I'm working on a project where I need a high torque stepper motor. The stepper motor being used is rated at 12 - 24 volts and when I used a 12 volt battery supply composed of 8 AA batteries it appeared to work fine.
Because I wanted higher torque I set the pot on the Easy Driver to 0.5 amps which is within what was recommended for the motor, and used a Lithium Ion battery originally being used for a power drill rated at 18V and 1.5Ah.
When I connected the battery to the easy driver the motor got very hot and would shake when I tried to turn it but not turn. Now the motor will not work with the 8 AA batteries either. Heres a link to the motor US Ship OSM 5:1 Planetary Gearbox Nema 8 Stepper Motor Samll Size High Torque.
What did I do wrong and how can I fix it?
P.S. I am using a photon as the micro controller and the motor is being controlled using the Blynk app I eliminated the chance of it having to do with the photon or Blynk App.
I found out that the battery I'm using is the Makita BL1815 and it is really composed of 2 batteries which are both rated at 15C. I am not sure if C-rating adds or stays the same when you are using two batteries. When I measure the Voltage on the test points I get 4.27V and when using a formula to find current for the Easy Driver I get 0.480A.