How do you reverse the z direction?

[knight_toolworks]

strange question but with the retro z upgrade on my prt alpha the rack is on the opposite side of the motor so i need to change the direction how do I do it?

[Gary Campbell]

Put a minus sign in front of the unit value for the Z

[knight_toolworks]

Put a minus sign in front of the unit value for the Z
ya got that right before I left. shopbot should add that into their instructions because it is always going to happen. I found missing nuts in the package and the wrong screws to mount the motor into the plate. plus they give you bracket to mount under neath but you don't always need it. I tried with with and I had maybe 5" of z. took it off and got it right.
thanks for the info I will call shopbot and tell them they need to get the in the instructions.