Hi. I have a chinese K40 with a M2 nano card with optical limits. I replaced the card with a monport card (Green) and installed mechanical limits. The K40 is acting weird. I have changed the Gcode settings in every possible way and i have swope steppermotor + and - and the problem remains. When i give a home command, the gantry moves to the X0,Y0 position.(Top/Back left). When the limits are activated, the gantry starts moving back to the bottom/front right position and slamms into the sides. I have inverted the x and Y direction pins and step pins in all possible positions and no luck. I had monport replace the card also and the problem remains the same. Does anybody have a solution or had the same experience?