Operation buttons on a roll forming machine typically control various functions to ensure the smooth operation of the machine.

1. Start Button: Initiates the machine's operation, starting the motor and feeding material into the roll forming system.
2. Stop Button: Stops the machine's operation, halting all movement to avoid damage or accidents.
3. Emergency Stop (E-Stop): A large, easily accessible button that immediately stops all machine operations in case of an emergency. This is critical for safety.
4. Forward/Reverse Buttons: Control the direction of the material feed. The forward button moves the material through the machine, while the reverse button retracts it if necessary.
5. Speed Control Dial/Buttons: Adjusts the speed at which the material is fed into the roll forming machine, allowing for precision in production.
6. Jog Button: Moves the material incrementally forward or backward to help with setup, alignment, or adjustments.
7. Cut/Shear Button: Activates the cutting mechanism to shear the roll-formed material at the desired length.
8. Length Setting Display/Button: Allows the operator to set the desired length of the finished parts, with the machine automatically cutting the material once it reaches this length.
9. Run/Auto Mode Switch: Switches between manual and automatic modes of operation. In automatic mode, the machine runs continuously, while in manual mode, each operation is controlled by the operator.
10. Lubrication Button: Controls the application of lubricants to the rollers and forming dies to reduce friction and wear.
11. Pause/Resume Button: Temporarily halts the machine operation without a full stop, allowing adjustments before resuming.

These controls can vary depending on the specific roll forming machine model and its complexity, but most will include these basic functions for operation, safety, and precision control.