11
5 Limit Switches & Limit Cams: Adjustment & Functionality
WARNING
To reduce risk of SEVERE INJURY or DEATH to persons:
• Do not attempt to make limit switch adjustments unless power has been electrically disconnected.
5.1 Limit Switch Adjustments: Open and Close Cam Settings
This operator is equipped with the ACCU-CAM® feature, for precise and quick one-handed limit setting adjustments.
To adjust the limit cams, see Figure 5.
1. Pull the cam's retaining bracket back.
2. Turn the cams for limit adjustment: turning cams toward the center of the limit shaft increases door travel or
turning the cams toward the limit switch decreases door travel.
5.2 Limit Switch Functionality
Open Limit Switch and Advanced Open Limit Switch
When activated, the Open Limit Switch will stop the operator while the door is travelling in the upward direction.
Should be adjusted accordingly to stop door in fully open position. The microprocessor has a built-in program that
replaces the Advanced Open Limit Switch.
Close Limit Switch and Advanced Close Limit Switch
Close Limits are not present on operators with an ECB. In it's place, the microprocessor has a built-in patented
Advanced Close Time feature. While the door is travelling downwards and once the Advanced Close Limit Switch is
activated, the door will stop after 200 milliseconds. The distance travelled varies according to the speed of the door.
The value is fixed and cannot be re-programmed or adjusted.
For technical support, please call 1-800-4-Raynor (1-800-472-9667) or visit www.raynor.com
Figure 5 - Limit Cam Adjustment
Open Cam
Adv. Close
Limit Switch
Open Limit
Switch
Close Cam
Cam
Retaining
Bracket
Increase
Door Travel
Decrease
Door Travel
Open Side
Close Side
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