I have been climbing on the wall for a few months now. Usually once or twice a week in addition to whatever other climbing I manage to squeeze in, and now that the weather is getting nice it is really motivating to be able to open up the garage door and get some fresh air while climbing. It’s not climbing outside but it’s pretty sweet for a tuesday night.
I digress. I think that climbing on the wall through the winter usually at temps of around -5 °C the chain stretched, that or I am wearing it out faster than I would expect. Either way come spring time some of the planks weren’t quite getting pulled around in time to make it onto the return guide on the back of the wall and it was stalling. So I had to cut the return channel a bit and bend the return guides out a little more by hand, shown below. Bending by hand didn’t make for that pretty a product, but things are running again and I didn’t have to tighten the chain.
The next version of this design will definitely have longer lead ins like this from the get go. It will help avoid problems and I see no trade off in doing it. I will climb on it like this for a couple more months then check the chain to see if it has stretch significantly. If so I might consider going to a heavier chain than the #40 I am currently using.
Also, I had added the slotted hole so the lead ins would be easy to bend by hand, but with a crescent wrench it was pretty easy to bend the longer ones by hand. So next time there will be no holes and they will be a lot sturdier.
I am putting on 200 to 400 feet per session and I am guessing I have put at least 6000 feet of mileage on the wall and there are no serious problems cropping up so I think it is doing pretty well for a prototype.