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jgood wrote:The prototype looks awesome -- I suspect that the cost of retrofitting that setup is the reason it didn't end up going into production. Perhaps QM will make a machine with that design built in.....
Thanks! I hope you're right.
JmanEspresso wrote:SO.. Is the lever controlling a gear pump?
I appreciate your enthusiasm
but..it's a rotary pump.
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With the profiler on my QM 67, I've found it easiest to back down to minimal pressure rather than to ease up into it. I start the shot with the profiler knob wide open. As soon as the manometer needle twitches from zero, I quickly turn the knob down but not completely off. This lets me get to 1/2-2 bars before a single drop falls and then have a leisurely preinfusion. From there the ramp up can be pretty smooth and controlled.
Could you post a video of that method? I've tried reproducing it but I'm not able to get a great 2 bar preinfusion.
I'm looking for a flow control device for my PP700 and saw that Chris Coffee has gotten these back in stock after a period of unavailability.
Glad I stumbled upon this thread, because it seems like their version (made by QM) isn't as good as the version that WLL sells - at least previous versions of it.
Has anybody had the chance to purchase the latest batch to see if any changes/updates have been made to further restrict the flow near the "closed" position? Or does anyone have any recommendations on where I can source an alternative flow control device? WLL seems to be out with no ETA on when they'll be restocking them.
Thanks everyone and happy happy holidays.
Thanks. It says on the site that they can't ship into the US, though.
Hi Jonathan, I just got one of the recent shipment of Flow Control from Chris' Coffee on my new Alexia. I'm happy to answer any questions. I just wrote a review on the Chris Coffee website. This is my first post here, BTW.
Is the flow rate adjustment still the same as reported here? i.e. a lot of flow comes with ~1/4th a turn?
1/2 = .65ml/sec
3/4 = 2.5ml/sec
1 = 4.75 ml/sec
1 1/4 = 5.5
1 1/2 = 7.5
1 3/4 = 8.25
This is the latest. Installed by Chris Coffee on a new Quick Mill Alexia.
Somewhere between 1/4 and 1/2 turn it starts to activate slightly. I have only had it 2 days. Seems right to me.
sounds like a major improvement in flow control over the turning range of the device