@firewirehn Normal TTL convention is high is ON and low is OFF, the laser you showed is opposite which is really dumb. So it would need a TTL logic inverter on the input, you should also include a pull down resistor for safety. If you don't have electronics experience I would just purchase a better laser like the Eleks brand that is plug and play with their board.
@firewirehn OK, so if you do not have homing switches you must disable that function (if you enabled it). If the house icon is red you have enabled the feature without having the hardware required, so go to the settings menu and disable home switches.
You can then right click the house to set work piece origin (0,0), this is where it will start and finish the job. This position will be remembered until you exit the laser controller screen. So leave the laser at 0,0 when you exit and it will keep the location when you return.
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