Linear actuators are found in various machines that require linear motion, from simple disk drives to heavy industrial machinery. Though useful, there are problems associated with linear actuators. The problems experienced when using a linear actuator depends on the type of actuator.
Electric linear actuators
According to 12v electric linear actuators store, defects and errors of electronic components and electrical circuits of linear actuator system can cause fire. There is usually heating around the conducting circuit or component of the printed circuited board due to continuous supply of electricity to the faulty area. This heating caused by the continuous electricity supply is a latent fire hazard. Since the electrical circuit is not constantly connected, the fire does not develop immediately but the hazard increases over time.
Hydraulic linear actuators
Hydraulic linear actuators require proper maintenance and will develop problems like heat, noise and leakage when not properly maintained. This linear actuator needs additional equipment for reducing noise and heat as well as additional components like fluid reservoirs, release valves, filters, motors and pumps.
Changes in temperature alters the viscosity of fluid, increased viscosity at low temperature causes sluggishness. Another problem is that if leakage occurs there is loss of performance. In general hydraulic linear actuator have high fire risks.
Pneumatic linear actuators
The main problem associated with this linear actuator is that control of speed and position is not easy. Another problem is that resetting is not easy especially if there are no mechanical stops. This type of linear actuator is not suitable for heavy loads. If moisture penetrates the system rust occurs. Hydraulic power source are expensive a new power source costs more than $500
Electromechanical actuators require a transmission system, this adds mass and unwanted movement to the system. The moving parts of electromechanical actuators are also prone to wear. Electromechanical actuators require additional power translating to greater costs.