Since this was my general "shop update" thread, I guess I should keep up with other changes....
A while back, actually, according to the dates on the pics I'm looking at from when I bought it home, exactly 5 years ago to the day, I bought this retrofitted CNC Bridgeport from
Duc when he was still in AL.
This is right after I got it moved in to my old shop (garage). 3/17/2018
I didn't know a thing about CNC, CAD, CAM outside of the civil CAD stuff I'd occasionally get in to at work. Completely different animal. This sent me down a rabbit hole of days of YouTube videos and eventually I went up to OH and took one of John Saunders' (NYC CNC) 2-day Fusion360 classes. I picked up enough that I was fairly proficient in design and programming.
Fast forward to shortly after I moved to the new place, it started acting up on me. At first I lost the spindle RPM feedback, and then one day while doing some manual CNC, I lost my Z axis servo. I ultimately traced that back to a bad servo drive, which I picked up fairly cheap on ebay, but only after wasting another $150 or so when I fucked up the actual servo that I shouldn't have been messing with at all.
So I get the new drive in and it was trying to work, but still wasn't right. I was afraid the new used drive may also be bad. And then life got in the way and it sat....for the better part of 2 years.
With recent changes in life and career, I'm putting a lot more time in to the shop. I spent a good chunk of last week and the week before troubleshooting this thing.
As it turned out, my drive was, indeed originally bad and the new one was OK, but after doing a whole lot of shuffling between servos, drives between all 3 axis and ruling out that any hardware or cabling was bad, I finally figured out that I had lost and i/o port on the board that was feeding the Z servo. A simple quick edit to the config file and swapping to a spare open port and my z servo was fully functional again.
But then I had a bunch of other weird i/o problems. Knobs weren't working. Config screens weren't showing up right. I was convinced that I had lost a bunch more i/o ports, meaning replacing the $240 main board....which I had already done twice from previous stupidity on my part.
As it turns out, when I was first troubleshooting the bad servo drive 2 years ago, I had reloaded the entire config to make sure I didn't have any weird glitch. And as it turns out,
Duc had given me a nice, full backup of all the machine settings on a flash drive, which I made sure to archive and copy to several places. What I didn't realize is that drive had a couple older versions of the config on it and I inadvertently grabbed and old version that had completely different port assignments on several key functions. So, after reloading the correct config, the machine is back to 100%. After 2 fucking years of downtime.
The good news is that I spent hours probing and tracing wiring in the operator's panel and control box and I have 10x better understanding of how this thing is wired.
Time to start actually running this thing gain.