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Mecanum Wheels


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#51 DLuders

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Posted 26 May 2012 - 02:11 PM

@ VASH321:  I had saved Zblj's various Lego Mecanum Wheel LDD designs on my computer (even though they no longer appear on his original Vector Racer topic or on his Brickshelf gallery).  I recognized the wheels at the video 0:27 point as being his Mecanum Wheels #3 design.  I posted his Lego Digital Designer (LDD) .lxf file and PDF Parts List on SkyDrive for you to download.   :classic:   I used Superkalle's excellent LDD Manager to create the Parts List (in Excel), which I then converted to PDF for ease of use.

Edited by DLuders, 26 May 2012 - 03:13 PM.


#52 Zblj

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Posted 26 May 2012 - 02:39 PM

View PostDLuders, on 26 May 2012 - 02:11 PM, said:

@ VASH321:  I had saved Zblj's various Lego Mecanum Wheel LDD designs on my computer (even though they no longer appear on his original Vector Racer topic or on his Brickshelf gallery.  I recognized the wheels at the video 0:27 point as being his Mecanum Wheels #3 design.  I posted his Lego Digital Designer (LDD) .lxf file and PDF Parts List on SkyDrive for you to download.   :classic:   I used Superkalle's excellent LDD Manager to create the Parts List (in Excel), which I then converted to PDF for ease of use.

Hmm Lxf works fine for me. The vector racer uesed only 6 guide wheels per whel, while the sidewinder uses 10.

#53 DLuders

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Posted 26 May 2012 - 03:02 PM

@ ZBLJ:  You're correct -- your LDD .lxf file with all three of your Lego Mecanum Wheel designs appear on your original topic post.  Your Mecanum Wheel Design #3 appears on the extreme right of your LDD screenshot picture:

Posted Image

@ VASH321: I had to adjust the PDF Parts List to account for ZBLJ's warning: "Dont forget, the first (smallest wheels) dont have rims, and the third wheels use 4 Y shaped pieces, which werent in LDD, so I had to use 2 studs long half beams arround a half bush."  Here is the adjusted Parts List for his Lego Mecanum Wheel #3:

Mecanum Wheel Number 3:
32013 Technic, Axle and Pin Connector Angled #1 (24 ea.)
3705 Technic, Axle 4L (12 ea.)
3706 Technic, Axle 6L (1 ea.)
3713 Technic Bush (12 ea.)
41677 Technic, Liftarm 1 x 2 Thin (12 ea.) [per Zblj's post]
4185 Technic Wedge Belt Wheel (Pulley) (4 ea.)
42610 Wheel 11 x 8 mm with Center Groove (12 ea.)
4265c Technic Bush 1/2 Smooth (16 ea.) (12 ea.) [per Zblj's post below]
43093 Technic, Axle Pin with Friction Ridges Lengthwise (24 ea.)
44809 Technic, Pin Connector Perpendicular 2 x 2 Bent (24 ea.)
50945 Tire 14mm D. x 6mm Solid Smooth (12 ea.)
x202 Technic, Pin Long without Friction Ridges Lengthwise (12 ea.)
44374   Technic, Liftarm Rotor 3 Blade Thin (4 ea.) [added per Zblj's post]

Edited by DLuders, 26 May 2012 - 03:12 PM.


#54 VASH321

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Posted 28 May 2012 - 07:37 PM

@DLuders: thanks for all the trouble I already build wheel 2 and 3 ;)

@Zblj: so the Sidewinder uses another wheel with 10 rather than 12 rollers?
are there detailed pictures? does it perform better than your 12 roller design?

#55 Zblj

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Posted 28 May 2012 - 08:39 PM

the 12 rollers is smoother, problem is I dont have the proper wheels  :sceptic:

#56 esrtiece

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Posted 09 June 2012 - 07:54 PM

Because ramacco wanted to build them, i have made a MlCad file of the improved design of ZBLJ Mecanum wheels. So i share them. They are super to play with.
Attached File  mecanum.zip   1.18K   68 downloads

#57 Ramacco

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Posted 09 June 2012 - 08:37 PM

I'm considering to buy the parts to build 4 of those. Via skype Esrtiece told me that number 3 are the best ones. Still not sure because the 2x2 bent pin connectors are rather expensive.. Thanks ZBLJ and Esrtiece for charing. Thanks Esrtiece for the good advice ;)

#58 DLuders

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Posted 08 August 2012 - 11:49 PM

[BUMP]

Isogawa Yoshihito posted three pictures of a Mecanum Wheel Car, and this YouTube video on his webpage.  There is enough detail that you could probably build one yourself!   :cry_happy:

  Posted Image  Posted Image  Posted Image

Edited by DLuders, 08 August 2012 - 11:50 PM.


#59 fex00

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Posted 25 April 2013 - 09:43 PM

If it would interest any of you, I have just submitted this project on Cuusoo which is for a lego manufactured mecanum wheel, possibly as an expansion kit to the upcoming ev3.

#60 timslegos

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Posted 26 April 2013 - 03:52 AM

I wish i had more of those tires, looks like it would be a  fun build.

tim

#61 aeh5040

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Posted 26 April 2013 - 05:48 AM

That's a great idea, and nicely executed.

However, I suspect this construction would not be strong enough.  The axles running through the special tires would have alot of bending force on them.  And I suspect the radial axles might have a tendency to pop out as well.

Can you find a way (within the demanding constraints that you point out) to support the tires at both ends?

#62 fex00

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Posted 26 April 2013 - 11:08 AM

@aeh5040
You are not wrong, when I make the 2nd generation I will have them supported at both ends. For a model made entirely out of a single ev3 kit, it should suffice, but that's not really good enough...

#63 DLuders

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Posted 28 April 2013 - 09:01 PM

Nexus Robot now offers a "60mm Aluminum LEGO compatible Mecanum Wheel" (the larger pictures of which are a bit too big to post here) -- "The 60mm aluminum mecanum wheel is the smallest size mecanum wheel in all of our mecanum wheels. it is a LEGO compatible mecanum wheel, it comes with an NXT compatible hub and an axle centre hub for the arduino motors and wheels. You can also use universal hubs to connect the wheels and motor. It will give you more choice, each wheel is comprised of 8 rubber rollers, these axles and rollers are sandwiched between two aluminum plates, use these mecanum wheels on your robot, it can be able to forward/backward movement, but also side to side. Using rollers set on 45 degree rotational axis parallel to the mai rotational axis of the wheel, all of you need to do is to add your drive motors, controller boards and batteries.

Specifications:

Diameter: 60mm

Width: 31mm
Number of rollers: 8

Number of plates: 2

Body Material: Aluminum Alloy

Roller Material: Ruber

Length of roller: 30mm

Net weight: 86g

Load Capacity: 3kg


Download PDF Files:
60mm Aluminum Mecanum Wheel


Posted Image


Nexus Robot also offers a "58mm Plastic Omni Wheel for LEGO NXT and Servo Motor" -- "This is a latest design of 58mm LEGO compatible Omni directional robot wheel.  It's useful as they roll freely. The 58mm plastic omni wheel is a robust, durable and double-row wheel that provides easy 360° movement with rotational and sideways maneuverability.  It comes with an NXT- compatible hub and an Axle Centre hub for the Arduino motors.  If you use this omni wheel on your robot, it can be able to [go] forward/backwards and rotate without changing its orientation.


Specifications:

Body&Roller Color: Black
Wheel Diameter: 58mm
Roller Diameter: 13mm
Body Material: Nylon
Roller Material: TPR
Load capacity: 3KG
Net weight: 60g


Posted Image




Download PDF Files:
58mm -LEGO-compatible-Omni-Wheel


Edited by DLuders, 28 April 2013 - 09:13 PM.


#64 Someonenamedjon

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Posted 28 April 2013 - 10:03 PM

The first one looks very sleek!
-Jon

#65 dimitridekyvere

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Posted 13 February 2014 - 03:23 PM

Hi everyone,

I have made a mecanum EV3 robot named "M3CANUM DOG".




Mecanum Dog is an omnidirectional Lego Mindstorms EV3 Educational robot. It uses special mecanum wheels that allow it to drive in any direction, even sideways! This movie shows some of the different driving options, mathematical functions and how to program the motor control program in LEGO's  LabVIEW code EV3-G.

M3CANUM DOG is built using one LEGO Education EV3 Core Set (45544), 2 extra EV3 Large Servo Motors (45502) and 4 LEGO Compatible Mecanum Wheels (3th party)..

Please like and leave a reply.

Thanks,
Dimi

#66 Technyk32231

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Posted 13 February 2014 - 03:24 PM

Very cool!

#67 Jim

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Posted 13 February 2014 - 06:13 PM

Very cool indeed!!

Saw the video online this week. Where did you get the Mecanum Wheels?

#68 DrJB

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Posted 13 February 2014 - 08:08 PM

View PostJim, on 13 February 2014 - 06:13 PM, said:

Very cool indeed!!

Saw the video online this week. Where did you get the Mecanum Wheels?

They're on eBay ... a set of 4, for $100 (includes free shipping from China)

#69 dimitridekyvere

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Posted 14 February 2014 - 06:57 AM

It are NEXUS LEGO Compatible mecanum wheels. http://www.nexusrobo...?id_product=122 there are several resellers:  http://www.nexusrobo...ms.php?id_cms=6

Dimi

#70 astakos

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Posted 14 February 2014 - 11:09 AM

hi,
I am a new member and would like to participate in this discussion by showing my omniwheel vehicle..
I apologize for the low video quality ..



#71 Technyk32231

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Posted 14 February 2014 - 01:35 PM

Those are cool. However, I think the Vex robotics mecanum wheels are cooler.
http://www.vexroboti...n/276-1447.html

#72 DrJB

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Posted 16 February 2014 - 04:04 AM

I did build all three tires in the original LXF file, and here is 'my' verdict:

Smallest: Ok, but shape not stable
Medium: very stable, smooth small wheels, though a bit rough when installed on a vehicle (of course)
Largest:  Does not work, due to neighboring small tires touching/rubbing. I was hoping it to provide a smoother ride than the medium size, but, again, rubber interference.

Winner: Medium Size.

View PostTechnyk32231, on 14 February 2014 - 01:35 PM, said:

Those are cool. However, I think the Vex robotics mecanum wheels are cooler.
http://www.vexroboti...n/276-1447.html

I like those as well, though the webpage does not say if they're lego compatible. In fact, they appear not as they do not have a replaceable spindle.

#73 Technyk32231

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Posted 16 February 2014 - 02:46 PM

View PostDrJB, on 16 February 2014 - 04:04 AM, said:

I did build all three tires in the original LXF file, and here is 'my' verdict:

Smallest: Ok, but shape not stable
Medium: very stable, smooth small wheels, though a bit rough when installed on a vehicle (of course)
Largest:  Does not work, due to neighboring small tires touching/rubbing. I was hoping it to provide a smoother ride than the medium size, but, again, rubber interference.

Winner: Medium Size.



I like those as well, though the webpage does not say if they're lego compatible. In fact, they appear not as they do not have a replaceable spindle.
I don't think they are, and I'll check if they have a replaceable spindle. I have some on a robot right now.

#74 DrJB

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Posted 18 February 2014 - 03:06 AM

Found a cheaper/stronger alternative than using the original designs ...

The original wheels use these parts: 44809 Those are however rather pricey ... especially that you need 24 per wheel ...

The alternative is to replace each with 6553 + 60483 . This gives not only a sturdier build, but also increases a bit the diameter of the wheel, and as such, the friction issue I mentioned in post #72 is avoided.

Edited by DrJB, 18 February 2014 - 03:06 AM.




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