I have a Dyna Mechtronics DM2800 machine that I am upgrading from proprietary software to Mach3. I have made the connections to the X and Y driver boards as well as the home/limit switches, which was not easy due to first trying to understand the purpose and design of the existing PC boards. Anyway, the stepper motors sound rough and make a growling sound when I jog them. They did not sound like this before so I know something is not set proper even though I am using the same drive boards and wire harness. Please does anyone have an ideas what could cause the motors to run rough with a growling
![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
sound like that?
![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
?? It’s been a long hot day here in Florida and I’m tired, but any help pointing me in the right direction would be appreciated. Thank you.
Fred