So watched lots of YouTube videos on mobile goal intake systems. My question is how many motors should you have for a 4 bar intake design. I thinking 2 that are geared but not to sure because mobile goals are around 4lb
2 torque motors geared externally 5:1 is perfect for me and so many other teams.
There are a lot of successful combinations out there from one motor to four motors. We have a team that had two dedicated motors on a chain bar mogo intake decide to switch to a four motor mogo intake with turbo speed motors that are shared with the drive. This frees up the two dedicated motors and makes the lift much faster.
The answer for your robot may be different. It will depend on your overall strategy, design, and build quality. Good luck.
You should never have to use more than 2 motors for your mogo lift. if you need more, there is something wrong with your design (unless you are doing the shared motor thing that @antichamber made and said not to use).
On ours we used 1 Motor geared to 1:9.
Having recently considered it, my worry with pairing is that you can’t drive the mobile goal and drive fluidly, which totals up quite fast in skills, if your mg intake takes even a second to lift and lower, there goes 16 seconds of your skills match, or a quarter of your time, just because you paired the motors.
We use one motor with a 1:7 ratio along with rubber bands to help pull the intake back in. It hasn’t had any issues. Personally I think that one motor is fine
1:3 works with 2 motors but some have tried it and not had success. We have 1:3, 2motors, no rubber bands, but we use a combination of two linkages. It does not stall or burn out, and it has enough power to lift the robot.
LOL. Antichamber was not the first to make the drive and mogo intake with shared motors, but he is the one who somewhat popularized it even though his first two attempts were not that great. They were more of a proof of concept. I do believe he is back to using it after having seen others to it with success.
The key is the same as it is for most concepts. It comes down to designing low friction and good build quality. The good news is that it takes no motors dedicated to the mogo but you still get to use 4 of them with turbo speed motors.
Once you get that figured out, the toughest decision is if you will use an 8 turbo motor drive or a 6 turbo motor drive. There is reasonable debate on which is better.
I have built several 4-bar mobile goal lifts, and they all work with a 2 motor 3:1 gear ratio. Probably the best ratio to go with.
I did 2 torque motors 7:1, and it worked fine. As long as the four bar isn’t over-center it’s all good. If two torque motors with that gearing isn’t working, you could use elastics to assist in it.
I have 4 motor 1:1 with rubber bands. But Ideally will get the motors externally geared after our next comp in a week.
I’m currently using a 5:1 four bar with one torque motor and rubber bands, It works fine but can be unreliable, which is why I’m changing it to a 7:1 ratio
Wondering if anyone has some photos? That would be wonderful
@TheLordsChipsBuilder I have a question why do you have pieces of metal cutted on a angle? And why is the piece that supposed to pick up the mobile goal bented upwards? Just curious
I think it’s bent not bented
Sorry was on my phone
The part that is bent upwards helps guide the goal into place and the part cut at an angle helps release in the 20 point Zone
That’s what it does.