z stop problem

[porsche1 0]

here is another problem that i am having. After a bed leveling and the bed goes down I get a message that the z stop is bad. Power down and power up and good to go. Minor problem but not right. I have a kit built um2+.  Z stop works fine under at all other times.

[gr5 1,108]

It might be that the firmware thinks your machine isn't as tall as it is in real life.  If you have tinkermarlin you can set that value I think.  Is your machine significantly (10mm) taller than a standard UM2?

 

Also, are you sure bits of plastic haven't fallen onto the switch?