This is the last video in a series of 4 explaining gear ratios using VEX robotics hardware. This video explains how the concept of gear ratios can be extended to sprocket and chain systems.
The only problem is this would not work for a bike you don't have a derailleur attached which is critical due to the tension it applies vs chain length. Most road bikes sold have the wrong chain length. You don't measure the chain by big ring vs big sprocket that is silly because you have removed the rear derailleur from the equation thus your length is now wrong. The 2 links added for chain is to reach the first jockey wheel, but you have not added the length for the bottom jockey wheel which is critical for chain slack. Uploading a video demonstrating this. Pro time trial bikes use bigger jockey wheels thus requiring a longer chain due to : size of jockey wheels! . I would say over 90% of road bikes with 7 speed freewheels (10 speed and 11 speed bikes are not affected by this) have a chain that is incorrectly measured. You still size the chain by big ring vs big sprocket, but you add the links that the jockey wheels take up so: 2 pin links to reach the top jockey wheel, 3 pin links to go around that jockey wheel, now add the links to go around the bottom jockey wheel (some bottom jockey wheels are bigger) so 4 pin links for a big jockey wheel you are now at 9 pin counts that you did not have before. These extra 9 pins is the secret to have proper chain slack, smooth shifting, smooth big ring on big sprocket combos. This procedure is critical for 7 x 3 road bikes ( 21 speed).
We need to eliminate one motor on our robot. We need to try and use one motor for our arm but are concerned about not having enough torque.Do you have any suggestions?
Hi, You have two options if you need to remove a motor from your arm. The first option is to add rubber bands or surgical tubing to your design which will help lift the arm. This will keep the speed of the arm the same. However, if you are trying to use the arm in the opposite direction such as putting a down pressure on something or lifting the robot off the ground the rubber bands or surgical tubing will work against you. The second option is to use a gear ratio which is lower than the gear ratio you're using currently. This will help your motors hold and lift your arm up, however it will slow down the speed of the arm. please see: kb.vex.com/hc/en-us/articles/360037389012-Robot-Arms-Mechanisms-for-VEX-V5 kb.vex.com/hc/en-us/articles/360035590932-Gear-Ratios-Motor-for-VEX-V5
I live in a hilly terrain and I'm on highways while commuting to work with my bike, I need to change sprockets to improve on bike pick-up acceleration and speed, any advice?
Sooo can I be stupid and put a 60 tooth gear with a 12 tooth gear that is above another 60 tooth gear that rotates another 12 tooth gear giving 1/25 torque but 25x speed?
Good video but here you given 1:4 ratio and you're taken 10 teeth on driver and 40 teeth on driven why you didn't take 4 teeth on driver and 16teeth on driven
4 teeth on the driver would bind the chain and The VEX Robotics system which I used the sprockets from only has certain standard sprocket sizes. Hope this helps.
The music DEFFINATLY makes it so exciting
love the music every morning!
Really really simple and great explanation .thank u u saved my day
Ty for your video simplest one to understand. Good compared to others but were good also👌💪👌💪
simple, yet helpful
Good video, but music is very distracting.
MrPlanman33 reminds me of a Pokemon battle
Great
very cool video
Ask for the video link, gear ratio 2.3 or 2.5! Thank you
This video would've been so much better without the background music.
Nice explanation though.
THNK YOU! Sound is back, I did not know it was gone.
Thanks for simple gear ratio axpletion
Make more! I'm a huge vex fan (I'm on a team)
this should be rated pg-14 thank you
Mantap
Why all bikes are connected small front gear to rear large gear!?
help ful
it's *4.2* gear ratio.NICE
Good!
7 years ago whoa
The only problem is this would not work for a bike you don't have a derailleur attached which is critical due to the tension it applies vs chain length. Most road bikes sold have the wrong chain length. You don't measure the chain by big ring vs big sprocket that is silly because you have removed the rear derailleur from the equation thus your length is now wrong. The 2 links added for chain is to reach the first jockey wheel, but you have not added the length for the bottom jockey wheel which is critical for chain slack. Uploading a video demonstrating this. Pro time trial bikes use bigger jockey wheels thus requiring a longer chain due to : size of jockey wheels! . I would say over 90% of road bikes with 7 speed freewheels (10 speed and 11 speed bikes are not affected by this) have a chain that is incorrectly measured. You still size the chain by big ring vs big sprocket, but you add the links that the jockey wheels take up so: 2 pin links to reach the top jockey wheel, 3 pin links to go around that jockey wheel, now add the links to go around the bottom jockey wheel (some bottom jockey wheels are bigger) so 4 pin links for a big jockey wheel you are now at 9 pin counts that you did not have before. These extra 9 pins is the secret to have proper chain slack, smooth shifting, smooth big ring on big sprocket combos. This procedure is critical for 7 x 3 road bikes ( 21 speed).
What the type and name of that small size chain ?!
Which on is better simple gear system or chain gear system ?
We need to eliminate one motor on our robot. We need to try and use one motor for our arm but are concerned about not having enough torque.Do you have any suggestions?
Hi, You have two options if you need to remove a motor from your arm. The first option is to add rubber bands or surgical tubing to your design which will help lift the arm. This will keep the speed of the arm the same. However, if you are trying to use the arm in the opposite direction such as putting a down pressure on something or lifting the robot off the ground the rubber bands or surgical tubing will work against you. The second option is to use a gear ratio which is lower than the gear ratio you're using currently. This will help your motors hold and lift your arm up, however it will slow down the speed of the arm. please see:
kb.vex.com/hc/en-us/articles/360037389012-Robot-Arms-Mechanisms-for-VEX-V5
kb.vex.com/hc/en-us/articles/360035590932-Gear-Ratios-Motor-for-VEX-V5
Im guessing the music got copyrighted and so you muted the video
Scidkelly
1 second ago
THANK YOU! Sound is back, I did not know the sound was gone.
Large gear to small gear connected by chain give more ratio,but y bikes consider small to large!?
Why the superman music?
Мудло !
What is the pitch size of the gears and chain?
Where did you get this small sprocket? is it available in amazon? and what are the chain number? is it normal bicycle chain or what?
Best gear ratio for a motorised bike?
@michael bato i have a 12/42 atm. I want more top end. . i dont want to crawl off the line tho. I was thinkin a 15/42. Or maybe a 18/36.
music not loud enough...
Ничего не понял, но было красиво! :)))
I live in a hilly terrain and I'm on highways while commuting to work with my bike, I need to change sprockets to improve on bike pick-up acceleration and speed, any advice?
A e-bike
Sir viyalakshmi engineering karunakaran Chennai
Sooo can I be stupid and put a 60 tooth gear with a 12 tooth gear that is above another 60 tooth gear that rotates another 12 tooth gear giving 1/25 torque but 25x speed?
Yes you could do that and make a light speed crank
Good video but here you given 1:4 ratio and you're taken 10 teeth on driver and 40 teeth on driven why you didn't take 4 teeth on driver and 16teeth on driven
4 teeth on the driver would bind the chain and The VEX Robotics system which I used the sprockets from only has certain standard sprocket sizes. Hope this helps.
good
Khunchanrithy Tep funny
Ciao
If you needed to watch this video to understand this, then you probably shouldn't be messing around with it :p
If all you do is boring motercycle videos you probably shouldn’t be on youtube
zaman kıaybı
good video, bad producing
Too lavada video