Hi there!
A few days ago I bought my first CNC machine! (:
It is a big F3000 from cnc1 from the year 2005. The deal was so good that I couldn't say no haha
Today I set everything up and tested the machine to the best of my abilities. Then something really weird and unexpected happened... When I left the spindle running und did not touch anything, the machine made random short jerks on a random axis. Most of the time it was in the x direction but I also saw y and z. The time between the jerks appeared to be random and 20 seconds to around to mins apart.
I tried disabling the jog button and even disconnected the keyboard to rule a malfunction there out. I checked the control box and couldn't see any loose wires, obviously that doesn't rule out that the problem is there.
Furthermore it didn't happen when the spindle wasn't running so I guess it must be some kind of interference within the control box?
Another problem could be that there are electricity fluctuations in my garage, the neon lights sometimes turn off randomly...
Any other clues or suggestions for troubleshooting?
Thanks a lot in advance for your help!
Greetings from vienna!

Edit: it's running mach3