Rotary Arm Swing Operator
By Huu Khanh Nguyen · Updated October 29, 2026 · centurion, rotary, swing-operator, pedestal-mount, wall-mount, articulated-arm
A rotary swing gate operator in a smooth cover that stands on a pedestal or a wall bracket beside the gate and swings the leaf with a drive arm and a telescopic connecting arm.
Parameters
| Name | Default | Unit |
|---|---|---|
| Leaf angle | 0 | ° |
| Opening angle | 90 | ° |
| Hinge depth in the post | 0 | mm |
| Mounting height | 77 | mm |
| Sliding travel | 0 | mm |
| Leaf length | 2000 | mm |
| Leaf weight | 200 | |
| Handing | left | |
| Number of leaves | 1 | |
| Post width | 200 | mm |
| Leaf guidance | ground | |
| Shaft behind the hinge axis | [370, 340, 260, 220, 230, 330, 300][(openingAngle - 60) / 10] | mm |
| Shaft across from the hinge axis | [750, 750, 750, 700, 700, 600, 450][(openingAngle - 60) / 10] | mm |
| Bracket distance on the leaf | [700, 700, 700, 700, 650, 610, 570][(openingAngle - 60) / 10] | mm |
| Drive arm length | (Math.hypot(pedestalAlong + bracketDistance, pedestalAcross) - Math.hypot(pedestalAlong + bracketDistance * Math.cos(openingAngle * Math.PI / 180), pedestalAcross - bracketDistance * Math.sin(openingAngle * Math.PI / 180))) / 2 | mm |
| Connecting arm length | (Math.hypot(pedestalAlong + bracketDistance, pedestalAcross) + Math.hypot(pedestalAlong + bracketDistance * Math.cos(openingAngle * Math.PI / 180), pedestalAcross - bracketDistance * Math.sin(openingAngle * Math.PI / 180))) / 2 | mm |
| Bracket pin x | (bracketDistance) * Math.cos(leafAngle * Math.PI / 180) - (0) * Math.sin(leafAngle * Math.PI / 180) | mm |
| Bracket pin y | (bracketDistance) * Math.sin(leafAngle * Math.PI / 180) + (0) * Math.cos(leafAngle * Math.PI / 180) | mm |
| Crank arm angle | Math.atan2(eyeY - (pedestalAcross), eyeX - (-pedestalAlong)) * 180 / Math.PI + 1 * Math.acos(Math.max(-1, Math.min(1, ((crankLength) * (crankLength) + Math.hypot(eyeX - (-pedestalAlong), eyeY - (pedestalAcross)) * Math.hypot(eyeX - (-pedestalAlong), eyeY - (pedestalAcross)) - (connectingLength) * (connectingLength)) / (2 * (crankLength) * Math.hypot(eyeX - (-pedestalAlong), eyeY - (pedestalAcross)))))) * 180 / Math.PI | ° |
| Elbow pin x | (-pedestalAlong) + (crankLength) * Math.cos(armAngle * Math.PI / 180) | mm |
| Elbow pin y | (pedestalAcross) + (crankLength) * Math.sin(armAngle * Math.PI / 180) | mm |
| Finish | white |