Anycubic Predator Calibration using the Stock Controller

This 4-step solution has been tested by Predator owners using the stock controller, which uses some non-standard G-code commands.

You can download and print the parts I’ve posted on Thingiverse.
If you cannot print them, I am willing to print them for you in black PLA for $5/set.

Look at the labels on the arms.
Add up the six lengths and divide by 6, to calculate the average length.
In the following example I will use the value "440.433", but yours will probably be different by a fraction of a millimeter.
Use a free program such as Pronterface or Repetier-Host to connect your computer to your printer via USB.
Send the following three G-code commands to your printer:
```
	  M8083 S440.433
	  M8084 S223.75
	  M8500
	
```
Run the auto level routine through the touch screen.

Explanation:

Set the arm length to the right length for the new arms (440.443mm) using "M8083 S440.443"

Set the "Delta Print Radius" to a smaller value (down from the original 227mm to 223.75mm) using "M8084 S223.75"

Save the new values with "M8500"

Detail about the variables here: https://www.reddit.com/r/anycubicpredator/comments/egteex/stock_config_file_for_anycubic_predator/

Some valuable information on how delta printers work here: http://boim.com/DeltaUtil/CalDoc/Calibration.html