Some times I don't have my drawing located in mach-3 in the right spot and the gantry runs into the stops at the front of the table and a I also had the carriage gear run off the rack on the far right side of the table. Is there any way I can install some limit switches so when I make an error it doesn't do that. Also there is a limit switch on the left side of the gantry but it does not stop the carriage. how would I go about trouble shooting that. Thanks Gary