Search the Community
Showing results for tags 'duty'.
Found 6 results
-
Hello everyone: I am glad to share this project, the mining excavator, based on Cat 6090. Phisycal Configuration: The Lego Cat6090 is a motorized digger on tracked wheels, 2 XL motors provided enough torque. On the track frame is placed the main structure, and a heavy duty turntable allows good rotations, without fricctions. The turntable is rotated by means of 1 XL motor. The main structure contains: the XL motor for turntable, the air compressor, 4 servos for pneumatic valves and the controller. The design is ultra compact in order to meet the requierement of size/scale. The tracked whell is ultra rigid structure, designed to resist extreme load. The air compressor has 4 XL motor and 2 pneumatic pumps, in order to provide a constant air flow and high pressure, both pumps are de-phased 180° in order to reduce vibrations. 4 PF-servos open/close 2 way air valves, to command all pneumatic actuators. The boom has 2 large pneumatic actuator. Due to heavy height of the boom, 4 spring supply extra force during the elevation. 2 large pneumatics actuators push/pull the arm, those actuators are placed below the arm. 2 large penumatics actuators dedicate to rotate the bucket. 1 medium pneumatic actuator, open/close the bucket. Electrical configuration: Three 18650 batteries provide an average of 11.1 V, the compressor are suplied with 11.1 V, and the servos, lights and turntable motor are suplied with 9V. A BMS (Battery Managment System) manages the charge and the discharge durgin the operation. The tracked frame is steering by the use of 11.1 V, and as well is manage by the use of a BMS. On Board System (OBS): The name given to the controller. There are two systems, one for the main structure, and the secund is used to move the tracked well. The main controller, is a server TCP/IP protocol. The controller has a ESP8266 microcontroller with a TCP/IP stack, this controller is able to be programmed in arduino languaje (also micropython) - Teh ESP8266 is used as a sever, Motor driver: used to control the compressor The 4 PF servos are controlled by means of digital outputs, and the lights. ld293d, this is a H-bridge used to control the turntable motor. The second controller, is a ESP8266 as a client, and controls the speed of the tracks. Also, it has a BMS in order to regulates the charges/discharge of the batteries Accessories: 1) Josyticks: Two joysticks, with 4 dof (degrees of freedom) each of one plus a on/off button, are connected to the server module. 2) App: An application developmented under Android studio is used to visualizate the air pressure and electrical current, this app is WIP (work in progress). Conectivity: The comunication used is socket TCP/IP- Main features: maximun pressure reached: 52 psi (358 Kpa) Voltage bus: 11.1 V Compressor electrical consuption: 23 W Weight: 6 kg Length: 30 cm width: 20 cm height: 30 cm Here some pictures, during the construction and commissioning Note: my apologies for my primitive english -
[MOC] Heavy Duty Skid-steer Loader
JLiu15 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Experimental MOC combining Mindstorms Robot Inventor and Control+. Features drive, backing alarm, arm elevation, bucket tilt, and a pallet fork alternate attachment with manually adjustable fork width. Functions/features: Drive (4x medium angular motors; 1 per wheel) Arm elevation (C+ L motor) Bucket tilt (C+ L motor) Manually adjustable fork width (on pallet fork attachment) Backing alarm Ever since I had heard that the new Mindstorms Robot Inventor is cross-compatible with Control+, I made a goal of creating a MOC combining them. A skid-steer loader seemed like a good subject to start for me - I wanted the drive to be as direct as possible, without connecting the wheels on one side with gears to a single motor. This meant 4 motors for the drive and 2 motors for each of the arm functions - perfect for the 6 ports on the Robot Inventor hub. The building process started with a base for the model - 4 medium angular motors each connected to a single wheel via a planetary hub. The motors were sandwiched between 2 11x15 Technic frames, creating a robust structure. The Robot Inventor hub is placed behind this part, and the C+ L motors for the arm functions are located above the drive motors. The chassis was kept as flat as possible with everything kept low to lower the center of gravity. Just in front of the Robot Inventor hub are two gear trains that transfer drive to the arm elevation and bucket tilt functions. Thanks to the use of planetary hubs, the model had plenty of torque and is able to climb some steep slopes without any issues, as shown in the video. Aesthetics wise, the model has a simple yellow/black color scheme. My original inspiration for this model was the CASE SV340, so the color scheme had some resemblance to that. Building the bodywork was quite discouraging at first due to it feeling like a building a box on wheels, but the model's looks really came together as the arms and rear body panels were installed. I also used plates and tiles to cover up bare pin holes and make the model look more finished, especially on the roof but also in other areas like the front windshield pillars and the top of the arms. Additionally, the model includes a handful of new 2021 panels, such as the small 3L curved panel and the 3x7 flat panel. As for accessing the Robot Inventor hub, there are 2 discreet switches in the bottom rear of the model that press the power and Bluetooth buttons on the hub. As everything is done from my iPad after powering it on and connecting it via Bluetooth, I don't have to look at the screen or press the left/right buttons. The status sounds from the hub allow me to know if the hub is powered on, connected, or powered off. As for controlling the model, I created a simple control profile in the Robot Inventor app using its code blocks. Two sliders control drive, and the arm functions are controlled using buttons. Additionally, a backing alarm sounds when driving in reverse. This feature is only controlled by the left slider, as I found that controlling it with both will essentially cause two backing alarms to play over each other. One issue I had is that the drive motors often don't start all at once - there'd be a noticeable delay in one or more of the motors. The C+ motors for the arm functions, however, work fine. I'm not sure what causes this, but this will definitely be something to consider for my next Robot Inventor/C+ hybrid MOC. Overall, I'm decently satisfied with this MOC. It was an interesting experiment in combining Robot Inventor and C+ that largely went according to plan. As someone who builds Technic MOCs, the new Robot Inventor hub is far better than the EV3 brick - it's got much better form factor (it's even a stud lower than the C+ hub), uses rechargeable batteries and is therefore much lighter, and has 6 ports that aren't restricted to motors or sensors. The only downsides IMO are the color (as teal doesn't blend well with most colors in Lego Technic) and the bright screen, but that can be easily covered up as I've done here. I definitely have plans for more Robot Inventor/C+ hybrids in the future, whether that be a Robot Inventor hub MOC with C+ motors or a C+ hub MOC with Robot Inventor motors. Photos: Video: -
[WIP] Heavy Duty Skid-steer Loader
JLiu15 posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
Hey guys, here's a new MOC I'm working on. This MOC will be an experiment in combining the new Mindstorms with Control+ to control 6 motors with a single hub. It will be powered and controlled by the new Mindstorms hub, with 4 angular motors for drive (1 per wheel) and Control+ motors for elevation and tilting. With the new Mindstorms having much better form factor than EV3, I anticipate it being much easier to use in my MOCs than EV3. The loader is inspired by the CASE SV340 skid-steer loader. However, some parts of that vehicle, especially the rounded section of the arms towards the rear, will be difficult to model with Lego pieces, so I won't model this after any specific skid-steer loader. So far, I have the chassis built. It's a compact chassis made of 4 angular motors sandwiched between two 11x15 frames. The wheels are driven through planetary hubs, giving it lots of torque. This gives me a good starting point to attach other elements, such as the arm mechanisms and the Mindstorms hub. This will definitely be an interesting build. When I learned that the new Mindstorms is cross-compatible with C+ thanks to both being in the Powered Up ecosystem, I knew I just had to make a MOC combining them. If all goes well, I'll definitely be experimenting more with the new Mindstorms in the future. If you have any suggestions for me, please let me know. Photos: -
[REVIEW] 42079 - Heavy Duty Forklift
Jim posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
REVIEW - 42079 - HEAVY DUTY FORKLIFT INTRODUCTION With 592 parts the smallest of the 2H 2018 sets. Of course, less parts doesn't mean a lesser model. It looks interesting enough and it has a promising B-model. The previous forklift (not counting the mini 8290) was the 8416 Fork-Lift from 2005, the year I got out of my dark ages. Needless to say this is a while ago. Like cranes, lots of people tend to like forklifts. Probably like those people, I am hoping that TLG will some day release a big forklift flagship, full RC, so you can fully control it like the 8043 - Motorized Excavator. But I digress. Let's see what this Heavy Duty Forklift has to offer. If you see this icon, you can click the image on the left or right side of the image, to cycle through alternative images. PICTURES Pictures can be clicked to view hi-res versions. More pictures can be found in my Flickr album. DISCLAIMER This set has been provided by the CEE Team of TLG. It's not my goal to promote this set. It's my goal to give you an honest opinion about it. Therefore, the opinion in this review is my own and is in no way linked to TLG. SET INFORMATION Number: 42079 Title: Forklift Truck Theme: Technic Released: 2018 Part Count: 592 Box Weight: 1,24 kg Box Dimensions: 37,7 cm x 25,7 cm x 9,0 cm Set Price (MSRP): £ / $ 69,99 / € 49,99 Price per Part: £ / $ 0.118 / € Links: Brickset, Bricklink THE BOX Apparently the size isn't important, or impressive, enough to mention on the front of the box. It only shows the Forklift transporting a drum with dangerous content. The picture in the top right indicates that the carriage can go up and down. That's great, being a forklift and all. BACKSIDE At first glance, this doesn't seem to be a very special set, but the backside reveals a very good looking B-model. This alternate model could almost have appeared on the front of the box. Other than that, it has an interesting color scheme, some nice dark blue panels. Color me interested! CONTENTS OF THE BOX This set contains: 2x Instruction booklet 1x Sticker sheet 4x Tire 6x Unnumbered bag INSTRUCTION BOOKLETS We have seen this before, but I was still pleased with getting the second booklet out of the box. STICKER SHEET Nothing out of the ordinary. Just a couple of stickers to provide some details for the bodywork, and of course the DANGER sign for the drum. TIRES Probably some of the most commonly owned tires by AFOLs, but we haven't seen these last year (2017). Last set to use these tires is the 42049 - Mine Loader from 2016. BAGS The set contains six numbered bags. HIGHLIGHTED PARTS Unfortunately, this set doesn't contain any of the new parts. Or any interesting parts for that matter. I have highlighted the following parts as the most interesting of this set. GEAR RACK AND HOUSING This Gear Rack Housing and Gear Rack can be found in six other Technic sets. The light bluish grey housing is only available in two sets though. DARK BLUE PANELS If you want these dark blue panels you are limited to just a couple of sets. And I probably don't need to tell you that two of these sets are pretty expensive. PART LIST Here's the complete part list showing you 592 parts. THE BUILD Early in the build, the chassis already contains a lot of the functional parts. The front wheels with differential, connected to the axle and gears for the fake engine. Two universal joints (U-joints) are used to connect the axle in the mast. In the picture on the right you can see the steering mechanism. Forklifts usually steer with the rear wheels, which is also the case for this vehicle. This profile view shows part of the cabin taking shape, and the 2-cylinder fake engine has been placed. Behind the driver's seat is an axle going down in the chassis. It's connected to the axle leading to the mast of the forklift. BODYWORK The bodywork gives the forklift a finished look. I like the shape and color scheme of it. The light on the top of the vehicle is not the Hand of God steering. In this case, it's the Hand of God lifting hehe. CARRIAGE The carriage is lifted using a Short Worm Screw Gear. The lifting height of the forklift is 16 studs. Thanks to M_Longer for measuring it. I forgot to do that and I currently have the B-model assembled. Always build the B-model first if you are writing a review and you will be covering both models. In case you are wondering how this is measured, here's the exact quote: "I have put a 16L link under and it fit perfectly ;)" LEFTOVER PARTS The usual selection of small parts. COMPLETED MODEL The completed model has an exhaust which provides Hand of God steering. I do like the position of the steering mechanism, but I don't like the fact it is connected directly to the gear rack. This not only results in inverted steering, but also in rather direct steering. I would have liked to see some gear reduction and reversal of direction. I can understand there is little place for an intricate system, but I still think it was feasible. This being a minor gripe, I do like this model a lot. I love its looks and its simplicity (in a good way). I had this model standing on the table and my five year old nephew immediately started playing with it. I only had to explain the tilting mechanism, which is located at both sides of the cabin, but besides that, he quickly started turning the knobs. LIFTING MECHANISM Click on the image below to show the lifting mechanism. REAR The rear of the vehicle does show some unused space. This gives me reason to believe a better steering mechanism could have been concocted. I do like the looks of the rear though. The solution with the two small panels is nicely done. From a slightly different angle the forklift does look those big boys driving around in harbor areas. Another picture from the rear. I can only conclude that it's a good looking model. B-MODEL Since the instructions for the B-model are included in the set, it's only logical to include it in the review. Lucky for me, my lovely partner @Kitty was willing to spend some time building this alternate model. She is not really into Technic, but she is willing to help me out every now and then. Usually, she is taking sets apart, but occasionally she assists building them, like now. Unlike the forklift, the fake engine is placed at the front of the chassis. So is the steering mechanism. Here's a side view with the crane attached. There is no mechanism to extend the boom. You simply need to operate it by hand. The finished model is actually very good looking. And it has the basic functions you would expect from a tow truck, steering, working fake engine and a crane/boom. Granted, a mechanism to operate the boom is absent, but this being the B-model, I can live with it. Shooting pictures for models with some sort of hook is always a challenge. The hook never hangs as you would like and it takes a couple of minutes for the hook to completely hang still . After putting the model on the table you wait...or go about some other business. And a picture from the rear. This is one of those sets which is actually 2-in-1, having a proper alternate model AND instructions to build it out of the box. Below is a picture of the left over parts. SUMMARY For a Heavy Lift Forklift it feels a bit too compact. Like I said in the introduction of this review, it would be cool to have a Heavy Lift Forlift, which is actually massive, like the real machine. Of course, this has nothing to do with the quality of this model. Lifting the forks/carriage is done via the beacon light on the top of the model. Tilting the mast is done via the levers on both sides of the cabin. Both functions work properly. Steering is done via the exhaust at the rear of the model. Steering is very direct and above all, it's inverted. This could have been done differently. At this price point, getting basically two proper models is great value. All in all I really do like this set. Nothing extraordinary, but if will definitely make for a nice gift. Downside for AFOLs is that most of us will be able to make this with our own inventory, since it doesn't contain any new parts. PROS It's affordable. Two very nice models. Functions work properly (steering can be improved though). CONS No new parts have been used. Steering is inversed (minor gripe). SCORE How do I rate this set? 8 DESIGN Two very good looking models, especially for a set this size. 7 BUILDING EXPERIENCE Nothing really special, as expected. But still fun to build. 8 FEATURES Properly working manual features. 8 PLAYABILITY Lots of playability. 7 PARTS No new parts were used. Other than that is an okay selection with some nice dark blue pieces. 9 VALUE FOR MONEY The cool B-model adds a lot of value to this, already great, set. 7,8 FOR LIFTING AND TOWING FINAL WORDS @M_Longer has created an LXF file which he has share in this topic. And @JunkstyleGio has created two wonderful renders. Thanks you for reading this review. All pictures can be found here. -
42079 - Heavy Duty Forklift
Jim posted a topic in LEGO Technic, Mindstorms, Model Team and Scale Modeling
-
Made this today: Not sure how to embed Youtube videos or if I even can, so help would be appreciated :). EDIT: Don't worry, it's automatic :P!
