Slayer espresso shot with the Rocket R NINE ONE - and lesson learned

[@ernieburgos7702]

Very impressive. I liked seeing the great result after your tenacious effort. Cool.

[@weiszCoffee]

Thank you :)

[@Kats072307]

fantastic setup - I love it. Great workflow. I've been looking at the Rocket R9 machines and found your video. Just subscribed to your channel, and looking forward for more content. I am an owner of a Lelit Bianca v3, and a Ceado E6P. Always looking to learn more, because I' m quite new the last 3-4 years in the espresso world. It's such a nice and tasty hobby

[@weiszCoffee]

Wellcome my friend :) Look into my channel, you'll find some more interesting videos

[@paulzarganis]

Thanks for showing how the R9 works. Flow and pressure are just 2 different ways of going about making the extraction. Admittedly controlling flow makes things easier. One thing you should have taken into account is that you shouldn’t calculate pre infusion volume with an empty group head, because you have no resistance. Always do your tests with coffee because puck resistance is what controls flow and pressure. And also puck resistance differs according to grind size, dosage and roast. So a lot of factors you are leaving out.

[@weiszCoffee]

This is a very good point. Planning to do some more tests. They will be with a full basket 🧺

[@pandjichristian7872]

Very informative video! Thank you for this tutorial

[@bertraminc9412]

Oooo Porsche cups! A man following my own heart!

[@78pianist]

Hi David, I have noticed you are using just the water reservoir. Some revievers say that you need the machine plumbed in to get a whole variety of pressures, but it is clear in your video you can use any pressure profile just from the reservoir...???

[@weiszCoffee]

@@78pianist Hi Gregory, this machine can work both on reservoir and plumbed in. It uses a magnetic gear pump that controls the pressure down to the tenth of a bar no matter the water source.

[@knottymatt]

Some confusing stuff here. Glad you got a good result and identified the flow/pressure differences I was about to mention. I'd steer clear of anything but the standard double-shot basket for puck consistency.

[@weiszCoffee]

Thank you :) As for the single basket, I agree that for this particular shot style, a double basket could be easer to work with, but in general I get with the IMS single basket considerably better and consistent shots than any double basket

[@bertraminc9412]

I have a few quetions. I really like the design of the Rocket R Nine. But a large seller here in the USA says it has a lot of problems in general. Do you have any issues with yours? I love the design and advertised features. Also the Caedo grinder... the new Ceado Barista is going to have a few plastic parts up around the adjustment wheel and neck. Does yours have any plastic parts like the adjustment gear and the knob? I don't want cheap plastic on my future grinder. Danke Schön!

[@weiszCoffee]

The Rocket R NINE ONE had a series with a faulty pump. The pump worked perfectly fine but occasionally made a squeaky sound the first 2 seconds of brew. They replaced the faulty pump and now the machine is working flawlessly

[@weiszCoffee]

The Ceado barista is a very nice grinder, but the E37Z hero is a few steps up (also in price) It has no plastic parts and a completely deferent set of burrs with a deferent structure (no screw holes for example) and material which gives it a better grinding capabilities

[@bertraminc9412]

@@weiszCoffee Thank you for that reply. I'll go back to this company and mention it to them. Maybe they didn't know. Also, thanks for the info on the E37Z hero! I had planned on the Rocket Super Fausto but I'll do more research on the E37Z hero! Thanks again!

[@SAW_Coffee]

Great on ya' for nailing the extraction. At 1.5bar, what is the water debit, or the water grouphead flow rate?

[@weiszCoffee]

This machine uses pressure profiling in contrast to the slayer that uses flow profiling. Flow rate is almost impossible to master accurately with a pressure profile mechanism, so I don't measure it

[@SAW_Coffee]

@@weiszCoffee when I change the pump pressure on my Quick Mill, say from 9 bar to 6, I just measure the amount of water grouphead flow, for 10 seconds, divide by 10, and that's the ml/s water grouphead flow rate. I didn't want to change my brew recipes which I developed at 9 bar, so I just set my pump back to 9.

[@nikkonkde]

can you sahre the values in the comments as well? I own a r91 and I would like to replicate this as well. thank you

[@pk-lx2ph]

nice Video… Some questions 😅: - What’s the Endprofile that you „fixed“… - is there a big difference between each coffeetype - has the setting be changed after 24 Hours Thanks for your answer 😊… Peter

[@weiszCoffee]

I increased the pre infusion pressure to 1.5bar to fully saturate the pack at a 25sec time span. Then I proceed to 9bars to begin extraction. Each coffee will taste better at a slightly deferent pressure profile. On a day to day routine I usually use two saved profiles that suites the most Not sure I understand the last question

[@Boutit031]

Nice chemistry set 👌🏾

[@anthonyroth1288]

Any chance that you could do a video that shows how the volumetric parameters of the R Nine One work (ie, if you set up a profile and then use that, where does that volumetric parameter come in?). and how accurate it is (ie, do a shot limited by volume and see how accurate it is base on ml to grams conversation)... thx

[@weiszCoffee]

You can check the following video. Starting at 1:12 mins I use the volumetric to run a shot of 42 grams kzbin.info/www/bejne/mqWmk3x8qM6qZ7c

[@anthonyroth1288]

@@weiszCoffee ok ty. so are you find the the flow meter to be quite accurate on the machine?

[@weiszCoffee]

@@anthonyroth1288 well.. not so much actually. When running without coffee it is quite accurate, but when running with coffee it will depend on the puck resistance. The measurement can be sometimes off by up to 4 grams

[@anthonyroth1288]

@@weiszCoffee thx guess it makes that feature next to worthless - fortunately it’s not an important one…

[@weiszCoffee]

@@anthonyroth1288 not complete worthless. If you set the volumetric with the same coffee amount and type, it should be ok. But I agree that this is not the best feature of the machine and I use it rarely

[@coffeebrat_]

Stick with my flair for a full control of nice long pre infusion

[@american1911]

David, would you recommend the R Nine One now that you have used it for some time or something else?

[@weiszCoffee]

I do believe the R NINE ONE is the overall best machine out there no matter the price, but it does not mean this machine does not have its flaws.. especially with it's gear pump. Seems like there is some kind of a design issue with it, as after some time it tends to squick at the begging of the shot. I already replaced the pump once and now after a bit more than a year, it is starting to squick again

[@iconindexsymbol]

Now you can do a side-by-side comparison of Londinium vs. Slayer for light roast! 😁

[@jammalguiapal6017]

Hi, 25sec for pre infusion then 20seconds for infusion, a total of 45seconds? but why the T2 in the digital screen is around 35seconds?

[@weiszCoffee]

I set the T2 to be a random high number so it will run for the rest of the infusion phase as long as needed. I ended the shot manually on the desired volume

[@jammalguiapal6017]

@@weiszCoffee Hi again, what volume did u achieve for 13grams coffee grounds?

[@weiszCoffee]

@@jammalguiapal6017 I use IMS single basket 7-9gr but prefer dosing 13gr in and 18-22gr out. Amazing results

[@alexandernavratil5318]

Can you share please where I can get the cups because they look awesome

[@weiszCoffee]

Thank you :) You can buy them from here - www.evabaron.co.uk/accesories/3k5uup26htr1pnvbfskh3o8uljex9w

[@alexandernavratil5318]

@@weiszCoffee thanks a lot ! I was a bit shocked about the price

[@weiszCoffee]

@@alexandernavratil5318 Yes it is a bit pricey.. It has real gold on the inside

[@BaristAaron]

Awesome

[@weiszCoffee]

Thanks a lot 😊

[@selahaddingumrukcu]

How is possible on 0.3 bar going fast but at 1.5 bar going slow? Sorry my confusing

[@weiszCoffee]

What do you mean?

[@selahaddingumrukcu]

@@weiszCoffee firstly you arrange 0.3 bar but water can not flow. After changing grind size and some try, water flow faster than expected that i understand if i am wrong please forgive. And then change 1.5 bar and 25 second water flow as fast as expected. That is i mean why at he lower pressure water flows fast.

[@weiszCoffee]

@@selahaddingumrukcu At first I set a 30 seconds pre-infusion with a 0.3bar which is way too low, so than I changed the pre-infusion pressure to 1.5bar and compensated this boost in pressure by lowering the pre time to 25 seconds

[@samuelwijaya1716]

Litle bit of confused...can you share the recipe for the slayer shot.. Thanks

[@weiszCoffee]

As you can see in the video, the recipe depends on the profile type you use (pressure or flow). The recipe for my machine which use pressure profile is 25sec with 1.5bar and then ramp up to 9bars for the rest of the shot. I believe it can be even if gradually ramping up instead of straight jump to 9

[@samuelwijaya1716]

@@weiszCoffee till the end of shot at 9 bar? Or ramp down back to 1.5bar at the end of the shot?

[@samuelwijaya1716]

@@weiszCoffee i'm using presure profile on vbm domobar super digital...more likely as your machine...also using gear pump like your machine

[@weiszCoffee]

@@samuelwijaya1716 If you want to exactly mimic the Slayer profile than 9bars till the end, but ramping slowly down is better

[@weiszCoffee]

@@samuelwijaya1716 Very nice piece of machine

[@Ralfman100]

very nice video and astonishing setup. bravissimo. like and Abo or sure

[@weiszCoffee]

Thank you very much :)

[@digitalazia]

You could achieve great results using the manual control …

[@weiszCoffee]

I agree, but for this shot I needed something with more repeatability

[@yellowwducky]

@@weiszCoffee That is why you can program the shot and just 'store' it no?

[@weiszCoffee]

@@yellowwducky Yes. Exactly

[@gordon2875]

Slayer does pre infusion on 9 bar tho

[@yellowwducky]

But then at that pressure, you better have a very very short shot after cause its going to flow like crazy.

[@chrisp.916]

The Rocket is the poor man's Slayer

[@yellowwducky]

Sadly, the Slayer has to be plumed in so its tricky for a lot of people to even consider, price not withstanding.

[@threehanded8853]

Not sure about all this, but I did it this way: Is it a Cortado or Flat White kzbin.info/www/bejne/iHazaqeXj7CXjaM

[@weiszCoffee]

Very nice video :) Cortado is smaller than a flat white and has much stronger taste due to the light steamed milk and smaller espresso to milk ratio, so actually I agree with you. You made a Cortado

[@vancitycanucks]

Not really the Same. One pressure profiles and the other flow profiles. Meaning the rocket will jump pressure up high no matter what, where the Slayer can stay around 2bar for along preinfusion.

[@weiszCoffee]

I agree. This is why I had to modify the profile to achieve the Slayer flow. Basically it is the other way from what you said. The Rocket uses a magnetic rotary pump that controls the pressure. The Slayer has a needle valve that controls the flow. This means that at the pre phase, the Slayer will have very low flow with 9bars of pressure, whereas the Rocket will straggle with a so low flow, cause it will require a 0.3bars of pressure that is not sufficient to allow the water to saturate the pack

[@facumartz]

this machine is amazing! congrats

[@MrEutuelnoi]

The video is not for newbies. Didn't got a thing out of it.

[@pandjichristian7872]

Very informative video! Thank you for this tutorial