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Questions tagged [motor]

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4
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0answers
36 views

I'd like to build a mechanism to press buttons on a remote control. What is a good basic approach to use?

I have a small remote control like device with about 11 buttons. The centers of each button are placed about 1.1cm apart, and each are about 0.7cm in diameter (this means about 0.4cm between the edges)...
1
vote
1answer
46 views

Can I push the train of 60052 [duplicate]

We more like to push trains with hand. There were old ones, like the train of set 2741, where when pushing the engine, the contact became loose between the axis and the cog wheel. Can I count some ...
9
votes
3answers
120 views

What's the best way to start an 8 year old on Lego Technic building?

I'm a grandpa trying to start my 8 year old grandson in LEGO Technic building. I am particularly interested in mechanical parts building and motorization. He already loves LEGO and attends after ...
12
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0answers
125 views

Is it possible to dismantle and refurbish an original 870 Technic motor?

I have a couple of ancient 870 motors (the 4.5v ones) that run but don't sound great. I've looked for, but can't find, a guide on how to dismantle them. I'd like to either get in there and clean/...
5
votes
1answer
112 views

Are there any difference between the 88003 and 99499 L motors?

I am planning to attempt a couple of RC MOCs and was looking up the power functions L motor on BL and found that there are actually 2 types of the L motor, namely the "88003 Power Functions L Motor" ...
2
votes
1answer
47 views

How can I get the EV3 to control an ordinary motor with PWM?

Looking at the hardware developer pdf, it looked like the EV3 should output a PWM signal with a duty cycle corresponding to power level. It does, but only for 100ms and only on pin 1. Is that how the ...
2
votes
2answers
140 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
3
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1answer
44 views

Get robot to face perpendicular to nearest object, using the ultrasonic sensor in NXC?

I have an ultrasonic sensor attached to a motor so that the sensor can rotate. Right now it stops once it scans a value less than 65 cm. What I want it to do is to scan its surroundings and then face ...
4
votes
1answer
116 views

Which resistor value is used for which motor in Power Functions 2.0?

Based on the answer here it seems that resistors are used to detect what is plugged in with LEGO Power Functions 2.0. So which resistor values (or ranges) apply to which motors or other devices? Are ...
6
votes
1answer
132 views

Is it possible to use 5 motors on an EV3 brick?

The EV3 brick has only four output ports (A B C & D) to run motors. Is there any way to use port 1 (sensor port) to control a motor?
3
votes
1answer
55 views

Is it expected that LEGO will produce small (S or XS) PF motors?

The existing LEGO PF motors are the M, L, and XL, making builders suspect that the S and even the XS names were left out and reserved intentionally for later designs. However, the M motor was released ...
2
votes
1answer
200 views

Confused about power functions motors 8883 and 8293

Is the motor that comes with the Technic power functions motor set (8293) and the stand alone motor 8883 the same? We have just built the LEGO Creator 10261 roller coaster set and it specifies a 8883 ...
3
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2answers
70 views

XL motor and M motor on IR receiver = same output?

I am really puzzled by my small car build with balloon tires (55976). I tried swapping between an XL and an M (PF) motor, both geared down (up?) to about the same torque (I tested by how sleep a slope ...
1
vote
1answer
68 views

How to send through Bluetooth motor angle position and mirror that position on another motor?

I've built a steering wheel that checks the servomotor position using NXC function - MotorRotationCount(). Now, I want to send that position to second brick using Bluetooth and apply that servomotor ...
3
votes
3answers
99 views

NXT motors spin when in air but stop on ground

I have a car that I made with 2 motors in the back and one motor in the front. The motors spin fine in the air but when I put it on the ground to test my program the motors stop. The robot itself isn'...
0
votes
1answer
96 views

Help with Multiple Motors/ Intelligent Bricks and coding/ programming/ daisy chaining

Built the accompanying robot earlier in the week. I have a challenge where the robot needs to find white/ black bricks then store them on a tray and then travel over to another robot and transfer the ...
2
votes
1answer
230 views

EV3 Unregulated Motor - different plus/minus power behavior

I'm helping some fellow Bay Area LEGO User Group builders who want to use an EV3 to power a 9V train. I'm using the NXT to 9V conversion cable (https://www.bricklink.com/v2/catalog/catalogitem.page?P=...
3
votes
2answers
62 views

Angular resolution of NXT motor

I am sure that I read somewhere that the resolution of the motor sensor was 2 degrees, but I can find no mention of this in the NXT Help file. What's more, the motor control block allows the Duration ...
4
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2answers
94 views

What about Power Functions motor, S size?

LEGO Power Functions has motors in M, L and XL sizes. Usually, if someone uses this size designations, the smallest one is S. It would make sense to have them named S, M and L if there were meant to ...
4
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0answers
149 views

How do I connect a LEGO wheel to axles so it can be powered?

I have a growing LEGO collection, which I first started with a lot of parts from the generic LEGO Classic 10697. Sometime later, I bought a bunch of wheels, numbers #55981 and #6014. My question is, ...
2
votes
2answers
314 views

Can I convert my train 9V 4563 to the power function motor?

The motor of my locomotive is dead. I have two choices : repurchase it or buy a power function. It is possible of customize my train 4563 to use the power function motor ? If yes, what set to buy ? (...
7
votes
1answer
118 views

Can I still motorize Universal Building Set 8034 and other from that time?

Set 8034 was supposed to be motorized using 8700. Of course, this is way outdated and kinda pointless to buy motor this old. Current set for this purpose is 8293. Problem is, old motor was 5 studs ...
3
votes
1answer
510 views

What is the best solution to power up two 5292 buggies?

I have two buggy motors, 5292 like this: I see powering each separately and using two IR receivers soon triggers the receivers' protections and the motors are stopped. My aim is not speed, I see ...
5
votes
3answers
291 views

Why won't the loop block in my EV3 program stop?

I am building a robotic hand, and I programmed the finger to close when the touch sensor is pressed, and release when the touch sensor is released. It did that with a loop block - but when I ran ...
9
votes
2answers
263 views

How to lubricate the 4.5v train motor for set 7722?

How I can lubricate the 4.5v train motor on my #7722 train set? It squeals.
5
votes
1answer
466 views

How to make Lego Mindstorms EV3 robot go in reverse when move steering input comes from proximity sensor

I saw an program on the Lego Education page which makes a Lego Mindstorms EV3 robot gradually slow down as it approaches a wall. The info from the proximity sensor is used as the direct wire input of ...
6
votes
1answer
95 views

Lubricating 6216m2 engine

Is there any way to lubricate old 6216m2 engines (these grey round ones)? I have 2 from my childhood, and they still run, but have trouble starting and make an awful 'whining' sound from time to time. ...
4
votes
2answers
598 views

How to best transfer power at 90 degrees for high torque applications

So, I am building a tank model and this is the transmission I have been working on: Description: There are two gear pairs for gearing up (16t to 8t gears) and one gear pair for gearing down (worm ...
2
votes
1answer
175 views

EV3 motor control proportional to another motor when more than two motors

From what I understand, in EV3-g you can use "move steering" or "move tank" blocks to regulate two motors proportionally to each other as they have a built-in PID controller to do that. If one motor ...
5
votes
1answer
194 views

How can I improve my rackless steering design?

I am trying to build a vehicle with a sturdy steering mechanism powered by the servo motor. When I was a kid I did this all the time with a rack and pinion design, but now I don't have any of the rack ...
4
votes
1answer
1k views

How to get double the speed from 2 regulated EV3 motors?

So I've noticed that if I connect two EV3 motors to one another (with gears), I still get exactly the same maximum speed as if I had a single motor. So, my question: how can I get twice the power/...
12
votes
1answer
228 views

Are there any benefits to using PF motors instead of EV3 ones?

Can someone explain to me the key differences between PF motors and EV3 ones? I understand that EV3 motors are 'regulated', presumably meaning that you can control their rotational speed depending on ...
5
votes
1answer
192 views

Problem with running two XL motors motors

We are trying to run our Grand Prix racing car on remote control and would like to use two XL motors for the wheels. One motor on its own works fine, but when connected together the motors stop ...
0
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1answer
741 views

Moving the motor to certain initial position [duplicate]

I was assisting my child in EV3 missions, specifically, the 3rd mission of TRACK3R, the one where the robot has to grab two tires and put them elsewhere. The mission requires to manipulate the Medium ...
4
votes
1answer
140 views

Which system is more efficient?

I got a few XL power functions motors, and want to combine them to make a racing car. Let's get to right to the question: Which one save the most torque power? This one... ...or this one? PS: It ...
4
votes
2answers
898 views

LEGO Mindstorms Motor Power

I am working on a project with a LEGO Mindstorms (RCX) motor. For this project, all I need is to spin a motor (43362, http://www.philohome.com/motors/motor.htm). I was wondering how the LEGO ...
0
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2answers
337 views

EV3 Motors not moving even though ev3 has batteries

I am new to using the EV3. I have only had it for 3 weeks. My question is why are my ev3 motors not moving? I know the motors are new and they are in such a good condition they could be sent back ...
8
votes
2answers
227 views

How do I connect two models to one PF motor?

Hi there I am trying to see if it is possible to connect the Ferris Wheel AND the Winter Village Carousel to one Power Functions motor. Is this possible? Does anyone have a link to a video perhaps ...
4
votes
1answer
120 views

Drive motor via Power Functions IR with own power source

I want to see if it is possible to drive a Power Functions motor both with variable speed and forward/reverse with my own power source. I am planning to use my own power source, an IR receiver and a ...
5
votes
1answer
1k views

How do I make the Mini Cooper (model 10242) motorized?

I'm trying to find out what exact parts I need to make the Lego Mini Cooper 10242 motorized. I'm trying to surprise my boyfriend with the set plus the parts he needs to make it motorized. I'm just at ...
2
votes
1answer
54 views

NXT Program doesn't do what it's supposed to do

Ok, so I have this automatic gearbox I have made and I have 2 motors and 2 touch sensors I want Motor A to spin forever unless Motor B is turning Motor B should turn around 15 degrees and then brake....
5
votes
1answer
702 views

Cheapest and Simplest way to build a LEGO Technic car?

Having no LEGO Technic parts at all, I'm looking for the cheapest and simplest way to build a LEGO Technic car which can be combined with two Lego Technic motors to drive forward and backward (phase 1)...
8
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3answers
2k views

How to power “Power Functions” devices from an electric wall plug?

In this video showing an example of Great Ball Contraption, we can see (at 1:35) that some trains powers are used to power Power Functions motors: That must be more convenient than having to ...
6
votes
3answers
2k 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 ...
6
votes
1answer
759 views

LEGO Submarine waterproofing functional parts (e.g. motors, RC receivers)

From my understanding, the motors and RC receivers are not waterproof. Thus, the LEGO submarine from Sariel's LEGO® Workshop rust after sometime. So, is there any way to make the motors and RC ...
6
votes
1answer
1k views

How can an EV3 motor “remember” it's starting position?

I am currently working on a project that uses large motors. I want the project to return to a "starting position" (0,0,0) at the touch of a button so that it can be used multiple (identical) times. ...
6
votes
2answers
628 views

Is it possible to damage a pneumatic pump/motor by applying too much pressure?

I've recently bought the Mercedes-Benz Arocs model, which contains a compressor (i.e., a pneumatic pump which is operated by an L motor). I was wondering whether you can ruin your pneumatic system ...
3
votes
1answer
375 views

How to motorize Technic 42040

Where can I find instructions on how to motorize the Technic Fire Plane. We have the kit 8293 which contains a motor, battery box, lights and switch, but we have no idea how to attach them. Will ...
4
votes
1answer
154 views

What is this motorized LEGO piece?

My brother bought a big tub of LEGO recently and found this piece inside. He doesn't know what it is and we can't find anything about it online so we were wondering what it is. He says it isn't in any ...
2
votes
1answer
251 views

How to Motorize the LEGO Mars Rover

I am looking for some suggestions. My daughter is building the Mars Rover set (go here for the details: http://www.eurobricks.com/forum/index.php?showtopic=98222) for a presentation at school and I ...