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Step 9Assembly of the sprockets and chains
Overview:
This step shows the process of putting together the sprockets and chains gear reduction system
Details:
Slide the 4mm shaft through on side, and slide in the big and small Meccano sprockets, then push the shaft out the other side of the bracket. Line up the sprockets to the corresponding sprockets that it will be attached to via the chain, but don't tighten the set screws yet.
With a pair of needle nose pliers, you can easily open and close the Meccano chains. Make the desired length of chain needed for both sets. Sprocket chain must not be too tight, otherwise it will cause too much friction and reduce the performance, or stall the engine completely. It should not be too loose either, or it will derail. You could add idler wheels to insure the right amount of tension (like on a bicycle), but I was too lazy to make something that fancy.
After a desired length of chain is chosen, loop around the sprockets and close the link with your needle nose pliers. give it a quick test by hand spinning it by hand. It should feel smooth. If it is too tight you will have a hard time spinning it. If it is too loose, the chain will derail if you spin it pretty fast. Add or take out one link at a time, until both sets spin easily.
Double check that both sets of sprockets and chains are lined up, and on the same plane. Secure the sprockets with the set screw - thread lock is strongly recommended as these parts will be spinning very fast and can come loose.
The ends of the shafts need to be held in place by lock collars. You can find lots of them at your local R/C hobby stores, you can find in just about any size. Make sure that you have a washer in between, and might be a good idea to add a drop of ball bearing oi, or other light oil to it, as well as the chains and sprockets.
This step shows the process of putting together the sprockets and chains gear reduction system
Details:
Slide the 4mm shaft through on side, and slide in the big and small Meccano sprockets, then push the shaft out the other side of the bracket. Line up the sprockets to the corresponding sprockets that it will be attached to via the chain, but don't tighten the set screws yet.
With a pair of needle nose pliers, you can easily open and close the Meccano chains. Make the desired length of chain needed for both sets. Sprocket chain must not be too tight, otherwise it will cause too much friction and reduce the performance, or stall the engine completely. It should not be too loose either, or it will derail. You could add idler wheels to insure the right amount of tension (like on a bicycle), but I was too lazy to make something that fancy.
After a desired length of chain is chosen, loop around the sprockets and close the link with your needle nose pliers. give it a quick test by hand spinning it by hand. It should feel smooth. If it is too tight you will have a hard time spinning it. If it is too loose, the chain will derail if you spin it pretty fast. Add or take out one link at a time, until both sets spin easily.
Double check that both sets of sprockets and chains are lined up, and on the same plane. Secure the sprockets with the set screw - thread lock is strongly recommended as these parts will be spinning very fast and can come loose.
The ends of the shafts need to be held in place by lock collars. You can find lots of them at your local R/C hobby stores, you can find in just about any size. Make sure that you have a washer in between, and might be a good idea to add a drop of ball bearing oi, or other light oil to it, as well as the chains and sprockets.
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