Questions tagged [technic]
A more advanced form of LEGO®, allowing for the creation of more realistic working parts.
46
questions
37
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4answers
10k views
When did LEGO decide that it was okay to put a stud into a Technic hole?
At one point, LEGO didn't really support putting a stud into a Technic hole, stating that it caused too much stress on the bricks. And for a while, there were no sets where that's the case. However, ...
18
votes
4answers
12k views
LEGO Digital Designer Alternatives
I am been using LDD (LEGO Digital Designer) for my latest NXT project and noticed a major delay in building and making instructions for my Projects (My Mindstorm projects contain well over 500 pieces) ...
20
votes
8answers
19k views
What are the largest Technic-compatible tires on the market?
I am looking for the largest LEGO wheels with tires available to build a nice-sized RC LEGO car.
Of course I will start with the simplest prototype, but I would like to achieve a design which will ...
9
votes
3answers
7k views
Is it possible to create a differential if I don't have it as a ready to use element?
I have numerous gears, axis and other elements from different Lego Technic sets.
I wonder if using them I can make a kind of a differential like this?
If not, how can I implement similar ...
6
votes
3answers
4k views
Does the LEGO "Power Functions Extension Wire" (8886) work in both directions between old 9V and new Power Functions devices?
Here is the LEGO "LEGO® Power Functions Extension Wire" (8886):
We can see that the left connector can connect to old 9V electric bricks or wires and the right connector can be plugged to the new ...
11
votes
3answers
3k views
How can a Mindstorms robot lift something very heavy?
I have a small LEGO Mindstorms robot and it needs to lift heavy objects, but it doesn't seem possible because the motor cannot bear the load. What methods or mechanisms can I use to make the robot ...
11
votes
2answers
7k views
Good LEGO CAD Design Software with Technic elements and animation
I'm taking computer engineering in Gr. 11 right now and our final project is to create a robot with the first version of Mindstorms. My partner and I are making a sumo robot for the class competition. ...
21
votes
4answers
3k views
What tool can get the Technic pin out from a connection closed in the other end?
I'm having trouble removing these LEGO Technic pins apart from their connectors and I don't want to use carpenter tools like pliers which may damage the bricks.
What tool can get the pieces separated ...
18
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7answers
7k views
How to unplug black friction pin connectors
Black friction pin without slots connectors are common in older Technic sets. Note that these were quickly replaced by the current version with slots that is much easier to remove.
vs
Especially ...
15
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1answer
1k views
What are these Technic "Zapfen" ("stoppers") called in English?
What are these pieces called in English? Google translator doesn't help in this case...
12
votes
3answers
1k views
Technic Pin/Travis Brick Legal Connection?
Is seating a Travis brick on a Technic pin a legal connection? TLG has used this construction at least once (M-Tron Particular Ionizer's "rotor"), but that was in the early 90s. Will this connection ...
8
votes
1answer
5k views
What is the "Module" of a LEGO gear?
Module, m this indicates the tooth size and is the number of mm of
pitch circle diameter (p.c.d.) per tooth. For gears to mesh, their
modules must be equal. Gear ISO standards and design methods ...
6
votes
1answer
3k views
How to control a 88004 Servo Motor with a Raspberry Pi?
I am able to control a simple servo motor such as SG90 by using pulse-width modulation. However when it comes to controlling a 88004 LEGO Servo Motor it is simply a nightmare.
By using PWM all I ...
5
votes
1answer
1k views
When and why were pieces 3651 and 3652 discontinued?
Bricklink has piece 3651 as Axle and Pin Connector, while piece 3652 is Engine Piston Square 2x2. You could attach them to each other to form a piston.
Service pack 5260, Connecting Rods and Stop ...
3
votes
1answer
175 views
Technic Rough Terrain Crane (42082) doesn't move
After first book, crane won't roll if pushed. If this normal. I know when you free soon one wheel, the other will go opposite direction, but when I try to spin all four in one direction, it locks. It ...
66
votes
4answers
10k views
Is it possible to build simple logic gates with LEGO mechanics?
I built a simple bitshifter in Minecraft yesterday. I wondered if something like this could be built with LEGO?
Maybe there is a possibility to build gates with rubber bands and those movable ...
37
votes
8answers
28k views
What are the best options for building a LEGO RC car?
I would like to build a remote controlled car. And if someone already has a good solution for that I would be glad to try it.
It's been a while since I had the time and material to build some LEGO ...
12
votes
1answer
7k views
Virtual LEGO / Technics / Mindstorms simulation environments
I know that there are quite a few LEGO CADs floating around, but are there any physically correct simulation environments for models built with LEGO / Technic / Mindstorms parts, that would, for ...
19
votes
1answer
1k views
How much weight can a handle of Technic pegs and beams support?
Some Lego spaceships have handles attached, made out of Technic beam and pegs, and attached to the model using Technic bricks, pegs, and axles.
For example, 7644: MX-81 Hypersonic Operations Aircraft ...
11
votes
2answers
2k views
What part(s) can I use to connect technic liftarms at a 90 degree angle?
Is there a way to connect the two beams in this angle and still keep the connection strong and keep the rotation the same?
10
votes
3answers
11k views
Alternative to LEGO CONTROL+ app
My son just received the Liebherr R 9800 excavator 42100 LEGO set.
It would seem the Control+ app that is recommended for it simply won't work. It doesn't even connect to the blocks.
What are the ...
26
votes
6answers
4k views
Can an axle be removed from this Technic 'brick paradox'?
This blogpost on Technic Bricks briefly explains a few 'brick paradoxes' or dead ends. This particular model seems impossible to disassemble by hand:
How can I remove the axle without damaging/...
15
votes
4answers
35k views
Is there a Technic set that is just an assortment of parts and not a specific vehicle?
Can I buy Technic sets that are just assortments of parts as opposed to a specific vehicle?
Background
I do research on sediment carbon cycling in lakes and I need use a rotating array of magnets to ...
14
votes
1answer
839 views
What is the difference between these hole shapes?
I purchased an assorted bag of LEGO Technic pieces. There are pieces with axle holes, but what puzzles me is that the holes are different from what I am familiar with.
There's a piece with an ...
6
votes
2answers
6k views
Pattern for vertical motion using technic lego
I have a motor and some other components that move a machine vertical on the ground. Inside the machine i need to raise a part by 5 cm, up and down.
Are there some common patterns that can move ...
16
votes
1answer
2k views
How can I make a precise one-way clutch using Technic elements?
I need a mechanism so that if a (NXT) motor rotates forward, it moves one gear, but the other stays still, but if it rotates backwards, the first gear does not move, but the second one does.
I found ...
12
votes
2answers
2k views
What are good books for building techniques of LEGO Technic
I've been searching for good resources for especially LEGO Technic. I find the Unofficial LEGO Technic Builder's Guide by Paweł “Sariel” Kmieć. The book is very good at explaining things. Beside that ...
11
votes
3answers
3k views
What are the torque limits of gears?
I am using Lego in the classroom to introduce students to geared machines.
As part of this I am asking them to design a winch, using a small 1.5V DC motor and a collection of the common Lego gears, i....
10
votes
1answer
1k views
Alternative for Technic, Gear Rack 1 x 7 with Axle and Pin Holes?
We are trying to build a MOC which requires Technic, Gear Rack 1 x 7 with Axle and Pin Holes and we don't have that. Could we build it? Or are there any alternatives?
FYI we do have Technic Gear ...
8
votes
2answers
7k views
Exact dimensions of studless Technic beams
I'm looking for the exact dimensions of the studless Technic beams. I found a number of answers for studded beams but there are some more aspects for the studless beams which are not covered.
I'm ...
8
votes
3answers
1k views
2:1 gear ratio in stud-less Lego Technic
Is there a recognised technique to create a 2:1 gear ratio in stud-less Lego Technic?
Neither of the two methods suggested here (studded though) work.
24T/12T with a 2L x 1L axle offset does rotate, ...
4
votes
1answer
983 views
How to disassemble this small Technic turntable, combination of parts 99009 and 99010?
How should I non-destructively disassemble the following parts, when they are newly assembled?
99009 Light Bluish Gray Technic Turntable Small Bottom
99010 Black Technic Turntable Small Top
3
votes
1answer
1k views
What are the measurements of the different Lego instruction booklets?
I've noticed that there are at least three different sizes (eg 7.8"x5", 4"x5.8" and 7"x8"). Are there other sizes?
2
votes
0answers
93 views
Science fair: "Can Lego's Fly" [duplicate]
I am doing my science fair on "Can legos Fly!" I am going to build a glider and test it 3 times (Independent variable). the wings will be foam. I will test it on how far it flys (Dependent variable).
...
12
votes
4answers
10k views
How to make a conveyor belt with LEGO parts?
I am making a small robot with an Arduino and Technic LEGO powered by stepper motors. I am planning on moving small rocks throughout my machine. Does anyone have an idea of what kind of Technic LEGO ...
10
votes
1answer
6k views
9398 4x4 Crawler front wheels rotate in the opposite direction to the rear wheel
We've just finished 9398 4x4 Crawler. Everything looks good, the motors work but the front wheels rotate in the opposite direction to the rear wheels, they also turn in opposite directions. What could ...
9
votes
2answers
7k views
LEGO Technic part Numbers
My daughter got the LEGO Technic - Service Truck set. When we looked at the instructions, we saw a different notation on parts.
eg: the beams (cross beam) it has number 5 in white circle. what does ...
9
votes
1answer
833 views
How to speed up assembly for big LEGO technic sets (e.g. 42043 Mercedes-Benz Arocs)
Is there any ways to help speed up the assembly process when building big LEGO Technic set such as the 42043 Mercedes-Benz Arocs?
7
votes
1answer
3k views
Issues with my LEGO Land Rover Defender - Low rear
Just built the 42110 LEGO Land Rover Defender and found the rear of the car sitting very low on its base and the rear wheels almost touching the wheel arches.
This is very low compared to the front ...
4
votes
2answers
414 views
Which parts have no-friction Technic axle holes?
I want to make a no (or very low) friction inline coupling for axles. The axles must turn, transmit moderate torque, and be in phase (therefore backlash must be minimal). The axles remain inline at ...
4
votes
2answers
1k views
What is the difference between these two Technic half bushings?
While randomly browsing some LEGO sites, I came across a weird (to me anyway) looking bushing. Its part 4265c. Below is one of the images describing it and the left one I recognize, but the right one ...
3
votes
1answer
227 views
Are there any LEGO sets that have these two parts?
Are there any LEGO sets that have the following parts:
Part 57518 (Link Tread Wide with Two Pin Holes)
Part 15035 / 18405 / 95292 (Large Shock Absorber with Very Hard Spring)
3
votes
2answers
489 views
My 9398 crawler going in reverse way
I built 9398 crawler set and everything seemed OK.
However, when I moved the RC tumbler up, the crawler went back, and when I moved it down, the crawler went forward.
On the battery box I saw ...
3
votes
2answers
2k views
What's the maximum pressure one airtank can withstand and how to tell its limit?
I bought a airtank and using it to support many v2 pneumatic cylinders, while I'm using a v1 pump and one motor to pump air to this air tank. Since another airtank or a lego pressure gauge is very ...
2
votes
1answer
652 views
LEGO Large Shock Absorber alternatives
Are there cheaper alternatives to Large Shock Absorber with Very Hard Spring (Part No. 15035 / 18405 / 95292 / 95292c01)?
2
votes
1answer
476 views
Which LEGO set is best suited to build robots?
My goal is to build some educational robot kits for kids and so I'd like to know if there are any LEGO sets that let you build almost anything or can you only can build the specific model that the ...
