I’m still struggling with this. Yes, I have a spindle (if I ever get to use it). The VFD is a cheaper one that likely won’t last long (Huawong) or something like that.
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VDD is a +5 terminal if you hooked up your 5 volt supply to your BOB, which is sufficient for your signals and limit switches, etc. VDD will be whatever you put on there for a power supply, whether it’s 5 volts or 12 Volts… just be careful that your drivers / switches, etc. Can handle whatever voltage you are putting into the BOB.
And Paul is right about the high / low… I checked my setting and mine are “low” as I have my dir / step -‘s hooked up to pins 2-7, all my positives hooked up to the 5volt VDD terminal
@Robert_Hogstedt I got tired of trying to get Mach4 to work, so I deleted it and installed Mach3. It took forever to get the executable file to work on Windows 10, but after downloading Mach3, the ESS plugin & the Windows 10 fix, I finally was able to bring up the screen. However, whenever I open it, I’ve got to power cycle the ESS. I haven’t gotten the ESS to communicate with Mach3 yet. The folks @ Smooth Stepper haven’t been too much help. One guy was going to connect remotely though team viewer, but either I didn’t do something right or he felt like he didn’t want to help me until next Tuesday. This process is a nightmare for me.
That’s no good. And I sorry, but I have no experience with the ESS board at all, just old fashioned DB25 BOB.
Well. I think I’ve just about got mach3 up to where I had mach4. Except I’m not getting the DROs to move.
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@Robert_Hogstedt Guess What! I finally got movement!
Right On!!! That’s good!
What did you have to do? Was it the pin settings?
@Robert_Hogstedt It was much harder than it should have been.
Well, I switched to Mach3. It was all computer related. At least I’m pretty sure it was. I did change a couple of things, but as for the latest, it was just getting the ESS to communicate with Mach3.
right on… are you getting all three axis to move now?
Now configuring everything on Mach is gonna be a steep learning curve
Not yet. I might hook them up tonight. I don’t know if I want to push my luck though
The speed didn’t look too fast.
Lol! Now it’s the PIA fun part! Make sure your motor config in Mach is set for your Steps/mm or inch, whichever you are using properly… I was using 1800 Micro stepping, when I was actually using 1600. Also, any tweak you do in the motor configuration tab, make sure you hit save ANY change you make, before you go to a different axis or exit out of the motor config settings or it will not save them. I’ve got my mounts made for my limit switches, going to wire up and get them on hopefully tonight, maybe try to get a probe line setup too, then I’ll really focus on seeing what is going on with my machine… I’m not sure if it is properly setup for axis(s) using the Cartesian rule of right hand or not yet as it seems to be moving kind of different…
The speed can be increased in your motor tuning tab… but don’t worry too much about that yet… just make sure all three (four?) motors are moving and in both directions. As far as I can see, you’re not going to be realistically cutting at Mach Chicken if your working with Aluminum and Wood anyways, unless it’s butter soft wood or plastic / foam.
Like I said… I’m learning too 
If anyone else reading these post sees something that we can use or do, for assistance or correction, feel free to say something, be appreciated!
@Robert_Hogstedt Is Amen. I need to figure out the proper power supply for the different parts of my system. I may have just blown a driver.
Uh oh! That’s not good! Hopefully it’s OK…