[fiddler12]

I'm a new owner of a router table, with all axes set up with paired limit switches. Using just one example, the X axis "home" is found using the limit switch at the -X side. There's another limit switch at the other (+X) end, wired in parallel. The other axes are similar.

Homing works fine, and if I jog into the home switch, after a reset, I can drive in the + direction. The problem is if I run into the + limit switch... it still allows only driving farther into the + direction, no matter what I have tried so far. The only good way to get off the + switch has been to disconnect the switch wire temporarily. Unless there is some setting I've missed, I would put in a pushbutton to temporarily disconnect the limit switch circuit.

Anyone know a Mach3 setting that fixes this? (The override box doesn't help, as far as I can tell).

[lancut]

Look for "Manual limit Override" in left side panel in Mach3 Settings. Good luck.

[ger21]

Are you using a motion controller, or the parallel port?
You should be able to move off of any limit, as Mach3 typically does not know which switch was tripped.

[fiddler12]

The electronics box (supplied with the machine) is connected via USB.

Mach3 doesn't know which limit switch (+ or -) has been tripped on a given axis, but it only allows jogging in one direction (away from the home position) once it has been reset. That's great for one side of the travel, but not for the other side.

The "manual limit override" does not appear functional; it blinks red when a switch is tripped, and clicking it otherwise has no effect. The "automatic limit override" will turn green when I select it, but the machine behaves exactly the same way whether or not this is selected.

One additional oddity: I found in playing around with manually activating the microswitches that if I activate a limit switch (reset button flashes, "limit switch activated" shows), then release the microswitch (reset continues to flash, "limits re-engaged" shows), then hit the microswitch again (reset continues to flash, "home switch activated" shows), then hit the reset button twice, then both directions of travel can be activated with the microswitch tripped. Curious, but of no immediate help.

[ger21]

My guess would be that the chinese motion controller you are using is the culprit.