Zerobricks

We are working on adding more functionality to the center-steer module and the gearbox module. I should have an internal version of the application soon which I will use to set up the best default steering parameters for various official models. Parameters like initial center steering power (PWM) PID values of the controller and more.

I think having the tracks driven by the top gear might end up in tracks skipping due to a lower contact area/angle. Also I think the Lego's drive sprockets teeth are much more rounded than the real ones.

I used a simillar idea some 10 years ago: I also used a simillar technique when motorizing the 42125 and for the big Trophy truck designed. For the trophy truck I used pulley wheels and a 57585 connector just like in the above photo.

Nothing to chew up, the large angular motors are driving the planetary hubs which are driving the lower rear sprockets.

What BuWizz are you refering to? BuWizz 2.0 can provide around a total of around 5A at almost 11V. BuWizz 3.0 max current is 7A at over 12 V. I regulary reach over 3A per PF port while testing my models on my BuWizz 3.0.

Good idea driving the diff from both sides. Does the fact both 12 tooth gears are not totally aligned cause any issues? I meanwhile managed to add 2x BuWizz motors which drive the new, stronger central diff instead of 4 studded long one. I also managed to squeeze in a half pin based online 6 engine driven by the motors under the hood. The mod should increase speed by some 3x times at simillar torque.

I think just one, still thinking if I should replace original drive motors too.

I don't understand the question?

Looking good, the only thing I would suggest is to rotate the 9 and 11 stud long white beams under grill to be in the same orientation as the grill so you have a smoother surface.

Found a way to redesign the axles for following improvements: Increased ground clearance under both axles Increased steering angle (by a few degrees) Improved gear meshing on the rear axle with the use of 7x11 frames, so it shouldn't be able to slip out anymore Reduced number of gears on the rear axle drive. I already build the sketches of the axles, only waiting for the set now. And of course I will add a BuWizz 3.0 on top for more power

While it looks good in theory the differential is lacking support and where the 8 tooth gear and diff meet is a weak point which will slip at any higher torque. Did you try blocking the diff?

I think it could be useful for easier insertion from the outside inwards. Currently you have the build in correct order - beam, beam, pin,beam, but now you can just insert the pin in the end.

Please understand I'm here to provide support for the issues and that I'm not the person in charge of the team. I sympathize with the issues, and as mentioned before I would like to see all the things implemented and working. Trust me, I am working hard and pushing to have them fixed almost every day, but it involves a lot of external factors we can't control. Regarding release, if we delay the product a few months to polish it, people are unhappy. If we release it without full support, people are unhappy. There is simply no way to please everyone. Regarding gamepad support, there is no gampead available which supports BLE, so we can't directly support it, but only via a third party app.

Please understand that currently lots of people are on holidays, I just returned from a 2 week long work-related trip Also understand that we are a very small team trying our best, you think I as a MOC builder don't want these features and issues resolved ASAP? Personally I'm replying to this forum at this hour out of my own good will and attacking me will just push me away.

Not supported yet.

As long as there is enough demand.

PU motors have a more sensitive overcurrent/overheating protection than PF ones, so I think they are just overheating sooner due to the extra available power.

As mentioned before we will be expanding the center steer module to add PID values, trim, power limit, etc. options. Currently we are working on the support for the large angular motor and gearbox module so that we can fully support the Volvo loader.

As mentioned before, please send a ticked via official site for individual cases, this topic is for general chat. To explain center steering does indeed require a mechanical stop, otherwise the model can't possible know where center is. Like trying to park a car in a center of an endless parking lot, you can't center it unless you know where edges are. All official Lego sets use the same process to center and there's no avoiding it. We do plan to add more options to the center steer module on order to limit power and adjust PID parameters. Regarding servo motor oscillating, we tested it and had no such issue on BuWizz 3.0. And yes your model should have more power due to higher available voltage and current BuWizz provides.

BuWizz 3.0 no long uses speed modes due to a different architecture, but we are planning to add simulations io them in the app. Current is limited by battery's hardware to around 7 Ampers. I suggest you use ramp options to reduce the current spikes generated by motors. Thank you for the praise!

I just figured out how the rear diff lock works. The 20 blue tooth clucth gear is used as a straight and a bevel gear at once. The straight part powers a 12 tooth gear which turns the wave selector. The gear itself is powered perpendiculary by a half a stud 12 tooth bevel gear. This way one of the differential outputs axles is used as axle to transfer the torque from the CV joints to the wave selector. The only thing you have to be careful is to limit the wave selector movement so the diff lock doesn't engage the 20 tooth clutch gear which would cause the wave selector to turn along with that drive side. A very smart and a brilliant solution, kudos to Grohl!

Obviously, why else would they design and use a new version on the wheels.

Well done! Great idea using the rear axle and gearbox assembly as a starting point too.

From all the photos I think the driveline is as following: Both L motors directly drive (there is no gearbox) a red old styled 4L Diff via 24 tooth gears - That's 1:1 ratio The power from the central diff is sent via CV joints to a 3 x 16 tooth gears - Still a 1:1 ratio The power is than sent to a 28 tooth diff via 12 tooth gear ratio - That's a 2,33 ratio. Finally the hubs gear down additional 5,4 times. The final gear ratio is 12,6x. Combined that with the stalled torque number of 26 Ncm from Philo's website and x2 motors, the final ideal torque should be 655,2 Ncm, which is a really high number, especially with these small wheels. For comparison my original Fox 8x8x8 generated around 1000 Ncm. Wheel RPM should be 315 rpm / 12,6 which is 25 rpm. 25 rpm with the 81 mm sized wheels gives a top speed of around 100 mm/second or 0,4 km/h.

It was already mentioned a few pages back. I hope it pops into the hole firmly.