like.

                            11 days later

                            I’ve just realised that the dosing funnel and the grounds cup have a 20.0 weight difference.
                            Tare scales and weigh beans into the funnel.
                            Grind beans into grounds cup and weigh output.
                            A 20g dose results in scales showing 0.0 to confirm no/minimal retention.

                            Really well thought out detail. No having to tare scales again before grinding( which I forget ) or weigh in pf.