Latching solenoid lock?

[swervyn]

Once the lift / platform is away from the switches, you cannot tell which way it moved unless there is a mechanical latch or toggle of some sort to indicate that; that's why the double-roller type are used in positioning applications.

It looks like those switches stay latched either way (depending on the lift travel), the actuators work by pulse signal so the switch needs to return to "off". I will try and draw something up

 

[swervyn]

Ok, hope this makes sense!

 

[rjenkinsgb]

OK, got you.

You need two switches with "one way roller" actuators. one for each direction..
The roller arm itself has an extra "knee" in it so motion from one side operates the switch and motion the other way folds the lever instead.

https://www.cesco.com/images/products/EatonCutlerHammer/E47BLS35.jpg
Or a cheap version
https://www.aliexpress.com/item/1NO...y-Micro-Limit-Switch-CM-1743/32824738189.html

Be careful, some sellers seem to consider any switch with an offset hinge arm "one way" even if they do not have the knee mechanism.

 

[swervyn]

OK, got you.

You need two switches with "one way roller" actuators. one for each direction..
The roller arm itself has an extra "knee" in it so motion from one side operates the switch and motion the other way folds the lever instead.

https://www.cesco.com/images/products/EatonCutlerHammer/E47BLS35.jpg
Or a cheap version
https://www.aliexpress.com/item/1NO...y-Micro-Limit-Switch-CM-1743/32824738189.html

Be careful, some sellers seem to consider any switch with an offset hinge arm "one way" even if they do not have the knee mechanism.

Thankyou! Was hoping to be able to do it with one switch but can see how two of those each floor will work perfectly

 

[mbarazeen]

Check the limit switches that are used for crane, these are latching type and directional.
**broken link removed**

You can lock the doors by another way by using momentary limit switch to lock the top door when the lift reaches the bottom and vise versa. the limit switch on landing at bottom will lock the door on the top. when the lift is on middle both doors will remain unlocked.