The ISO control pattern is a standardized control scheme used primarily in heavy equipment, particularly excavators, where the left joystick controls the swing and stick boom motions, while the right joystick controls the main boom and bucket motions.
Understanding the ISO Control Pattern
The ISO (International Organization for Standardization) control pattern is designed to provide operators with an intuitive and efficient way to operate heavy machinery. It's defined in ISO 10968 and SAE J1177. Here's a breakdown:
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Left Hand Joystick:
- Left/Right: Controls the machine's swing (rotation left and right). Moving the joystick left causes the machine to swing left, and moving it right causes the machine to swing right.
- Forward/Backward: Controls the stick boom (also called the dipper arm). Moving the joystick forward extends the stick boom away from the machine, and pulling it backward brings the stick boom closer to the machine.
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Right Hand Joystick:
- Forward/Backward: Controls the main boom. Moving the joystick forward lowers the main boom, and pulling it backward raises the main boom.
- Left/Right: Controls the bucket. Moving the joystick left closes the bucket (curling it in), and moving it right dumps the bucket (curling it out).
Benefits of Standardization
The standardization of control patterns like ISO offers several key advantages:
- Reduced Training Time: Operators trained on one ISO-compliant machine can more easily transition to operating other machines with the same control pattern.
- Increased Safety: Consistent controls minimize the risk of errors caused by operating unfamiliar equipment.
- Improved Efficiency: Intuitive controls allow operators to work more efficiently and precisely.
Why is it called "ISO"?
The name reflects the fact that the pattern is standardised by the International Organisation for Standardisation (ISO). This means equipment manufacturers adhere to this arrangement, promoting consistency across different brands and models.
Alternative Control Patterns
While ISO is a common pattern, other patterns exist, such as SAE and Deere/Komatsu patterns. The choice of control pattern can depend on operator preference or regional standards. It's crucial for operators to be aware of the control pattern used in the specific machine they are operating.
