Quote:
Originally posted by redleader
Get a bigger fan. You can probably find surplus 120mm+ fans with very high powered motors if you look hard enough. I know I've seen PDFs for 20w DC fans before.
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True, but they're "low-torque" motors. Pressing it in water will cause it to run much slower, and with less force/torque.
The stepper is starting to look good to me, but would require a controller. It could be tweaked for maximum rpm/torque...