Leonard Goldstein

[MOC] Mini-Skidder: Woody and the woodpicker

Recommended Posts

Hi,

another Mini-MOC for you: here comes the Mini-Skidder :wink:

800x600.jpg

800x600.jpg

800x600.jpg

800x600.jpg

 

This little thing is very powerful as it uses 2 L-Motors for drive and a third L-Motor for steering. Watch the video:

 

On my brick safe page you can find the pics in higher resolution and of course an LDD-File:

https://bricksafe.com/files/Leonard_Goldstein/woody_and_the_woodpicker/Woody-Woodpicker_V02.lxf

 

Let me know what you think :classic:

Regards

Leonard Goldstein

 

 

Share this post


Link to post
Share on other sites

Very nice! The functions are outstanding! I am very impressed with how compact it is.

The subtractor is very nice, the subtractor your design yours?

Andy D

Share this post


Link to post
Share on other sites
2 hours ago, TechnicRCRacer said:

This is awesome! So small, yet super functional! Also very strong. One of your best MOCs:thumbup:

 

50 minutes ago, Andy D said:

Very nice! The functions are outstanding! I am very impressed with how compact it is.

The subtractor is very nice, the subtractor your design yours?

Andy D

 

Many thanks! As you can see in the picture below there is almost no framework inside - the two L-Motors are the framework. And the subtractor (my own creation :classic:) is a little bit special:

  • first there is no differential to split the power flux
  • instead of this there is a separate motor for each side (gives more power, too)
  • the differential of the steering is arranged in a special way: one bevel gear is connected to the steering motor
  • this means if you drive the housing of the differential the opposite bevel gear is running at a double speed
  • to compensate this the housing is driven by a 12T (=> 12:24 gives halve the speed).

As a result both tracks run at the same speed as the steering motor is off. There is only a little disadvantage: when steering the tracks of course run in opposite direction - but not at the same speed ... (does not really influence playability :wink:).

Regards 

Leonard Goldstein

800x494.jpg800x494.jpg

40 minutes ago, degenerate said:

Beautiful MOC and presentation!

Performance looks very good, packs a good punch in a compact and elegant package :classic:

Thanks, I did my best :sweet:

It was quite tricky to build some bodywork around all this powerfunctions (there are more PFs inside than in the 42030 ...)

And there was another problem: the two driving motors have to run in opposite direction. But they have to be connected to the same channel (as there are only 4 channels). This means a switch (8869) is needed. This switch is soooo big and there was absolutely no space left. The solution was easy: make the switch part of the interior and now it is some kind of a central console.

Regards

Leonard Goldstein

Share this post


Link to post
Share on other sites

An impressively compact and yet highly functional MOC, with excellent performance. Very well done! How did you manage to hide all the cabling?

Share this post


Link to post
Share on other sites
2 hours ago, Jody Meyer said:

This is such a great build. Nice little video as well :thumbup:

 

Just now, ColletArrow said:

An impressively compact and yet highly functional MOC, with excellent performance. Very well done! How did you manage to hide all the cabling?

Thanks again :sweet:

The cable routing was indeed challenging. On the first try I wanted to place the sbrick between the seats inside the cabin. This did not work at all - the whole cabin was filled up with cables. But at the backside there was some space left between the two M-motors (see the picture above). I put the sbrick upside down between these motors and with a little pressure all the cables could find place. They are gushing a little - what you can see on the last pic of my first post. This is a familiar problem: my Highflyer of  [TC12] was even worse ...

The woodpicker is great fun to play with. Very powerful and the steering works great. In comparison to the 42065 I think it would win the race. The only thing I do not like so much is the handling via touchpad. The feedback of a hardware device is missing. Please Lego: there are so many cool solutions (sbrick, buwizz) out there. Why not developing an OEM-solution to update this IR from last millennium?

Regards

Leonard Goldstein

 

Share this post


Link to post
Share on other sites

Dear Goldstein,

ONE question, I used CADA 4 channel battery try to re-build this model, but I found it is need 5 control channel

TWO drive channel must separate and must reverse, otherwise this model can not work run...

Does  SB have more channel?

Edited by superdog

Share this post


Link to post
Share on other sites

sbricks have 4 control channels, but you can configure an interface to control multiple sbricks at the same time.

Share this post


Link to post
Share on other sites
4 hours ago, superdog said:

Dear Goldstein,

ONE question, I used CADA 4 channel battery try to re-build this model, but I found it is need 5 control channel

TWO drive channel must separate and must reverse, otherwise this model can not work run...

Does  SB have more channel?

Hi @superdog,

you're right: there are 5 motors. But you can use one channel for both driving motors if you use a switch (8869) to reverse one of it ;-)

You can see the switch on the first pic of this topic in the middle of the cabin.

 

Regards

Leonard Goldstein

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.