Garage Torsion Springs busted tonight!!

[thedave1164]

Replaced my springs today, not a bad deal at all, would not have tried it without using the winding bars I purchased with the springs.

Door goes up and down

[Chris__Colorado]

Now that is a cool idea! Is the counterweight made from concrete?

Was replying to the post with picture
"Counterweight system is the answer.
Home-made or Commercial"

Chris__Coloraod

[Chris__Colorado]

Now that is a cool idea! (counterweight for garage doors post earlier)
Simple physics and less parts.
I like it.

[Gman]

The counterweight idea applies force uniformly, doesn't it?

As the vertical panels go horizontal, which reduces the overall vertical load, won't it try to accelerate the opening movement? Whereas the tortion springs gradually apply less force as the door opens.

[davsel]

Separate cable spools for door and counterweight = more torque when the door is down.

[Gman]

The ratio is fixed. There's no variation in torque.

[davsel]

As the door raises, the door spool radius effectively grows while counter-weight spool effectively diminishes, thus continuously changing the ratio.

[BladesNBarrels]

How many angels can dance on the head of a pin?

[thedave1164]

As the door raises, the door spool radius effectively grows while counter-weight spool effectively diminishes, thus continuously changing the ratio.

ouch, I just want to open my garage door, not make a trip to Mars

[CS1983]

ouch, I just want to open my garage door, not make a trip to Mars

The garage door knows where it is, because it knows where it isn't.