[Shop-talk] Garage Door Openers

[Wayne]

Steve Hammatt, Mount Vernon WA USA wrote:
> I have 3 openers.  They're 1/3hp Lift Master units with chain drive. 
> I'm not sure how to adjust them.  They don't stop at the bottom, 
> but instead hit bottom and then reverse direction and head back up. 

I'm guessing it's the same as mine and other LMs I've seen.  The manuals 
are easily googleable.

There are two multi-turn pots on the side for upper and lower travel 
limits, and two on the back for up/downward force threshold to detect an 
obstruction.

   -Wayne