Rainsford wrote:Chris, isn't there a grave danger of overhyping the rotary pump. In the domestic scene, the vibes must outnumber the rotaries by 100 to 1. Ok one is quieter than the other and costs more and Rotaries have longevity built in, but there are loads of happy vibe customers out there and not that many complaints, considering the volume sold.
From your post, I'd say the opposite: rotaries are in danger of being
underhyped. I'm not going to argue any differences in espresso quality, although IMHO this hasn't been adequately tested (La Cimbali Junior results do not automatically generalize to all HX machines). But even so, once you get into espresso machines costing over $1000, the added value of a rotary is very easy to justify. Every time I use my Vetrano's rotary pump, I'm grateful for its quietness. Remember, you engage the pump for the HX flush, portafilter wiggle, backflushing - not just pulling the shot. With a rotary pump, I can monitor the HX flush by sound alone; this was difficult with a vibe pump. Rotary pumps should also outlast vibe pumps, so in the long run they may actually be a cost saving upgrade.
Just my two cents worth. But I can't imagine ever going back to a vibe pump machine. Rotaries rock!
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John