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.
M8083 S440.433 M8084 S223.75 M8500
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
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