[OCNC]

Are there any reasons to avoid using switch mode power supplies with size 23 or 34 stepper motors?

Chris

[BigDaddyG]

Chris,
Switch mode Power Supplies can be used, but you will need a large capacitor across the output terminals. There are specific equations out there that can tell you how big a one to use, but in general, I use a 2000 - 10000 uF capacitor when I use a Switch Mode Supply. But in answer to your question, yes they can be used and used properly, but it is recommended that you use a large capacitor. Hope this helps.
Regards,
Glen