I just watched your latest video. If you can't get a mechanical linkage to work, a solution simpler than the NXT might be to link two s together.

One big problem with that, to produce enough current from one to drive the other direct you need to move it faster than a trailer will turn, and it also creates cogging as the magnets pass the coils, you can do the same thing with 2 NXT motors direct connected but it dont work at slow speeds.

I have been in touch with a company called mindsensors who have got back to me with details of their rotation sensor that is almost frictionless but can output degrees to the nxt brick, hopefully when that is available i will be able to create a working design.

@ Rodeown: Are you talking about the new Mindsensors.com GlideWheel-M rotation sensor, discussed in this TechnicBRICKS article ?

"According to the pre-release information available from mindsensors.com, there will be three versions available of this:

•One model will allow to connect PF motors to NXT motor port.

The encoder support enables precise control (1 degree precision).

•Second model will be similar to the first one, but for use with old RCX motors.

•Third model will be a digital angle sensor, to measure angles with 1 degree precision."

@ Rodeown: Are you talking about the new Mindsensors.com GlideWheel-M rotation sensor, discussed in this TechnicBRICKS article ?

"According to the pre-release information available from mindsensors.com, there will be three versions available of this:

•One model will allow to connect PF motors to NXT motor port.

The encoder support enables precise control (1 degree precision).

•Second model will be similar to the first one, but for use with old RCX motors.

•Third model will be a digital angle sensor, to measure angles with 1 degree precision."

Yes that is Correct, just the ones i was talking about, I emailed the company to ask em when available and what price and they have asked me which one i would prefer, now awaiting their answer.

Well this is the start of my Truck and Trailer, it will be my second moc so dont expect amazing things. i will do what i can and with the help of you technic wizards should be able to solve any problems on the way

(excuse the bad video looks like youtube messed it up with antishake thingy)

Would you and others that are linking to youtube video's. Please be so kind, as to renember to allow the more advanced embedding of the YT player, when you are generating the embed Html v. x?

The reason ease that I know from other embedding site, that sometime if the embed player allows it, it fallback from flash to Html5 video tag with, mpeg 4/h.264 instead. And that is very useful. I would gues that if you has turn ads on for your videos that then html5 will not be and option right now, but I think youtube is working on it. Else see http://www.youtube.com/html5. Also a direkt link to your video is here

with a nice webm or h.264 rendering codec instead

@ Rodeown: This Bot Bench article on the upcoming Mindsensors Glidewheel-M says "The GlideWheel-M will cost $29.95 when it goes on sale."

Xander wrote, "The mailman brought me a cool new toy to play with this afternoon! It’s the Mindsensors GlideWheel-M! These are so cool, you can now use the Large XL Power Functions motor with the same degree of accuracy as an NXT motor. The GlideWheel-M is just a single unit thick and fits very nicely onto the motor. You can mount it in any orientation you like. It’s really easy to use; if you know how to use an NXT motor, you can use this."

In response to some of the comments there, he added "It’s acts as an encoder but I think it uses the same technology as the upcoming angle sensors they’re planning to release with a similar package....just use them as a regular motor. Easy as anything!

Edited June 3, 201212 yr by DLuders

I had a reply from Deepak Patil at mindsensors... this is as he wrote it..

About Angle Sensor -

The GlideWheel-AS angle sensor (which would go on the Sensor port) doesn't

seem to be economically viable product (so we are debating what to do, we

will probably put it on back burner, and do it later).

But the current design of GlideWheel-M can be used as angle sensor on Motor

port, if you need one.

about release date -

we are currently doing beta tests, and results are promising, but there are

few concerns which we want to address before we make final product.

So all in all, I think it will be mid-July for the production ready product.

Regards.

So looks like i am no further forward well maybe but it will be a compromise.

Edited June 4, 201212 yr by Rodeown

Did a colour sensor test for the rear steer once i have printed a colour bar on my pc it will be okay i think.