The new 4k camera module is bigger, so the mount is bigger also. To get an existing machine to use the new mount, do the following:

First, connect the cameras and set resolution to get acceptable switching speed between cameras and good frame rate, and align the cameras. Follow the current setup instructions a few pages, starting from this page. Don’t forget to measure and set new pixel size (box size).

You have your homing algorithm set up already, but the camera position in the machine has changed. Therefore, the new camera doesn’t see your current homing mark after the mechanical homing. To fix: Click “Home”. The process fails, as the mark is not in the image. Jog the machine so, that your mark is in the upper right corner. Note the amount of jog you needed to do (current coordinates).

TinyG parameters that control how much it backs off after hitting X or Y homing switches are called X/Y Zero Backoff. Find the current Y value by sending text $yzb to TinyG. Add the amount you needed to jog on Y direction to the number, and set new value by sending $yzb=24 (or whatever number you need). Do the same on X value, if needed.

Finally, find and set your machine limits (max movement on X and Y direction before a limit switch is hit).