Ok, I watched the video as suggested by one of the other posters which tried to explain the difference between machine coordinates and work coordinates (I think they call it work offsets for some reason).
I when into my homing limits as the video stated and no matter what I typed in, they didn't relate to the table view on the program run screen...my machine is 24 x 48 and I typed in zero as one parameter and 24 as the other for x....the table view showed it as a negative size totally unrelated to the numbers I typed in. And no, it wasn't metric because the size shown wasn't even CLOSE to 24 mm or 24 cm....so I reversed the values and again, it was totally unrelated to the actual size of the table.
In addition, I set the Z axis values...again, as was instructed, I set the zero at the top by the homing switch, and 7 1/2" at the bottom had no effect.
As indicated in the video the ONLY way to change or set machine co-ordinates is to ref all home....when I do that z zeros to the top (sets off the homing switch) then the Y starts to home, and instead of it travelling 49" to the other end, I stop it, then the Z rams itself into the top of the axis trying to move the z axis to the top of my house...instead of allowing it to destroy my machine, I hit the e stop.....
When setting the parameters in the homing limits, it states "values are in the setting units" how do you determine what the settings units are? The ONLY place I can see where units are discussed is under config and native units but this says it only applies to motor tuning.....
btw: I checked the limit switches, they all light up the LED in the diagnostics screen....
Under engine config, ports and pins, the column "active low" are all x'd out...the video says "this isn't good" but I am lax to change it because if it has anything to do with wiring, this could cause some burning/shorting and I can't afford to have my machine go down while I replace electronics.....so can anyone confirm if switching these to "yes" will or will not cause any physical damage?