If the machine starts moving or drifting on its own during simulation—even when you’re not touching any controls—it’s most likely a calibration issue.

Uncalibrated devices may send unintended input signals, causing the simulation to interpret them as commands.

How to Fix It

1. Use the Calibrate option found within your simulation software to recalibrate each control device.
2. If you’re using a 2-Pedal Unit (especially for Hydraulic Excavator), remember that recalibration is needed every time you restart the PC.

Once properly calibrated, all controls should behave as expected with no unintended movement.