Limit switch

  • #1
Can someone explain to me how limit switch works in everday language, I got some sources that are too technical.

Thank you,
 

Answers and Replies

  • #2
dlgoff
Science Advisor
Gold Member
4,050
2,070
Stanley_Smith said:
...I got some sources that are too technical.

Thank you,

Share the sources and maybe we can help.

Regards

Don
 
  • #3
http://www.ab.com/sensors/products/limit_switches/ [Broken]

I find it's not very easy to comprehend 100% the whole article
 
Last edited by a moderator:
  • #4
NoTime
Science Advisor
Homework Helper
1,570
0
The real difference between a "limit" switch and any other switch is that it is connected to a control function.
In other words activation starts, stops or otherwise modifies some process.

Your link is to a particular device that can be used for this function.
There are other types using light, magnetism, pressure ect.
You could take the light switch off your wall and use it as a limit switch.
 
  • #5
Integral
Staff Emeritus
Science Advisor
Gold Member
7,212
56
It is simply a switch which is activated by something "hitting" it. There are many different types of limit switches.

If you have a mechanism driven by a motor, it is very helpful to know when you have reached the end of your motion range. You can to this with a mechanical switch which is simply a micro switch with a arm attached. When your moving part compresses the arm the switch flips and turns off your motor (That is not the actual mechanism, but essentially what happens).

There are also optical limit switches, for these you attach a "flag" to your moving part, the flag (a tab of metal) passes through the optical switch it blocks passage of light (the source is a LED) and trips the switch.

Limit switches are on virtually all electro-mechanical mechanisms which involve movement of significantly massive parts. In modern equipment they are usually monitored by the software which is controlling the motion.
 

Related Threads on Limit switch

Replies
12
Views
2K
  • Last Post
Replies
5
Views
994
Replies
7
Views
3K
  • Last Post
Replies
1
Views
2K
Replies
4
Views
1K
Replies
3
Views
4K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
9
Views
3K
  • Last Post
Replies
12
Views
7K
  • Last Post
Replies
3
Views
7K
Top