Good to know.
No, I have not yet bought the power supplies. I have a shed full of those little AC/DC adaptor transformers that power TVs, amplifiers, laptops and a variety of other electrical devices that I thought might be suitable - could be mistaken. I have here for instance a Toshiba N17908, AC 100V, 50-60Hz, 1.5A to DC 19V, 4.74A, or a Simsukian with an output of 9V DC and 1.5A .... would that be a suitable approach, and what Voltage and Amperage parameters should I look for?
By the way, could the Bosch router speed potentiometer be replaced by another devise that can be activated by Mach 3?
So I will be running the steppers in an open loop config, without encoders; should I expect missing step and stalling difficulties and what should I do to minimise or eradicate the chances of these happening?