My desktop mill has been operational for several years in the same configuration with no problem referencing all the axis home or individually. Today when trying to move an axis to home, it overruns the limit switch and keep trying to go. I need to hit stop for the steppers to stop. All three of the limit switches are not operational.
The computer hasn't had internet access for years.
The mill has a Gecko G540. I checked the limit switches at the Gecko input strip and they all complete the circuit when closed (with all power to the Gecko off).
I went to the Mach diagnostics screen and got no inputs lighting up when closing the limit switches manually.
I tried auto setting the limit switches, but the program could not see an input change. It did reference making sure the parallel port was configured correctly in windows (XP). Searching here and I couldn't find any help on that.
I can load g-code and run it. The reason I am trying to fix the limit switch issue is that running a 3D roughing program today, midway through it the mill tried to go off the table in negative X, that got me thinking the setup has lost its place maybe by never having been home.
Question #1 - Did I (operator error) turn off the limit switches?
Question #2 - How do I determine if the parallel printer port is configured correctly?
Question #3 - Some posts talk about setting up a new profile. Would this help?
As a last resort I could change out the G540, but want that to be the last option. It had all worked for quite some time, not a lot of hours.
Steve.