Need Help! Gerber System 48 Build Issues Video and Pictures Inside!

[JAZZCNC]

The mach3 is set to metric. I don't know the revolutions

Ok well in this case your massively setup wrong and will be most of your prolem. Also given the nature of how each axis uses gears etc then there's a better way to find the Steps per setting.

Here's what to do.!
First Jog each axis into clear space with room to move.

Set the drives micro steps to 1600. Then in Motor tuning set the Steps per number to 60, this is just tempory and I'm guessing the pitch will be 10mm. Set velocity and Accel to 1000 & 300. In motor tuning Remember to Click on each Axis to change then save after making changes.
Then check to see if machine moves ok. If stalls then lower velocity.

Now goto Settings Tab and just above Reset you'll see button called "Set steps per unit" . click on it and select the axis you want to set first. Enter a movement amount, make it small at first say 10mm. Then before pushing Enter mark the axis so can measure how far it moves.
When you push enter it will and box will appeat asking how far it moved. Enter distance it traveled and it will work out the steps per setting for you and enter it into Motor tuning.
Do this for each axis but remember the Z axis will need Negative number to move down.

This will get you very close to correct and machine should move ok now. Now repeat but measure over a longer distance and try to measure accurate possible.
Now your set to tune the velocity and acceleration to higher numbers but don't go to high else you'll get stalling motors.

Also other reason why you struggled with Road runner was because the G-code is set for Inches not metric so the moves are tiny and because your machine is so badly setup it was double edge sword.