linear motion needed , indepentantly for 6 axles

[SNIPE]

hi,

i need a way to push and pull each axle and it needs to be small, my gearbox is4x3x studs and it can be used as a center dif too (aka as two gearboxes, one for the front and one for the back wheels.

can you put a motor on the back of the LEGO linear actuator (i only use LEGO parts, nothing else

if so then that might solve the problem.

i only need about 3 or 4 millimeters of stroke.

if i use an actuator, i can use a IR sender and use a lego IR remote so control it all, i am not going to bother with lego battery packs, i can use the lego train terminal cables to hook to each end of the battery then attach them to a plate which has the metal tabs then on the opposite side of the plate, i can attach the PF or technik cable to the motor.+ir transmitter/receiver.

however this will take up loads of room as well has these large actuators, batteries, motors, and wiring so i dont like the sound of this idea also.

any other help will be good

Edited May 25, 2011 by SNIPE

[allanp]

Maybe you could try the new mini LA's or pneumatics.

[Alasdair Ryan]

A small la then a pf moter might be best for the job.

[SNIPE]

the new actuator does not look good for what i need as it has the wrong attachment and two mount arms which will get in the way, also i don't know if this can be operated with a motor where the motor spins and the actuator operates.

i am thinking of forgetting the idea and just sticking with the box as it will either be hard to operate the box if i is setup like a real gearbox since the car has a door and doors

here is the photo i forgot to upload:

there is 6 axles since they are separate and not going right the way through the box.

Q: what is the smallest LEGO motor they make (official part)

i could always mount the motor with a gear rack and link all the motors up to NXT key fob transducer which is then sent to a remote control.

if this possible?

Edited May 25, 2011 by SNIPE

[bord4kop]

...

Q: what is the smallest LEGO motor they make (official part)

A: this one:

Micro motor

But it isn 't very powerfull and quite hard to find..

[Lego Otaku]

The smallest LEGO motor is also the rarest one as well, a tiny red motor that fits in a 2x2x2 brick area. It's also extremely slow, something like 20 or 30 rpm.

The next smallest motor would be around 4x4x3 space and comes in 2 speed flavor. Faster one has weak torque, and other has strong torque but lower RPM.\

PF 'M' motor would be the next smallest motor and is currently in production so you could get it new easy.

[SNIPE]

what connector does the red motor have and can you post a pic of the second motor.

[garson]

what connector does the red motor have and can you post a pic of the second motor.

it has a 9v connector on the back

[SNIPE]

i mean m stud, axle or cross hole or round hole or peg or peg hole or hose/thinner axle or hose/thinner axle hole

[Blakbird]

i mean m stud, axle or cross hole or round hole or peg or peg hole or hose/thinner axle or hose/thinner axle hole

It has a small pulley. You need to use a belt or rubber band to transfer power from it normally. There is also an axle slot on the pulley which has been used to direct drive low torque applications such as a fiber optics unit, but the pulley would just slip for any high torque application.

[SNIPE]

It has a small pulley. You need to use a belt or rubber band to transfer power from it normally. There is also an axle slot on the pulley which has been used to direct drive low torque applications such as a fiber optics unit, but the pulley would just slip for any high torque application.

hmm on the pic is has what looks like a black disk with one stud on it

i was thinking about using the 8 tooth gear and a worm gear with this motor to push and pull a 3L axle which is loosely meshed with a winding drum that is used for a clutch and internal gear. (see green clutches in picture below

they is a cross hole in the middle of the clutch which allows it to turn with the axle but also slide along , OR let the axle slide along.

the actual cross hole section of the overall hole is only like 1mm wide, which is even less that the technic bushes. but still, it is practical for fast switching of axles since less of the axle nan be meshed into the cross section.

note that i only need about 4 or 5mm of stroke from each axle.

i just need to figure out a way to get 6 channel IR transmitting and receiving while keeping space minimal but i guess that's for another thread.

not even sure if i will control them wirelessly yet anyhow, maybe just some switches will be more practical.

Edited May 25, 2011 by SNIPE