I checked with Bintel.. and learned something new today
Both Economy models have DC motors.
So I assume you will be able to adjust (with possibly internal pots) the required speed (1rpm.. I will try to ask someone who has that motor driver though).
However, I am not sure how stable this will be - without adequate feedback (PLL, which is not so cheap, and I doubt they are using this in this simple product), DC motor speed is susceptible to variations due to external factors (mainly temperature).
But, it may work for you.