I have the following setup:
- Arduino Uno R3
- CNC Shield v3
- A4498 Stepper Driver w/100 ohm resistors (x2)
- Nema 17HS4401 Stepper Motors (x2)
- 12V-2A Wall Adapter
I set the potentiometer on drivers according the calculations I learned via tutorials. The issue is stepper drivers are over heating (I literally mean, burning like hell). They do not stop but you cannot touch aluminum heat sinks on drivers.
I solved it via connecting a mini fan over the shield but I feel that it is unecessary.
What am I doing wrong?