If this question has been answered before sorry I couldn't find it.
I built a Mendel90 1.5v with Gen 7 motherboard and ATmega1284P chip. I'm using Marlin 1.0.0 because it's the only one I can get to compile right for now. I'm also using Arduino IDE 1.8.12 and Pronterface to do the printing.
Here's the problem my z axis stop switch is at the top left as per the build manual. The z axis always homes to the top stop switch. When I go to print in Pronterface the z axis doesn't lower to the bed it stays at the top and tries to print in the air.
Because I'm using Marlin 1.0.0 I do not have a line that says #define Z_HOME_POS 0, I only have #define MANUAL_Z_HOME_POS 0.
The distance from my stop switch to the bed is 188.50mm.
I do not have auto bed leveling, figure I might add that later.
Can some one please tell me how I get the z axis to come down to the bed when printing.
Thank you. Kenn