Everyone in a while, when i start a code the router drives the bit all the way through the piece and into the bed of the machine to the lowest limits of the gantry. It does this in less than a second and I don't often have time to hit the e-stop before it bottoms out. When I look at the screen It then shows that the Z is WAAAAAAY off. I have had this problem a few times and i have no idea why it happens sometimes and not others. I am wondering if I am doing something wrong. I have been recording my actions with the hopes that someone might be able to spot my problem. Here is what I did today
I started Mach 3
I tried to move the gantry with the key board so I could fasten a board, but the estop was pressed in
I pulled it out,
I fastened the board
I hit return to zero it did not move
i manually moved it to a central location
I set new zero locations and zeroed out the screens
I loaded the g code
I started the run
It ruined the board
Any ideas?
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