Sorry, I’m sure this topic has been brought up a bunch but i cant seem to find the exact information I need, whenever I seem to find a link to a question that seems close the URL is broken, so I was just hoping someone could let me know if I’m on the right track here.
I have a S3XXL with a water cooled spindle. I’ve just always wanted to configure it to turn on and off with carbide motion. So far, with the help of what info I have been able to gather, I soldered a connector into the PWM and GND on the board and ran that into to a 5-10V converter (i was told the VFD needs 10v for the spindle to reach full RPM) then from the converter into V1 and ACM on the VFD.
The problem I am having is the 10v converter needs an external 12v power supply which would require a signal from the VFD to make everything automatic. I tried using the onboard FA/FB relay, which works with the manual “run” button on the VFD but when I change PD01 to 1 to accept the M3 command the FA/FB relay wont trigger because it never receives the PWM signal.
I was hoping there was an output on the shapeoko controller that I could use to trigger an external 12v relay with an MS command but from what I’ve read the V2.4e doesn’t have any such thing. So, I’m left thinking my only option is using a low level trigger relay off the PWM signal to power on my PSU which will then turn the converter on so the VFD receives the signal? Before I purchase one of those, are there any easier workarounds? Am I just going about this all wrong?
Does anyone have a working link to the original S3 VFD posts? If found links to them but they’re always broken so I am relying on bits and pieces of information that may or may not apply to my situation.
First, are you positive the your VFD spindle input is 0-10V and cannot be configured to take 0-5V ? Some VFD can, depends on the model.
If it does required 10V PWM input, you may want to use a standalone 5V-10V stepup converter, that does not required any additional/external power, like those cheap things
Just tune that potentiometer such that you get 10V on the output when you put 5V in the input, then insert that module in series between your PWM output and the input on the VFD, and you should be good to go ?
p.s. here’s an old not-broken link with VFD discussion
I had one of those voltage converters hooked up and working before I realized, like you mentioned, that I didn’t even need it. I just couldn’t get the spindle to turn on and off with the M3/M5 commands but I ended up finding all the info I needed in that exact discussion. You would think info on this subject would be easy to come by but it’s so fragmented that I was led in a couple completely wrong directions. All’s well that ends well though, thanks!