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schneider78 wrote:

Hello Community,I am looking for some expert advice on replacing an old Baldor VFD, model INV-0054, used in our Fadal VMC4020 milling machine from the year 2000. We are considering upgrading to a Delta VFD and would appreciate any guidance or recommendations on selecting an appropriate model.

 

Hi PCW,

Sorry I am unfamiliar with the terms that you are using. 

It seems that TTL mode is transistor-transistor logic? Is this the mode the board should be operating in?  Even after the firmware update?

And push-pull means that there is a mosfet or transistor opening the input to ground when the pulse is off/low, correct? I guess this makes sense with a pull up resistor, now sure why they would have one there.. And then obviously high when the pulse is on. I do not know if this is how the Powercore is wired.  Honestly, all I know right now is that there are two wires coming off the ALRT pin from the Powercore, I am assuming one of them needs to be tied to ground and the other is the PWM pin.  I think there is a schematic online I can look at and try to find out. 

If the board can run off the 3.3v straight from the Powercore that would be great, if not I can figure out what I need to change and make a little circuit. Wether thats a push-pull circuit or with a simple pull-down resistor. I can also increase the voltage if I do that..

Thank you.

Best, 
-Dylan

Hello Community,I am looking for some expert advice on replacing an old Baldor VFD, model INV-0054, used in our Fadal VMC4020 milling machine from the year 2000. We are considering upgrading to a Delta VFD and would appreciate any guidance or recommendations on selecting an appropriate model.

Thank you very much, you are very kind, I have been trying to change the configuration for days without success, now it is perfect, we will see how it works in practice.
greetings
Daniel