Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
100% Manufactory
Set up since 2012, our company own the factory, and experienced.
PROFESSIONAL MANUFACTURER OF MICRO SWITCHES
Waterproof and dustproofdesign (IP67)
Compact size andcompact structure
Long lifespan andhigh reliability
Product Quality
Uiled have obtained relevant CCC, CQC, UL, VDE, CE, ENEC enterprise and relevant product certifications.
Sales Market
We have gained a global sales network reaching many countries over North America, South America, Europe, Africa and South East Asia.
After-Sales Service
A complete service network has been established to respond to user requests within 24 hours.
PRODUCTS
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
The core products include micro switches and travel limit Switch, push button switch, foot switch, toggle switch, AC power socket.
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ABOUT LEMA
Lema is committed to R&D, production and sales of industrial control electrical switches. The company's core products include micro switches and travel limit Switches, push button switches, foot switches, toggle switches, AC power socket.
After nearly 30 years of steady development, Lema has become a large-scale professional manufacturer of micro switches in China. The company currently covers an area of more than 11,000 square meters.
2000Years
Established in
40+
Exporting countries and regions
10000m2
Factory floor area
60+
Authentication certificate
APPLICATION
Committed to research and development, production, sales of industrial electrical switches and connectors
INDUSTRIAL
AUTOMATION
Industrial automation empowers smart manufacturing with reduced manual labor, higher precision, and greater efficiency.
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Customer recognition is our greatest motivation.
NEWS
Stay updated with the latest developments, product launches, and industry insights.
Limit Switch Troubleshooting: No Signal, Chatter and Misalignment
Limit switch troubleshooting should begin by locating where the expected position signal disappears: the machine target, actuator, contacts, cable or receiving controller. Secure the machine before inspection and compare the expected released and operated states with the approved drawing. Replacing the switch before making that comparison can hide a mounting or input fault. This guide concerns mechanical position switches on equipment. It does not cover furnace temperature-limit switches, whose protection function and diagnostic process are different. Never bypass a protective device to keep production running; unresolved safety-related faults require the machine's approved service and validation procedure. Preserve the fault before disturbing the installation Record the machine position, operating mode and symptom before loosening a bracket or disconnecting a cable. Note whether the missing signal occurs on every cycle, only at one travel direction or after a period of operation. Photograph the target-to-actuator relationship and any movement marks on the mounting surface. Keep controller messages and input observations with their timestamps so a later adjustment cannot erase the original evidence. Distinguish the process symptom from the electrical symptom. A carriage failing to stop is not, by itself, proof of a failed contact. The switch may not have been reached, its signal may not have reached the controller, or the control system may have recognised it without producing the expected response. Record what was observed at each boundary. The limit switch application guide explains the position-detection role; that role must be identified in the particular machine. Before hands-on work, follow the equipment's isolation process, including stored energy and motion hazards. OSHA hazardous-energy control requirements provide a United States workplace reference. A stopped drive or an off command is not necessarily an isolated...
↗Foot Switch Cable Length and Strain Relief for Equipment Controls
A foot switch cable should reach the intended operating position without pulling on the pedal, connector or internal terminals. Choose its length from the actual route, then verify conductor requirements, electrical interface, environmental exposure and strain relief. A longer cable is not automatically a better cable. Excess slack can create a trip or snag hazard, while a short lead can drag the pedal out of position. This guide covers industrial equipment command pedals, not amplifier accessories. The machine designer must approve the complete pedal, cable and control interface before operation; connector appearance alone cannot establish compatibility. Start with the command circuit, not the cable length Identify what the pedal actually controls. It may close a contact into a low-voltage controller, switch a relay circuit or form part of a manufacturer-defined interface. Those arrangements have different conductor, insulation and protection requirements. Do not assume that a familiar plug carries only a harmless signal. Read the equipment drawing, record the original pedal order code and confirm the supply and receiving input specifications before choosing a cable assembly. A guitar footswitch cable may use a connector that looks similar to an industrial command lead. That resemblance does not prove matching pin assignments, contact action, protective-earth requirements or input behavior. Likewise, an audio shield does not automatically serve as a protective conductor. If the machine documentation is unavailable, keep the equipment out of service until its electrical interface can be established by a qualified person. Use the LEMA LF foot switch product family as a starting point for a model enquiry. The reference photograph confirms an external pedal and attached lead; it does not establish the lead's exact length, conductor size, pinout or suitability...
↗Power Socket Contact Resistance: Measurement and Heat Rise
Power socket contact resistance adds electrical loss at the mating interface. Under a given current, a higher resistance produces more local power dissipation, but resistance alone does not predict the final temperature. The contact geometry, surrounding materials, ventilation and operating conditions also matter. For an equipment inlet, evaluate the complete mated connection and the actual application. Start with an isolated, repeatable resistance measurement and a qualified thermal validation plan. Do not use a continuity beep, a cool exterior surface or an unverified catalog number as proof that the connection is suitable. This guide concerns panel-mounted equipment power sockets and inlets, rather than household wall receptacles or RV shore-power connectors. It focuses on how to interpret contact measurements and plan a heat-rise investigation. Work involving installed mains equipment requires qualified personnel, suitable test equipment and the equipment's documented safety procedure. Define the connection being measured Identify the inlet, mating connector, terminals and measurement points. The resistance between two accessible points may include the mating interface, metal within the inlet, the cable termination and part of the cable. Without a clearly stated test boundary, two apparently different contact-resistance results may simply describe different paths. Record the exact inlet and cord-set identities, their condition and whether they are fully mated. Preserve the mounting arrangement and cable support in the test record. A new loose sample on a bench is not necessarily representative of a connection installed in a warm enclosure. Conversely, a measurement including a long cable cannot be described as the inlet's contact resistance alone. The University of Maryland CALCE contact-resistance measurement overview describes evaluation using actual contact geometry and controlled environmental conditions. It supports a central practical distinction: measure the connection...
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