[MOC] Class Xerion small - lxf and io added

[Jurss]

TC19 entry not finished, but I got those small tractor tyres, anf of course, I need to build that Class Xerion

This is the size

It is pretty small. 4x4 seems impossible. Maybe some 2 steering modes, but not shure.

This is how it scales. It is already littlebit wider, but there is still almost no space for something.

Finish in page two with more pics

29.01.2022. Added digital files. Engine is littlebit different, than in real model.

IO file https://bricksafe.com/files/Jurss/classxerion_small/xerion_small.io but with baloon tires, as stud.io doesn't has small tractor tires

LDD file https://bricksafe.com/files/Jurss/classxerion_small/xerion_small.lxf 

for lxf parts pack from [KEY TOPIC] LDD New Parts - LEGO Digital Designer and other digital tools - Eurobricks Forums could be needed

Edited January 29, 2022 by Jurss

[Jurss]

@nico71 did You just made this for me? :)

 

 

This could be then steerable axle, in scale more closer to what is needed

Ackermann geometry

[1gor]

That is a tempting project. Looking forward 

[Jurss]

13 minutes ago, I_Igor said:

That is a tempting project.

Yes, I realised it, when I scaled it :) and I was thinking, why noone has did it already? At least, I can find anything.

[1gor]

15 minutes ago, Jurss said:

Yes, I realised it, when I scaled it :) and I was thinking, why noone has did it already? At least, I can find anything.

I personally have decided to make all my models in the same scale. To determine what scale I was studying this based on tires available from LEGO...so that small tires I can only use in one that harvester and one telehandler to fit my chosen scale (1:15)

[Void_S]

1 hour ago, Jurss said:

Ackermann geometry

Looks great, but afraid it won't work very well with crab steering mode. For this scale I still would use the straight parallelogram geometry.

However, nice and compact axle!

[Jurss]

34 minutes ago, Void_S said:

For this scale I still would use the straight parallelogram geometry.

Yes. I didn't thought about that. But I'm just starting, and chassis is so narrow, I'm afraid, I won't put there those 3 modes.

[chlego]

16 hours ago, Jurss said:

@nico71 did You just made this for me? :)

Haha! I was going to suggest you check out this, but apparently, it has already been seen!

Looking forward to this!

It's normal that the tractor is too wide: these tires are more large compared to the height than the real ones, so yeah, don't worry 'bout that.

[Jurss]

27 minutes ago, chlego said:

Haha!

Most interesting was, that I yeterday created this topic, then wen't to Youtube to check what's there new. And I see this video, I thought, that Youtube started to read my mind, but it was just new video.

29 minutes ago, chlego said:

It's normal that the tractor is too wide:

Not the tires, but distance between them. For that scetch it was one stud too wide, now with that axle it is already OK.

[Jurss]

Made some steering system. It is pretty OK, but in need it lower. I can't add cabin now with its rotating mechanism. And cabin starts at the level of top of wheels. I need different solution.

 

[Maaboo the Witch]

39 minutes ago, Jurss said:

Made some steering system. It is pretty OK, but in need it lower. I can't add cabin now with its rotating mechanism. And cabin starts at the level of top of wheels. I need different solution.

The cab doesn't have to rotate - it only does that on the VC model.

Why not do the Saddle Trac?

[Dyen]

Hey, nice one! I am creating something similar for set 42122 :) also with 3 mode steering and plus rotating cab like in 42054 set 

[Jurss]

11 hours ago, Maaboo35 said:

The cab doesn't have to rotate

I wanted to put there some functions. Make it really more like small 42054.

Anyway, to switch steering modes, I need to lift that liftarm, and then I need clearence for one stud. And that is already over top of the wheels. OK, if the cabin would be fixed, then I could hide it under the cabin, form sides it would look OK, but I don't like that idea. At least, for now. I will try to find another idea. I have one (some central steering axle, which slides back and forward, and then have 2L liftarms, which engages with steering mechanisms), but still have some questions, how to make it usable - how to fix positions. @nico71 approach is not OK for this, as that switching mechanisms is pretty large, it also makes rotating cabin impossible.

9 hours ago, Dyen said:

also with 3 mode steering

Interesting, what kind of mechanism are You planning?

Edited January 25, 2021 by Jurss

[Jurss]

Project not forgotten.

Tried different chassis, based on axles. Also created new steering system.

Steering modes can be switched by changing postition of that 3L axle with stop/pin. Steering system is still too big. Also rear turns on one side not so much as to other.

To make it littlebit more compact, these could help

but don't have them yet.

[1gor]

Not the cheapest sets have this gear (28 tooth double bevel)

https://www.bricklink.com/catalogItemIn.asp?P=46372&in=S

[Jurss]

Yes, that's why I ordered them separately. They are available for under 1EUR. But still not shure, if they will help ...

[1gor]

32 minutes ago, Jurss said:

Yes, that's why I ordered them separately. They are available for under 1EUR. But still not shure, if they will help ...

I have 2 of them, but I'll spent them probably on terratrac Lexion or Jaguar...currently I wait to see what size will be tires on Zetros to plan further MOCing. You gave me idea to make smaller telehandler with those gorgeous Jeep tires that you use on small Xerion

[Jundis]

Great to see the progress, I am really interested in the mechanics in the front and rear. As there is little space for a linear actuator, wormgears are the way to go I think.

By the way: On B&P the 28 tooth bevel gear is 0,75€.

[Jurss]

3 hours ago, Jundis said:

wormgears

Don't know, haven't thought about that.

3 hours ago, Jundis said:

On B&P

 This service is not available in my country, even it is in EU and NATO :)

[1gor]

21 minutes ago, Jurss said:

 

 This service is not available in my country, even it is in EU and NATO :)

I know the feeling

[Jurss]

Stuck with other (long) projects. Returned to this, as I remembered, that I have those new 28t gears.

Created prototype

Again, it is hard to put it between wheels, so one of axles prototypes

as I needed to free space close to axle, to put there gear

Then I realised, that I need to reverse steering for front axle. I used axle as one of gears. And then there's prototype

Axle connect really good with that 28t gear, it is somehow illegal, but it works

Put first full chassis together

and then there I see issue. I tried to downgear front, but it was not enough.

So I need to connect those 28-20-28 gears directly, and then try to somehow reverse steering for HOG.

If someone noticed, in last prototype I used flip-flop beam, but I can't use it in model, as there is 4L distance between 28t and 20t gears.

 

[Jurss]

Final steering system, and yes, there is also working steering wheel in cabin

Idea of rotating cabin was abandoned.

Now it is evening and I don't have photostudio, so some prelimanary pics.

All 3 steering modes

Yes, steering is not perfect, as there is play in gears and other parts of steering mechanisms etc. But it works. Steering modes are changed by changing position of that axle with red bush. Littlebit trickier as on original.

I made also openable hood

This part  to connect counterweight and front lights is used by purpose, so that front hood could fall in that hole, and it is not horisontal.

 

[Maaboo the Witch]

Very cool! The tan gear atop the cabin looks a bit out of place, but you could swap it for a black one. There's even a white version that would look great!

[1gor]

That is how Lego mini Xerion set should look like 

There is also this connector in white (for roof)

https://www.bricklink.com/v2/catalog/catalogitem.page?P=22961&idColor=1#T=C&C=1

[Jurss]

57 minutes ago, Maaboo35 said:

but you could swap it for a black one.

Thnak You! Somehow for me seemed better, as it not stand out.

12 minutes ago, 1gor said:

That is how Lego mini Xerion set should look like

Thank You! I think I did my best.

12 minutes ago, 1gor said:

There is also this connector in white (for roof)

It looks, that I have two of them, they are just in set, which I recently built, so I didn't found them.