Common Problems with Barrier Gates
Common Problems with Barrier Gates
Checking whether the barrier gate is convenient and simple to use, aside from the quality of the barrier gate itself, the most crucial aspect is its installation.
Barrier gate arm rises after falling automatically:
The lower limit position is not set correctly, indicated by the red light not turning on after the arm falls. This can be resolved by adjusting the limit switch.Excessive spring tension may cause this issue. It can be resolved by adjusting the lower spring adjustment nut or loosening the spring screw.
Unable to raise/lower the gate with card swipe or remote control:
The motor may be stuck. This can be resolved by rotating the black small rotor below the motor.
When enabling the barrier gate, always ensure that the vehicle detector is properly connected. During normal operation, remind pedestrians to pass after the gate is lowered (especially elderly and children).
When wiring, always follow the wiring diagram. After wiring, test whether the vehicle detector is functioning properly. When the red light of the detector flashes, place an iron plate above the coil. If the red light stays on when the iron plate is removed, and the barrier gate automatically lowers, the product is functioning properly.
When laying the induction coil, dig a trench 10cm deep and create a 2×0.8m square nest. Cut the corners at a 45-degree angle. Place the induction coil (1 square millimeter) layer by layer, totaling 6-8 layers, ensuring that each layer is tightly compressed and there are no joints within the coil. Connect the output end of the induction coil to the barrier gate with twisted pair cables, keeping the distance as short as possible. After connecting, seal the nest with dry cement. Note: The cross-sectional area of the induction coil should be 0.5-1.5 square millimeters of high-temperature copper wire. The size of the wire cross-section has little effect on the induction intensity.
After the induction coil is wound and powered on, it will generate low-frequency oscillations. When metal enters the coil, the magnetic field weakens, which is picked up by the magnetic sensor, causing a corresponding action. The induction intensity of the induction coil is closely related to the number of turns and the shape of the coil. Too many turns will result in high input impedance, causing an open circuit; too few turns will result in low input impedance, causing a short circuit. Both situations will cause the working indicator light of the magnetic sensor to flash rapidly. The general number of turns is 6-8 loops.
During barrier gate debugging, short-circuit the “up” and “ground” terminals. If the gate arm automatically rises, the barrier gate is functioning properly.
When wiring the card reader, use an 8-core shielded cable according to the diagram, and be careful not to break the wires during installation.
The controller operates on a 12V DC power supply, while the card reader operates on a 14V power supply. Ensure not to confuse them.
Install the vehicle detector coil under the barrier gate, with a distance of 3-5 meters between the barrier gate and the card reader.
Common Troubleshooting for Barrier Gates:
6. Loose adjustment nut of the lower hook:
1. Loose coil burial:
When the induction coil is not securely fixed in the nest, vibrations from passing vehicles can cause deformation of the coil, altering the initial inductance of the vehicle detector. In such cases, the sensor must be reset before it can function properly. The solution is to pour melted asphalt into the nest to secure it.
2. Loose wire:
The hinge screw consists of opposing threads. If this screw becomes loose, it will cause inaccuracies in both the upper and lower positions. Use an 80mm long, 4mm diameter iron rod to rotate and adjust the gate arm’s positioning between the double-ended screws.
3. Loose arm screw:
If this screw is loose, it will cause inaccuracies in the upper and lower positions of the gate arm and significant swaying when the arm stops. Tighten the bolts and nuts to secure it.
4. Misplacement of position control magnet:
Both upper and lower positions utilize sensitive Hall elements. If the position of the rectangular magnet and the circular piece on the gearbox camshaft changes, it will result in inaccurate positioning. Adjust it accurately without flipping it to resolve the issue.
5. Power failure protection switch tripped:
When the control part of the machine malfunctions, the automatic protection device of the machine will activate, causing the gate arm to stop in a slanted position, and the main power will be cut off, rendering the machine inoperable. Open the machine door and rotate the large belt clockwise 3-8 turns to the upper position to restore it. If this fails to restore it after multiple attempts, check if the Hall elements and circuit board are malfunctioning.
6. Loose adjustment nut of the lower hook:
There is a threaded M10 lower hook in the lower part of the chassis, which functions to hold the spring of the balancing mechanism and adjust the zero point of the balancing function. It is equipped with two M10 hex nuts and Ø10 spring washers. If this nut becomes loose, knocking sounds and imbalance will occur during machine operation. Although the machine can still operate after imbalance, it will significantly increase the load on the gearbox, motor, and other transmission components, affecting reliability and mechanical life.
Method for Adjusting the Balance State of the Barrier Gate:
- Loosen the arm screw to detach the upper arm from the rocker arm, allowing the spindle to be in a free state.
- Install the gate arm in the normal operating position.
- Use hands to push the gate arm to a vertical position.
- Adjust the lower hook to lightly touch the spring pull ring, and tighten the nut to secure the lower hook.
- Push the gate arm to a horizontal position by hand. If the gate arm droops at this point, it indicates that the tension of the balancing spring is too low. Adjustment method:Make the gate arm vertical, remove the spring, rotate the upper hanging plate of the spring outward by 1-2 turns, hang it back, and repeat until it reaches a horizontal position. Adjust in the opposite direction if the state is reversed.
- Tighten the arm screw and lock the nut.
- Tighten the nut to lock the lower hook.
- Balance adjustment is complete.
Barrier Gates installation
Pre-embedded Wiring:
Determine the location of the cabinet as per customer requirements. Concrete foundation casting should be completed beforehand (the size of the foundation should be about 100-150mm larger than the outer dimensions of the barrier gate).
Burrow or excavate cable trenches between the control room or guard booth as per the fixed position of the cabinet. Lay conduit pipes for the 3×1.5 square millimeter power cables and 4×0.5 square millimeter control cables used by the equipment. After confirming no errors, backfill with concrete.
Fixing the Cabinet:
Place the cabinet in the fixed position. Loosen the butterfly nuts on the cabinet door to release them (handle the cabinet door and nuts carefully to avoid surface scratches).
Mark the center of the screw holes on the bottom plate of the cabinet and the edge of the cabinet base. Move the barrier gate aside and mark the screw hole positions.
Use a drill to vertically drill holes on the marked spots (the drill bit size should match the expansion bolts provided with the equipment). The depth should meet the length requirements of the expansion bolts.
Move the cabinet back to its original position, insert the expansion bolts, and tighten them securely.
Barrier Arm Installation:
After firmly fixing the barrier gate cabinet, proceed with the barrier arm installation. Tighten the arm position using the provided screws and ensure the inclination of the barrier arm. If needed, install the fork and adjust it to the vertical and horizontal states.
Use hands to rock the barrier arm to check its horizontal position. Determine the position for installing the fork at the end of the barrier arm and securely fasten it with screws (if no fork is needed, skip this step).
Installation of Peripheral Equipment:
Once the barrier gate is securely installed and adjusted, according to customer requirements, follow the wiring diagram of the barrier gate control panel to connect the cabinet wiring and relevant peripheral equipment control lines. Carry out necessary adjustments and testing.
These are the main steps of barrier gate installation, but there are many aspects to consider during the installation process. Below are some points to note during barrier gate installation.
