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Tamas Juhasz
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Everything posted by Tamas Juhasz
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Thanks guys, ok, I'll post also here my upcoming models. @Georgehan: I wrote to my list your requests, I'll make them as my time allows, don't know when, but in this year. I make only existing or at least partly existing (like Maus) models, so T49 and IS7 will be fine. I also uploaded instructions for every of my tanks: https://www.dropbox.com/sh/7z9jhhisv66dgvh/AADArK3mdhnphc87EaE1tnyna?dl=0 In this folder you will find always the actual instructions. To moderators: is it possible to put this topic ( http://www.eurobrick...howtopic=100890 ) into this one (ww2 tanks)? So combine them? If so, I would edit the posts which require an edit. -
Tamas Juhasz replied to AkiyamaWataru's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThen they will send you a replacement servo, it's sure. TLG's customer service is the best.
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Tamas Juhasz replied to AkiyamaWataru's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingI know, it should work properly with Sbrick, but have you tried with original Lego receiver, too? The same problem happens? (to all: How much does it count in customer service, if you use third party parts?)
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Tamas Juhasz replied to Attika's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingAfter seeing many types of steppers, I can say, it's the best solution until now, in the single lever category. We have many paddle shifters, but a very few lever shifters. I wish, I had so good (so fast) stepper as this in my Porsche entry, but mine isn't. Thanks for sending me some days earlier the videos, to make some tests. I built IRL, and all what I can say, it works perfectly. No missed shifts, no big forces, just smooth and well done gear selecting. Keep up the good work!
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThanks all! A bit late, I know, but as I promised, here is the transmission, showing the sequential selector, gear changing rods and the gearbox itself (the gear placing is different than the usual 4speed's): Axles: Lime green: goes for the indicator in the cockpit Blue: main gear changing axle ("crankshaft") Yellow: main axle, this one selects the gears, the Bionicle eyes actuate this one's knob wheel Light blue: input in the gearbox, from differential Green: output from gearbox, goes to the clutch Rubber bands are hard to fit in LDD, but imagine one to the ball joint directly above the yellow axle. That's responsible for the 90° rotations. There is another limiter with rubber band, not shown in the pictures, that's for disengaging the clutch. Full size pictures: http://bricksafe.com...2-c---185-scale It's not so compact gear selector, rather that I focused on the single lever gear switching, the 962 C had enough space in length and sideways to integrate this mechanism. I think the LDD model will be finished in a few weeks.
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Hi! Here you can download: www.brickshelf.com/gallery/mbmc137/Mini-Tanks/T-28-T-95/zt-28-t29-bi.lxf It's not an easy model, the tracks are held by strings at the ends, you have to attach them to links, and put the other end of string between the front and rear plates. Friction will hold them strongly. Usually, there are some instructions for my mini tanks in Mocpages, but now the site doesn't work. If it will again, first try to search there, not every, but many of my tanks have instructions there. Anyway, it seems to me, this section is quite dead, the military topics especially, I don't know why, this is Eurobricks. I uploaded several new mocs in one post and no reply at all. Should I post in another subforum my tank mocs?
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Tamas Juhasz replied to doug72's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingYes, everything is clear, I agree, this could be the reason. I remember, I learned these too in University, that's why I mentioned the teeth profile above. These bevel gears are too universal. Now I saw closely the connection, and for proper working, beside you mentioned about angles, the turntable should have contain 1 - 2 more teeth, so smaller pitch. But, then, the spur gear mode would fail. TLG wanted to give too much with this part.
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Tamas Juhasz replied to doug72's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingEverything is the same, as you see in the pictures. There is no driveline, only the yellow driving axle. And even in this setup it's jerky. No, there is no dirt anywhere, every part is brand new. That's why I don't understand, why it doesn't runs smooth.
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Tamas Juhasz replied to doug72's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingOk, again: as I wrote, I placed everything as it should be, correctly. The 45 degree turntable side with 12t bevel gears, perpendicular. I make technic MOCs nearly 10 years ago, I see, how it should be placed. And, with 100% correct placing, as you can see in the pictures, it's motion is jerky, with ploygon effect and noise (yellow is the input): Everyone, who owns the new turntable: if you drive it, like in these pictures, runs smooth and without much noise? If so, maybe my turntable is wrong, but it seems fine, no deformation can be seen anywhere. One more thing can I imagine: it's only noisy and bad running for me. (maybe my expectations were too much about smooth running)
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Tamas Juhasz replied to doug72's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingIt works, yes, but very badly, at least for my taste. You can feel the polygon effect, it stucks, just like when you drive two gears with different teeth profile, or when you drive the old, Samsonite gears (but even those are better in this case, imho). Chain is no option. I want to use the new turntable with the 12t bevel gear, and it's annoying, because, as you said too, they are designed to work together. Should I post a photo or a render?
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Tamas Juhasz replied to doug72's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingIt's a bit off topic, but not far at all. So, I needed to drive the turntable, like in 42042, with 90 degree 12T bevel gear. The result is a bad drivetrain, it's noisy, and someteimes can "get stuck", but if you increase the torque at the driving axle, it will run again. The running is very lumpy, you really feel the polygon effect. I saw the teeth profile of the 60 teeth turntable, and it's a bit other than the 12t bevel gear's: http://img.bricklink.com/ItemImage/EXTN/2989.png My question: Is there any way to make much smoother, better running the new turntable with 90° 12T bevel gear drive? It seems to me, this turntable is nearly unusable at 90° drive, if not. (of course, I placed everything very carefully, the frame is very rigid and correctly placed, and I used brand new gears and turntable)
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThank you again guys, I'm very happy that so many great builders like this car. I saw yours, Jernej, really deserved the top category, congratulations.
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Tamas Juhasz replied to CopMike's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingCongratulations to the semi-finalists, I got the message too, thanks all the kind comments. (you have to log in, to refresh the messages, if you got it)
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThank you all! I'm thinking about making an RC version, when I'll have time, maybe with RC unit, or even better with SBrick, because the gearbox needs the servo motor. I only need one more LiPo battery to power it's 2,15 kg weight. I measured today.
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThanks everyone! Good question, I thought about this too. The reason is functional: the gearbox needs a long sliding mechanism, and under that, a smooth, homogen surface. Because of this, the gray panels in the right side must be face up. In the other side, there is a hidden compartment for the pump, the up facing panels are better for that, again. I'd like to make instructions, but I don't know when it will be finished, I'd like to come up with a quality one, and in August my time is much more limited. One thing is sure: instructions will be released one day.
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Hi! I present my entry to the Rebrick Porsche contest, a 962 C Le Mans racecar. In this moc I tried out some newly developed techniques. I was happy that I could finish it before the deadline, many, many working hours, days, "sleepless" nights were required to make it. If I had to choose, the 962 C is my dream Porsche, it exists. A legendary Le Mans racer, the first race car with real ground effect, and a road version was also produced in the nineties. I tried to design everything to represent the real car, both esthetically and in functionality. I put every information, explanation into the video, so here I list the main features: - Full independent suspension, in the rear with rocker arms and angled springs - 4 speed sequential transmission with indicator in the cockpit - Automatic friction disk clutch - works when a gear change happens - Working front brakes with small pneumatic cylinders and air tank - Brake pedal works, too - Openable doors and removable rear cover - HOG steering and working steering wheel - Kingpin inclination, Ackermann geometry - Real boxer crankshaft (instead of 180°V) Details: Antenna, interior, engine, turbos, rear view mirrors, headlights, windshield wipers, fuel caps, fire extinguisher, instrument panel, radiators, etc. Video: Pictures: Gallery: https://www.flickr.c...157668905453474 Hope you like it. Comments, questions are appreciated, as always.
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Tamas Juhasz replied to CopMike's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingLDD itself doesn't make good looking pictures, it's a very basic render, and I think isn't competitive with real photos. I can't imagine LDD mocs withput proper renders (pov ray, bluerender, etc.). Jim, or anyone from the team, do you know, what's allowed in case of LDD mocs?
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Tamas Juhasz replied to Jim's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingSounds really good. One question: can the fast mode damage any of the PF motors? If I know well, maximum 10 voltage can be given to them. Is it under that? What about the maximum current? I think this device needs a test from electrotechnical engineering viewpoint.
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThanks guys. The work with the chassis, technical parts is done. I added a fake coupler to the rear, but maybe it will work (if I'll build a trailer), it depends the purpose of this truck. large image: http://bricksafe.com/files/Tamas_Juhasz/maz-535---wip/renderBL003.png large image: http://bricksafe.com/files/Tamas_Juhasz/maz-535---wip/renderBL005.png The rear suspension with the rigid beams, which connects the rear wheels in each side: large image: http://bricksafe.com/files/Tamas_Juhasz/maz-535---wip/renderBL004.png ... and the steering mechanism with M motors: large image: http://bricksafe.com/files/Tamas_Juhasz/maz-535---wip/renderBL006.png I used two of them, to have more steering power, and the complicated placing was necessary because of the rigid chassis and robust drivetrain. The first and second axle are connected together with gears, there is 1:1,666 ratio between them (of course, second axle's wheels turn less). To keep this ratio, some special gear ratio was necessary (like 1:1,5). The two green 16t gears are connected with chain, I have the strong one (old chain from '80s), it worked well in the tests. A 1:5 reduction is built after the chain, should do it's job easily.
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Tamas Juhasz replied to CopMike's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingIf I build in LDD, can I make renders with other softwares, or it's not allowed? Are power functions (motors, remote control, leds, etc) fully allowed?
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New tanks: 26. Jagdpanther Full resolution picture: It was a quite succesful german tank destroyer in ww2, with robust construction, angled armor, and significant speed. info: https://en.wikipedia.org/wiki/Jagdpanther 27. Brummbär Full resolution picture: German assault gun in ww2, built on the chassis of Panzer IV. The two 2x1 tiles in the front can be held by strickers, sadly, there is no 2x4 tile with center stud in Lego. info: https://en.wikipedia.org/wiki/Brummb%C3%A4r 28. M24 Chaffee Full resolution picture: Light US tank, used in the end of ww2. The darkgreen color is special, so there are some parts (like the gun) which require darkgreen sticker covers. In reality, the four 1x3 dkgreen tiles above the tracks are held by strickers, like tools, or logs. info: https://en.wikipedia.org/wiki/M24_Chaffee 29. M10 Wolverine Full resolution picture: Probably the most famous US tank destroyer in ww2, can't missing from my series. info: https://en.wikipedia.org/wiki/M10_tank_destroyer Comments, questions are appreciated.
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThanks. The rear axles have no springs, they are connected with solid pivot beams, and the air in the huge tyres functions as "spring". The rear suspension will work without any trailer or additional weight to the rear. Currently, I don't plan to make a trailer, too, but maybe in the future I'll build. As others wrote, the easiest and cheapest way to get them, is Ebay, from whole sets (8366, 8475). I have 4 RC motors and 2 RC units with this method. Using RC motors with PF receivers and battery: You can see also here many examples about that, v2 receiver is recommended, but that will shut down due to their thermal regulation, too, but goes further in current, than v1. The power, you can get, is MUCH more if you use v2. The LiPo battery has current limitation too, about 1,5 A. Except these and the converter cable, everything is the same, as with PF motors. The gearbox in this moc will provide 1:25 and 1:9 ratios, so a high torque and a fast mode will be available. In default, the gearbox will be in first gear.
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThose are great joints, but I already solved the rear axle drive with similar solution, which worked well in the tests. In the front, both version would be too large, there are a bit less space between the two A arm in the front, than 3 studs in height, because of the angled position. It's a great simulator, but as I wrote, I drove it in Spintires, that's a pretty good off roading game, too. (although, I was dissapointed about the final release, became too boring, the demo was better) Thanks, without these, I think the whole truck would contain more compromises. And.. the building process with the whole chassis, suspension, drivetrain, and the most of the steering parts: full size image: http://bricksafe.com...5---wip/033.png I marked the drivetrain with light green, the gearbox's sliding axle with orange and the magnets which help in keeping second gear's position, with blue. The normal green axle is the input axle, there come the two RC buggy motors. The red 3L axle connects the sliding axle with the RC units servo, as shifting mechanism. full size image (4k): http://bricksafe.com...5---wip/034.png (I just tried out Bluerender, and it's an awesome rendering program, with it's simplicity, speed and results --> highly recommended to use, as alternative for Pov-Ray) I also added a 2x1x2 panel in the edges of front bumper, to look more authentically: More LDD screenshots:
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Tamas Juhasz replied to Tamas Juhasz's post in a topic in LEGO Technic, Mindstorms, Model Team and Scale ModelingThanks for posting, I really enjoyed the video, especially the dual camera view. Good to see, you had a great time.
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