I'm trying to run this stepper motor (1A per phase, 16Ncm) with a battery—I have tried 9V, and two 9V batteries in parallel. I am using a DRV8825 driver.
I realise such a stepper will drain the batteries extremely quickly, but shouldn't it work fine until that point? Wouldn't the batteries provide as much current as was needed and then drop their voltage and die?
I have tried powering the stepper with a variable power supply at 9V and it works fine.
So my questions are:
-What am I not understanding?
-What kind of battery should I be using? (It needs to be handheld—small 12V battery, 8-pack AAs?)
-If this doesn't seem realistic, how much smaller should the stepper be for this to work?
I only need about 30min - 1h of use per charge.
Thank you in advance.