I decided I wasn't getting the all the response I'd like to see out of the motors on my home-made router, so I replaced the 50 volt supply with an 80 volt one. Everything seemed to go okay; the steppers (powered by G201 drives) were zipping along nicely when jogged, and the one servo on the heavy-duty 4th axis (powered by a G320) was cranking along happily when BANG! - that magic smoke (that makes all electronic devices run) started pouring out of the control box.
It turned out to be a capacitor blowing up on the G320; I'd used a small 470mh cap plugged into the Gecko, and for some reason it took this opportunity to kick the bucket. I'm left wondering what went wrong, and how to fix it. The servo (an Ametek) was marked "40v nominal" so it could be that it just didn't like 80v (although the motor itself never got hot). I'm wondering if I need to swap out the motor for something else, or if substituting a bigger capacitor would solve the problem. One thought was that I might need a different current-limiting resistor. Or maybe this was just a coincidence, since the caps aren't exactly new, and I wondered if simply replacing it with another one would work. I'm also not sure if the drive is toasted or not - the fuse seemed unaffected. Any words of wisdom would be appreciated...