I fully agree. C3D added additional points of failure that do not need to be there. Often in electrical engineering, the best solution is regarded as the simplest solution as it will have the least points of failure.
The simplest solution here would have just been a properly spec’ed push pull optocoupler for control signal and a low pass filter and transistor/FET for pulling D1 to COM(FWD motion). Nothing more and nothing less.
Get’s stranger and stranger…
Note orientation of 4 pin molex connector - it is properly keyed. Red pin is near zero ohms with the EMI shield plate pad (see black alligator clip). Red wire goes into VFD “gray box” P+ signal.
Sorry I was looking at the wrong cable. SK-w1 red goes to earth ground on my VFD and nothing is connected to P+(You look to be wired the same as me). Yellow goes to L1 and black goes to L2.
For SK-W3, red goes to VF1 which is control signal, green goes to DI1(FWD motion) and yellow goes to COM.
P+ to PB is for a braking resistor that is not installed.
Should have replacement SO5 Controller by this Saturday. Closing the patient up and will share results upon retest. I will add that since expressing my frustration to support, they have escalated within and been very responsive. Fingers crossed this gets resolved so I can get to producing…
Are you getting a new SO5 controller or entire SO5? I just got notice that a new VFD controller board is coming. So now I am confused based on what support told me yesterday 
I got an email today that a new S5 controller was being shipped.
On a side note I did get my compact router and swapped that out and everything worked perfectly!
So I’m curious how this is going to play out for people like me who didn’t buy the spindle at the same time as their machine. I wanted to upgrade eventually, but if people are having this many issues I almost dread even making the purchase.
Just the SO5 controller. Sorry for the ambiguity.
Yeah - all functions beyond VFD on my side were working fine… Seems this was an isolated issue with certain SO5 boards impacting only the VFD controls. Expect C3D will manage the replacements based on who got what…
Best to contact to support and express your concern. From what I understand, the tests expressed by some on this forum re: the VFD control (e.g. ground to black on VFD control connection) may not be indicative of VFD pass/fail (e.g. ground continuity may not be a design requirement).
There seems to be an awareness of a known SO5 controller batch(s) which correlate to the 24k startup / unresponsive control issue. My guess is they are likely backordered on getting replacements and shipping as they come in based on needs.
I’ve moved to the “show me state” at this point and will see if that actually fixes my issue and if the replacement VFD controller was even necessary. I will share my findings here.
That is true, but the 24k startup issue is my issue. I might have been the first to report it even.
Looks like I might have the issue as well 
@n8zwn I am having the same issue as well with the 24k. If I hit the red stop button, it will stop. But that’s it.
If I hit the glowing “enable” button on the bottom, 2 times (so glowing → off → glowing again) it will turn the spindle on to 24k again.
Just curious, but for any of you unfortunate SO5 owners who have the spindle ramping to 24k on SO5 power up issue - if you power on the SO5 and VFD with the cable between the two disconnected, what do you get voltage wise probing red lead to the white wire and black lead to where the white wire would plug into the VFD?
The bottom picture is what I was looking for. What about the same thing but for black wire this time? So red probe to black wire and black probe to where black wire would plug into the VFD?
Wait a second there. For the first picture, the other end of that cable is plugged into the SO5 pro and turned on right? You should be reading about 24V there.
Double check these three probe readings directly from the SO5 controller.
What part of the Show me State you in? I am a Show me State guy as well
LOL - in spirit only… 
Support called, and I am unsure why, but I am still in the waiting for a SO5 controller queue. The other part wasn’t necessary, according to them. So I am getting a new controller board for the VFD but not needed. So still won’t be able to fully use my SO5 pro with the spindle.
I did get an email last night requesting feedback on how I am liking my SO5 Pro 
