Question: Isn't there two junction boxes on the electric actuator? (1) There are two switches in the junction box (on and off respectively). (2) Inside the junction box are the 0 and full-scale points. Device, but there are upper and lower limit point devices, what is going on? (1) Isn't there a limit switch in the junction box? What use is this upper and lower limit potentiometer? If I want to adjust, I can adjust the limit switch. I feel that the potentiometer of the upper and lower limits is useless? Besides, what is the balance potentiometer adjusting?
Answer: First: The role of the limit switch is when the actuator telescopic tube reaches the top and bottom (distance of the upper and lower limit switches = stroke). The antenna of the nut on the inner tube touches the limit switch to turn off the power. , So it can only run in reverse. In simple terms, it is the maximum distance that the inner tube can be retracted.
Second: The switch in the junction box is used for lifting. After the switch is turned on, the inner tube can be raised or lowered. It can be stopped at any point within the stroke range. The rear telescopic tube will slide down automatically).
Third: The point device generally has five followers, two connected to the power supply, and three for signal control. The feedback signal is a resistance signal, such as a 10KΩ potentiometer. Its use range is 0 ~ 10KΩ. If the stroke of the actuator is compared Short, this is only a part of the range, maybe 0 ~ 5KΩ is enough. The potentiometer can be configured with an encoder to effectively adjust any stroke within the stroke range of the actuator, which can realize intelligence.
