42099 Mods and Improvements

[PunkTacoNYC]

6 hours ago, SNIPE said:

Heres a portal-planetary hub idea I made:

Now to work out how to add steering

 

These gears need more bracing. Any amount of torque will instantly push the gears apart, cause them to click, etc.

[Jundis]

13 hours ago, SNIPE said:

Heres a portal-planetary hub idea I made

In this gear configuration, you don't have any advantage compared to the normal portal axles.

You go in with 3:1 ration (24:8 tooth gears) and then convert back 1:5 (internal planetary gearbox) resulting in 1:1.667. The exact same ratio can be done by using normal portal axles with a 20 and 12 tooth gear.

As already mentioned, you need a sturdier design, also don't forget the friction between the gears.

[ozacek]

I was able to complete the PF base:

No modification of the frame is needed, the new base is still 100% compatible with the existing frame. Personally I don't have many panels and just about no non-technic parts, so I had to patch up a frame the best way I could:

But ater testing a bit, I think the 2.3x ratio is too low, there's too much speed and not enough torque. I'll change that to 3.8x.

I'll try finishing the instructions in the coming days.

Edited August 25, 2019 by ozacek

[SNIPE]

8 hours ago, Jundis said:

In this gear configuration, you don't have any advantage compared to the normal portal axles.

You go in with 3:1 ration (24:8 tooth gears) and then convert back 1:5 (internal planetary gearbox) resulting in 1:1.667. The exact same ratio can be done by using normal portal axles with a 20 and 12 tooth gear.

As already mentioned, you need a sturdier design, also don't forget the friction between the gears.

Well this is harder than you think.

You have to use "specicalized" parts, for example minifig utensil rings, system brackets, etc

Even bracing it better is hard due to the types of connectors needed and the fact that the 24 tooth gear catches on most parts.

I put compactness in front of rigidity.

heres a better version then:

I couldnt be bothered to find a system bracket piece but it is essential that it has one.

 

Edited August 24, 2019 by SNIPE

[ozacek]

On 8/24/2019 at 9:09 AM, ozacek said:

I'll try finishing the instructions in the coming days.

Do people usually have V2 receivers? I'm not sure whether I should be making the instructions with 1x V2-receiver or 2x V1-receiver.

[johnnym]

2 hours ago, ozacek said:

Do people usually have V2 receivers? I'm not sure whether I should be making the instructions with 1x V2-receiver or 2x V1-receiver.

Hm, don't know the statistical distribution, but I for myself have three V1 and one V2 receivers (so 3:1). In my 8081 mod I use the V2 for drive (PF XL) and a V1 for steering (PF M) and PTO (PF M). So why not power both PF XL motors from a V2 and the PF servo motor from a V1?

[ozacek]

1 hour ago, johnnym said:

So why not power both PF XL motors from a V2 and the PF servo motor from a V1?

If I'm to use a V2, I can power all 3 motors through it, that's what I'm doing currently. But I'm thinking, maybe many people don't have a V2, that's why I was hesitating. But now I'm thinking, most people who get into MOCs must have a huge parts collection, otherwise they wouldn't get very far... so that's settled then.

Edited August 27, 2019 by ozacek

[Jundis]

Just regarding the 42099: Does anyone know, when the single parts are available on bricklink and also stud.io?

[Void_S]

9 minutes ago, Jundis said:

Just regarding the 42099: Does anyone know, when the single parts are available on bricklink and also stud.io?

Well, they are here, at BrickLink already:

• 
  Technic, Steering Axle with 2 Pin Holes, 2 Axle Holes and 2 Ball Joint Arms with Dark Bluish Gray Wheel Hub (46490 / 92909)
• 
  Technic, Steering CV Joint Axle, Wide
• 
  Technic, Steering CV Joint, Large Ball

[Mechbuilds]

6 minutes ago, Void_S said:

Well, they are here, at BrickLink already:

• 
  Technic, Steering Axle with 2 Pin Holes, 2 Axle Holes and 2 Ball Joint Arms with Dark Bluish Gray Wheel Hub (46490 / 92909)
• 
  Technic, Steering CV Joint Axle, Wide
• 
  Technic, Steering CV Joint, Large Ball

They're only 7 euros a pop there.. 
Go search in brickowl and people are asking for 21 euros a pop. 

Insane

[Jundis]

2 hours ago, Void_S said:

Well, they are here, at BrickLink already

Ah, thank you! I just looked for the parts list in the 42099 ("Item Consists Of") , which is still missing.

Ok on brickmerge, there are some shops with already 30% off the model... hmm... 

[Void_S]

4 hours ago, Mechbuilds said:

They're only 7 euros a pop there.. 
Go search in brickowl and people are asking for 21 euros a pop. 

Well, they have increased in price at BL, to be honest 

[ozacek]

Getting there..

[ozacek]

By any chance, is there anyone who knows how to do cabling in MLCAD projects (with LSynth I assume), and is willing to do it for me? If you do, please message me. 
Otherwise I'll just leave the instructions without any cables and it will be up to the builder to figure it out.

Edited August 30, 2019 by ozacek

[Eaglefan344]

How easy is it to add lights to this thing? 

[suffocation]

Downloaded the instructions and threw the model together using Power Functions, custom planetary hubs and a livery born of pretty bad colour-blindness.

 

[Maaboo the Witch]

How does it perform?

[suffocation]

Haven't tried yet but I assume it sucks donkey balls.

[Maaboo the Witch]

32 minutes ago, suffocation said:

Haven't tried yet but I assume it sucks donkey balls.

'Cos if it performs better, the only advantage left for CONTROL+ is range.

[suffocation]

In terms of sheer climbing ability my version should, in theory, perform better due to the shorter drivetrain and increased torque. Then again, there's the ridiculous amount of friction generated by the custom planetary hubs, which are as efficient as chiseling the Parthenon Marbles with a petrified turd.

[suffocation]

Had a go on a 40° ramp. Pretty scary how it's able to roll back in spite of the hubs and the XLs.

 

Edited August 31, 2019 by suffocation

[ozacek]

I've now finished the instructions for the PF base and they are available on Rebrickable:

rebrickable.com/mocs/MOC-28766/olivierz/4x4-x-treme-off-roader-42099-power-functions-base

[johnnym]

2 hours ago, ozacek said:

I've now finished the instructions for the PF base and they are available on Rebrickable:

rebrickable.com/mocs/MOC-28766/olivierz/4x4-x-treme-off-roader-42099-power-functions-base

Cool and much obliged! BTW, the photo showing the cabling is a very good idea.

I made a PDF out of your PNGs. It's available from https://bricksafe.com/files/johnnym/mods/42099/ozacek/42099-PF.pdf if you'd like to use it on Rebrickable.

[ozacek]

2 hours ago, johnnym said:

I made a PDF out of your PNGs. It's available from https://bricksafe.com/files/johnnym/mods/42099/ozacek/42099-PF.pdf if you'd like to use it on Rebrickable.

The reason I don't use PDFs is because I find they lower the image quality. My images are pristine lossless PNGs, and I find after making a PDF we see image compression artefacts.

Edited September 1, 2019 by ozacek

[johnnym]

6 hours ago, ozacek said:

The reason I don't use PDFs is because I find they lower the image quality. My images are pristine lossless PNGs, and I find after making a PDF we see image compression artefacts.

I assume this depends on the tool and/or the configuration. The size of the PDF is indeed smaller than the aggregated size of all the distinct PNGs but I didn't see any obvious signs of image compression when quickly scanning through it just now. Checking the PDF for the used compression it looks like each page/image (or maybe the whole file) is ZIP-compressed. I used ImageMagick's convert tool to generate the PDF from the PNGs and used the following command line (using the configured defaults):

convert *png 42099_PF.pdf