I currently have a Velox VR-3636 and the stepper drive BOB has fried. They don't make this model of BOB anymore so I am looking for a replacement BOB or just replacing it all and going with either a G540 or MX4660. A new control box from them is out of my current price range. My steppers are HS2328A. 6.8mH inductance. I would plan to just wire up the G540 or MX4660 in my current box and replace the power supply, connectors, etc with what is needed for either of those.
Pros of the G540
I have about 7 spare G250x drives that could be used in the new G540 if one ever goes out.
Cheaper than the MX4660
Cons
50VDC max input. Quite a bit lower than the recommended for the steppers and their high inductance. Although the current voltage supplied in the box I believe is only 24-28VDC so maybe thats ok?
Fewer inputs although I could wire the limit switches to 1 input to save.
Pros of the MX4660
More inputs and outputs
Higher input VDC rating.
Cons
Pricier
I don't have spare drives.
Thoughts? Thanks in advance.