Kingofjapan, when the faster motor is activated, does the slower motor still have power? It seems like it would act like a brake against the faster engine?

i thought that too...
 

orginally i was going to use a 1.6 and 3.0 combination for motors, but i had onlya 1.0 and a 2.2. the 1.0 runs a bit slower because it's dragging the 2.2 along, BUT it's fun. it's like having VTEC, the 1.0 motor is doing fine, but if it burns out, i have plenty of those. so it's not that bad. the 2.2 is a reliable motor so i can depend on it running. neither motor works at it's full potential but what can you expect out of something so revolutionary. The FET mods arereally easy to do. just grab the blank things with some pliers adn twist..tada. they're off.

BTW, they work independanly..
 

the reason that the FETs are removed is so that they run indenpedanly of each other, not at the same time. otherwise the 1.0 motor would be burnt out b/c it's being pushed over it's limit of 10000 RPM's. the 2.2 won't run at 22000 RPMS though, it has to drag the 1.0 motor's friction. oh well..

thought
 

this might be a bit of a stretch, but what about a really flexible motor mount...and when power is applied, the torque of the motor causes it's flexible mount to shift into position and mesh with the transfer gear? Just tossing ideas out.

solanoid?
 

How about a micro solanoid? Do they make really little ones? When power hits the motor, it triggers the solanoid as well and the piston in the solanoid pushes the motor into position?

Also, you could link the other end of the piston so that it disengages the other motor?

HOLY MOLY! What if you used the electro-magnetic steering concept to engage / disengage the motors?

I don't know about that..
 

the solinoid produces so much electromagentic interference i don't even know if the motor would work. But it's worth a try, if you can give me a schematic of what you are talking about. I'll try it, anything once. BTW, I've switch to a 2.2 motor and a 2.6. there is noticeable differnce in preformance as teh 2.2 motor has lots of torque. I want to get a 1.6 motor because rumour has it that it runs the new bit lar-g's and they have insane torque. even the zip zap motors would be great.....

i did the dual speed mod mention on that japanese site, and its mad. apart from the fact you cant go backwards, you gain the fuctionallity of a booster and a greater top speed. Id recomend basic electronic knoledge before attempting this mod, because somethings are not explained well enough...so if anyone has trouble understanding the translation i can probably help you out just let me know which section you don't understand...

Kingofjapan, as for the dual motor mod with a 1.0 and a 3.0, it doesnt seem feasible, a sleeper dual battery mod with a dual-speed conversion and a 2.2 would be much easier as there are no intricate moving parts and you could add a resistor to drop the speed down to a 1.0 equivalent, the price is an important factor to0, all ive spent is the price of an extra battery, and a 2c resistor.

also removing the 2 FETs does increase the voltage and it also reduces current lost as when you do the dual-speed mod the FETs are no longer used.

i didn't do it for the speed...
 

hehehe...it's nice to know that some one is still out there. Yeah i know that the two speed deal on the japanese website can be done. I just did my mod to show the youngen's what a bit charg can do. I've been playing with these things for a really really really long time. I just wanted to try something new. besides i like way gears turn, the more gears the better, It's fun! C'mon lego technic guru's unite!

thanks for the reply and can you show me how to do the two speed mod? I've been looking at the site for months and nothing. Some choaching would be great. I have a chassis already, but i need come gears that's all. thanks

Help<>2 MOTOR MOD<>help
 

wassup man! i need your help! Pleaseee, if your not too busy could you walk me through or give me a english diagram of how to do that 2 motor mod. i would be so appreciative of some of your knowledge on this. it seem that you understand alot in this mod! i was also wondering if i can do a dual battery mod with this 2 motor mod? thanx....

um my mod isn't the dual motor mod, its a dual-speed mod, which works by rewiring reverse so it makes the bit go forward, then by putting a resistor on the original fowards to make it go at a limited speed, then when you press the reverse button it "boosts" up to full speed....
I was just comparing it to the dual motor mod and showing how feasible it really is.
My bit is a dual cell sleeper, and it flys. If i get time during the week i can email you a rough translatation and additional notes on the DUAL-SPEED modification, but im very busy fixing my real car so i may not be able to till later in the week.

Ok man i'll wait... sound very intresting! by the way whats a ? i really appreciate all your help, thanx....

Esco

dual cell sleeper means that both batteries are mounted inside the chassis, for a lower center of gravity...

Deleted this message it posted in the wrong thread

it works good