Think this is sort of general discussion...
I am developing a secret project (lol). It requires the use of at least 3 stepper motors. I was convinced by a group that works with Rasberry Pi and HMI that I needed an Ingenia HYDRA control for the stepper motor. That was when I was only planning on using 1 stepper motor. That board cost me $350 and I'm told it isn't recommended to use the HYDRA for more than one stepper motor. So 3 HYDRA's = $1000+
The more I research the Rasberry Pi, the more I'm convinced I can control all three steppers without an intermediate control board such as the Ingenia HYDRA.
Anyone have experience with this? I am a mechanical engineer, but just started my Rasberry Pi endeavor. I should also note I am a software developer as well... and have been developing software for the last 12 years full time. The company I'm dealing with wants to do my first prototype from end to end (programming) to speed up my process (Using the Ingenia HYDRA)... but, I think this should be simple enough to do myself.