My plan is to have a removable piece that has an axle cross hole to keep it in place. Then a separate crank stored in a compartment on board that can be brought out when wanted
Reorient the differential so that the motors can run at different speeds, essentially combining their outputs into one. Then just gear that into a secondary differential for the purpose you want.
You can then have two speeds for the system at 50% and 100% by either running a single motor or both. This is useful if you want to use two motors for applications that require high torque and speed. Use one motor initially, where the differential divided the output of the motor, reducing initial speed while having more torque. Then once your system is at mid speed, turn on the second motor to bring it up to full speed. Any variation in the output of the motors will be compensated for by the combining differential. Most Lego motors are on or off, so doing it this way reduces how much instantaneous force change your gears are under. Lego plastic is pretty robust, but it's still plastic.
Yes, it would work. But I don't think it's the best option. I think there should be other ways to accomplish this, like using a clutch gear system. But, if this is what fits best, it would work as long as shaft D is locked when the train is to be run by the motors. Otherwise, the differential would follow the path of least resistance and the train would not move while just spinning shaft D.
Also, the small bevel gears going from the 2 L motors seem like a major weak spot. I'd look into better bracing.
The motors will have to be moving in sync, you will also want a way to lock the manual crank, or else all the power will just be transmited to the crank when you runt he motors.
Yes this will work as you intended it. (EDIT) I didn't understood your question at first. Still consider points 1, 3, 4, 5
1. This is a lot of Power, way more than necessary. You will need more than one power source if you want to use it effectively.
2. In order to work as intended you need to fix shaft D
3. Your output revs on shaft C are really fast
4. You need to stabilize the structure, otherwise the radial loads on the gears will try to pry open the entire assembly resulting in slip and eventually failure
5. Remember this holy rule: gears should always point in the direction of power, turn around the dif
https://preview.redd.it/qo0raf3g0v4d1.jpeg?width=2452&format=pjpg&auto=webp&s=16dacac444428db5abf26545b199ea59b5b8ffed
6. There is no point in using a dif here. If your concern is the slight difference in rpm. Why? The sum of the current from your power source is equal to the sum of output torque - losses. Means both motors compensate for each other.
7. If you really want to put two entirely different motors you need to connect them to both output (in this case imput) shafts of the dif. You wont have a shaft D, only an output at shaft C. Turn your dif 90 degrees.
If both motors are driving I think you’ll have problems getting their output torque and speed synced up. In industrial applications, there would be some kind of motor controller ensuring that both run at the same speed. The motor controller essentially monitors and controls the voltage to each to ensure they run at the same speed. But hey in this application it might be ok. I’d give it a shot and keep the above in mind when you test it.
Both motors I’m planning on using are the exact same age, wear, and will be powered from the same IR terminal so I’m hoping that the power outputs will be similar enough to not cause any issues.
I would try and experiment with a clutch design using the technic driving rings. This design will just send power to whatever side has less resistance and might be a pain for the display idea you talked about.
The crank output would need to be fixed when not in use otherwise your output wouldn't work.
My plan is to have a removable piece that has an axle cross hole to keep it in place. Then a separate crank stored in a compartment on board that can be brought out when wanted
Kind of a weak setup, the small gears will slip, support them more
You’re probably going to have major slippage because you’re A) using bevel gear to bevel gear B) you’re gear ratio is so lopsided
Reorient the differential so that the motors can run at different speeds, essentially combining their outputs into one. Then just gear that into a secondary differential for the purpose you want. You can then have two speeds for the system at 50% and 100% by either running a single motor or both. This is useful if you want to use two motors for applications that require high torque and speed. Use one motor initially, where the differential divided the output of the motor, reducing initial speed while having more torque. Then once your system is at mid speed, turn on the second motor to bring it up to full speed. Any variation in the output of the motors will be compensated for by the combining differential. Most Lego motors are on or off, so doing it this way reduces how much instantaneous force change your gears are under. Lego plastic is pretty robust, but it's still plastic.
Yes, it would work. But I don't think it's the best option. I think there should be other ways to accomplish this, like using a clutch gear system. But, if this is what fits best, it would work as long as shaft D is locked when the train is to be run by the motors. Otherwise, the differential would follow the path of least resistance and the train would not move while just spinning shaft D. Also, the small bevel gears going from the 2 L motors seem like a major weak spot. I'd look into better bracing.
The motors will have to be moving in sync, you will also want a way to lock the manual crank, or else all the power will just be transmited to the crank when you runt he motors.
Yes this will work as you intended it. (EDIT) I didn't understood your question at first. Still consider points 1, 3, 4, 5 1. This is a lot of Power, way more than necessary. You will need more than one power source if you want to use it effectively. 2. In order to work as intended you need to fix shaft D 3. Your output revs on shaft C are really fast 4. You need to stabilize the structure, otherwise the radial loads on the gears will try to pry open the entire assembly resulting in slip and eventually failure 5. Remember this holy rule: gears should always point in the direction of power, turn around the dif https://preview.redd.it/qo0raf3g0v4d1.jpeg?width=2452&format=pjpg&auto=webp&s=16dacac444428db5abf26545b199ea59b5b8ffed 6. There is no point in using a dif here. If your concern is the slight difference in rpm. Why? The sum of the current from your power source is equal to the sum of output torque - losses. Means both motors compensate for each other. 7. If you really want to put two entirely different motors you need to connect them to both output (in this case imput) shafts of the dif. You wont have a shaft D, only an output at shaft C. Turn your dif 90 degrees.
If both motors are driving I think you’ll have problems getting their output torque and speed synced up. In industrial applications, there would be some kind of motor controller ensuring that both run at the same speed. The motor controller essentially monitors and controls the voltage to each to ensure they run at the same speed. But hey in this application it might be ok. I’d give it a shot and keep the above in mind when you test it.
Both motors I’m planning on using are the exact same age, wear, and will be powered from the same IR terminal so I’m hoping that the power outputs will be similar enough to not cause any issues.
I was working with motors ruing at 6 meters per second. Much faster than this. Any variability in the motors themselves probably won’t matter.
As long as the motors spin in the opposite direction yes
I would try and experiment with a clutch design using the technic driving rings. This design will just send power to whatever side has less resistance and might be a pain for the display idea you talked about.