Hi! I found this project to be really exciting! Curious about the suitability of using the latest smart coffee gear on an espresso machine with a Rotary pump - any thoughts, experiences or recommendations? Contrary to a vibration pump, Rotary pumps require quite some energy to get started, and therefore might not be suitable for any pressure profiling, unless doing it steplessly, regulating rpms, or...? (It's a 10+ years Rocket Cellini Evoluzione R)
top of page
Please Read
Forum Rules:
You may not post obscene, rude, offensive or threatening comments on the forum.
Do not create a post for the sole purpose of advertising your business OR selling/promoting a product.
Failure to follow the rules Or be a decent human being, may lead to your account being suspended.
The Forum can be joined by anyone & anyone can publish/write a post in the forum.
By using the forum, you acknowledge Schematix is not responsible for what other people post inside the forum.
All information provided on Schematix.co.nz and the forum are intended for educational purposes ONLY.
If you attempt to recreate/replicate anything you’ve seen/read about, you’re doing so at your own risk!
bottom of page
Thanks for the response!
Hello, Its a great question and one that doesn't have a simple yes/no. As you've pointed out, switching vibration pumps on/off rapidly isn't a problem for pre-infusion or pressure profiling.
And I share your thoughts on Rotary pumps requiring more startup energy to 'get-going'. Personally I wouldn't recommend rapid switching of a Rotary pump.
If we step back from this for a moment and consider the Decent DE1PRO machine, it has amazing customizability for pre-infusion and pressure profiling. And I don't think it by coincidence that they used vibration pumps for this reason.
I'm not a huge fan of vibration pumps (although they get the job done). In a future video, I'd like to explore using a stepper motor to drive a rotary vane pump. The benefits are 2 fold, 1. Stepper motors can be rapidly switched. 2. More importantly their speed can be adjusted multiple times per second, which would be highly desirable for pressure profiling.