Let's Make Robots!

Rover 5 tracked robot chassis with adjustable clearance


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Chassis_size.jpg195.69 KB
Rover5_Arduino.zip4.11 KB
Vendor's Description: 


Rover 5 is a unique and powerful  tracked chassis designed by OddBot and produced by DAGU.

Specifications:

Motor rated voltage: 7.2V
Motor stall current: 2.5A
Output shaft stall torque: 10Kg/cm
Gearbox ratio: 86.8:1
Speed: 1Km/hr
Encoder type: Quadrature
Encoder resolution: 1000 state changes per 3 wheel rotations

Tips on using the encoders with sample code can be found here: http://letsmakerobots.com/node/24031

Video indoors autonomous: http://v.youku.com/v_show/id_XMjE5NzkwODA0.html
Video outdoors RC mode: http://v.youku.com/v_show/id_XMjIwMTkxODk2.html
Video mecanum wheels:  http://v.youku.com/v_show/id_XMjI2MDAwMDEy.html

Unlike conventional tracked chassis's you can adjust the clearance. Strechy rubber treads maintain tension as the clearance is changed.

The standard chassis comes with two motors and gearboxes. Each gearbox has an optical quadrature encoder with a resolution of 1000 state changes per 3 revolutions of the output shaft (333.33 pulses per revolution).

The chassis can be upgraded to 4 motors and gearboxes with encoders making it ideal for mecanum wheels such as those produced by FINGERTECH.

The chassis is compatible with Pololu's expansion plates for the RP5 chassis. These plates are ideal for mounting hardware on the chassis.

The gearbox angle can be changed in 5 degree increments and adaptors are available allowing standard RC car wheels to be fitted.

Currently we have a PCB designed to allow Arduino development boards (not included) Diecimila, Duemilanove, Nano and Mega to mount easily on the chassis. This PCB includes power supply, motor drivers with current sensing, IR sensors on each corner, 2 small breadboards, a pan/tilt kit with our IR compound eye and a large prototype area under the breadboards where custom circuitry can be fitted.

The photo below and video show the robot using an Arduino Mega which is not part of the kit.

See the attachments for basic dimensions and autonomous sample code.

 

 

 

 

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For now our standard stock will be white only. Distributors may choose to get it molded in other colours.

When I looked at this initially, I thought the clearance could be changed on the fly via servos or something. But now that I look at it more closely, it seems more likely that it is purely a mechanical setting. Is that so?

I had considered trying to set the chassis up with suspension which would have allowed servo control as you mentioned. Unfortunately it would have required more parts, more molds and a higher cost.

To be honest I think most people will probably prefer the chassis in a raised position unless they need it to be low to get under furniture.

In the future if the chassis sells well enough we might consider developing an upgrade kit.

Yeah,that's understandable.Would have been cool, though.

Still an awesome chassis. I'm looking forward to seeing some robots built on it.

Wow! Great design, OddBot. I love how flexible you have made this one. It seems really well thought out.

Including the built in encoders is awesome!

I just rechecked the encoder resolution. It is double what I had previously thought. Now 1000 pulses for 3 revolutions of the output shaft!

Loving the Oddbot touch. Heck, this design has got your signature all over it!

Is this available yet? Hmm, I guess still developing? This has great possibilities. My first arty bot wanty!

Soon , very soon

I love that chassis. Any idea on price yet?