SignTorch
Artist
A Z limit switch is not absolutely necessary, but it allows us to have Z home and Z zero (in machine coordinates) at the top of Z travel, which allows us to define Z soft limits, which can keep the torch from touching the grating, among other things.
It is a normally closed momentary switch wired between ground and pin 12 on the BOB.
Since we're not using the existing 3 wire Z motor cable, we can use two of those wires, on pins 13 and 14 of the connector. On the other end (I think) those two wires are orange and green (check continuity to verify that).
Note: at some point we will change this to have all limit switches wired in series on one input pin.
And it allows us to define and use a fixed safe Z value in fixed machine coordinates.
It is a normally closed momentary switch wired between ground and pin 12 on the BOB.
Since we're not using the existing 3 wire Z motor cable, we can use two of those wires, on pins 13 and 14 of the connector. On the other end (I think) those two wires are orange and green (check continuity to verify that).
Note: at some point we will change this to have all limit switches wired in series on one input pin.
And it allows us to define and use a fixed safe Z value in fixed machine coordinates.