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2026/09
The slot-type photoelectric sensor (U-shaped photoelectric switch) is widely used in automated equipment almost every day. However, many people only focus on the slot width and output type, but overlook the two unremarkable marks on the sensor housing - the scale line and the arrow. They may seem simple, but in fact, they directly affect the detection accuracy and anti-interference ability.
more2026/09
The magnetic switch needs to be fixed on the outer wall of the cylinder barrel in order to sense the magnetic field of the magnetic ring on the piston and output position signals. However, the structural forms of cylinders vary - there are lever-type, circular cylinders, and standard profile cylinders - and different cylinders require different fixation methods. Currently, the most commonly used on-site types are three: strap-type, clamp-type, and guide rail-type, corresponding to different cylinder types respectively.
more2026/09
The color mark sensor is a type of photoelectric sensor specifically designed to identify the contrast difference between printed marks (color marks) and the background. It is widely used in automatic control systems in industries such as packaging, printing, pharmaceuticals, and textiles, and can achieve functions such as automatic positioning, fixed length, cutting, deviation correction, and counting.
more2026/09
The output signal of the safety door lock cannot be directly connected to the input points of a regular PLC. Regular PLCs do not have a safety redundancy mechanism. If the contacts are stuck or the circuit is short-circuited, the PLC may still receive the erroneous signal that "the door is closed", causing the equipment to operate normally even when the protective door is open. The safety door lock must be connected to a safety relay or a safety controller, and the safety logic of "inspection - judgment - disconnection" is executed by the safety relay.
more2026/09
In pneumatic control systems, magnetic switches are widely used to detect the position and return of the cylinder piston. They trigger signals by sensing the magnetic field generated by the permanent magnetic ring embedded on the piston. However, many sites have encountered the same problem: even though the switch was newly replaced and the wiring was checked, when the cylinder moves, the magnetic switch either shows no response or the signal is intermittent. This is usually not due to a malfunction of the switch itself, but rather issues with the installation position or the state of the magnetic ring.
more2026/09
At the liquid level detection site, the foam in the water tank and the adhering residues on the inner wall of the oil tank are the two most common "false alarm culprits" encountered by capacitive proximity switches. Even before the liquid level reaches the set point, the switch acts prematurely; or when the liquid level has already dropped, the switch fails to reset in time. Many engineers assume that the sensor is faulty and keep replacing it repeatedly, but the problem persists. In fact, the problem lies in the change of dielectric state, while the sensitivity remains at the factory setting.
more2026/09
In industrial settings, M12 circular connectors are widely used in devices such as proximity switches and photoelectric sensors. However, many engineers have encountered such a situation: the signals from the equipment were intermittent during operation. After a long investigation, they eventually discovered that it was just the M12 connector that was loose.
more2026/09
With the rapid development of flexible manufacturing and intelligent logistics, AGVs (Automated Guided Vehicles) are becoming increasingly popular in factories and warehouses. These mobile devices move between people and materials, and the safety protection on their running paths has become a matter that must be taken seriously. Safety barriers are set up along the AGV's travel path. When people or obstacles enter the path, the AGV can be immediately stopped to avoid collisions. However, unlike fixed equipment, AGVs have more specific requirements for safety barriers.
more2026/09
In industrial settings, many users have encountered such a situation: when a metal object approaches the proximity switch, the switch operates sensitively; but after the object moves away, the switch fails to reset promptly, as if it "reacted half a beat too late". Some think the switch is broken, while others believe the "lag" is too severe - but neither is the case. The reason behind this phenomenon lies in a very important design parameter of the proximity switch: hysteresis.
more2026/08
After the safety grating is powered on, it immediately reports an error and locks up, preventing the device from starting. This is one of the most common and troublesome faults in the field. Many people initially think "the grating is broken", but in most cases, the problem is not with the grating itself, but lies in the power supply, wiring, or selection.
more2026/08
The safety barrier has been installed, the indicator light is on, and the equipment is functioning normally - many users think this means "safety". But the reality is: installing a barrier doesn't mean safety is achieved; only when the barrier is installed in the correct position does it count. If a person can bypass the barrier from the side, above, or below and come into contact with the hazard, then the barrier is useless.
more2026/08
Among the selection parameters for safety door locks, "holding force" (Holding Force) is one of the parameters that is most prone to misunderstanding and incorrect selection. It determines whether the protective door can be forcibly pulled open when the equipment is in a dangerous operating state. Is 1300N sufficient? The answer is: It is sufficient for the majority of conventional equipment, but it is not universal.
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