Questions tagged [motor]

A motor is a machine, especially one powered by electricity, elasticity, pressure, internal combustion or some other means, that supplies motive power for a device with moving parts.

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26
votes
5answers
17k views

How can I use more than three motors with one NXT brick?

I'm building Caterpillar Excavator with my NXT, and at the moment I'm trying to control 4 points of motion: 2 Caterpillar Tracks - These should be controlled independently to allow for cornering, etc....
17
votes
4answers
16k views

How to speed up the 4x4 Crawler truck 9398?

Just finished building the 4x4 Crawler and it was a fun build but as a remote control car it is . . . in a word . . . SLOW! I know it's powerful and can climb over stuff but sometimes there is nothing ...
16
votes
2answers
2k views

Will playing with a PF train motor by hand damage it?

If one pushes a PF-motorized train by hand, will it cause damage to the motor, or any of the other parts (IR Receiver, Battery box)? It is essentially working as a generator when turned by hand, so ...
16
votes
2answers
1k views

Is it safe to overload LEGO train motors?

When I was in Fana'Briques in 2008, there was a speed record competition for TGV-themed train. The setup used a section of custom-made straight track (aluminium rails if I remember correctly) and was ...
15
votes
4answers
9k views

How to build a steerable remote-controlled vehicle with just 1 motor?

In WeDo 2.0 set there is only 1 motor, which can be remotely switched on and off by using the iPad app (by writing a Scratch program). Also motor rotating direction can be toggled remotely. As an ...
14
votes
4answers
13k views

Which is faster: M motor or XL motor?

I understand that the M motor has an adequate amount of speed, and the XL motor is best known for its torque. But is the XL motor really faster than the M motor? Or is it the other way around? I am ...
14
votes
1answer
2k views

Will Lego repair a bad motor?

I have the Electric Technic Micromotor: http://www.peeron.com/inv/sets/5119-1 and it simply won't come on. I seem to recall at some point someone telling me a long time ago, that if you sent parts ...
12
votes
5answers
3k views

Can I build a faster LEGO train motor?

I was going over LEGO Power Functions train motors, and I was not satisfied with the speed. Speed seven is fast enough to derail the train on the curve, but not fast enough realistically. I am ...
12
votes
1answer
2k views

How much current do the LEGO motors draw?

I'm building a project with Raspberry Pi and some other electronics driving the LEGO Power Functions M-Motor (8883) and I need to know how much current those motors draw under load. Has anyone done ...
12
votes
2answers
324 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/...
11
votes
1answer
1k views

Can I safely dissassemble a 74569 motor (the old, fast 9v one)

I have an ancient 74569 motor: Unfortunately, it's broken: The shaft spins freely by hand, but when I connect power to it, it doesn't spin at all. I would like to see if I can just open it and place ...
11
votes
1answer
1k views

What is the difference between train motors 88002 and 10153?

I want to motorize my Santa Fe Super Chief. Its original instruction mentions 5300 but it's marked obsolete on BS.com and now re-released as 10153. In the same time 88002 costs few times less, e.g. $...
11
votes
1answer
280 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 ...
10
votes
3answers
2k views

How can a Mindstorms robot lift something very heavy?

I have a small LEGO Mindstorms robot and I have to lift something heavy. Now it seems not possible because the motor is not strong enough.
10
votes
2answers
749 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.
9
votes
3answers
261 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 ...
9
votes
1answer
388 views

Information on this large beige motor w/battery box?

I have a LEGO Technic motor with a built in battery box for x3 "AA" batteries (thus 4.5 volts). Could you help me identify it? What set does it belong to and how old is it? Colours are beige and green/...
9
votes
2answers
1k views

How to fix my XL motor?

I used the XL motor near water. Now it stopped working. Can someone tell me what I can do to fix it?
9
votes
1answer
2k views

NXT motors not moving?

I've been looking around the net for a solution to this problem, to no avail. After taking my NXT v1 out of storage, I tried using a motor, but it sortof just, moves back and forth once, then '...
9
votes
1answer
5k views

How can I rotate an EV3 motor an exact number of degrees using RobotC?

I'm trying to rotate the motor of an EV3 by an angle of 50°. I can't. How I can rotate a NXT/EV3 motor by a given angle using RobotC?
8
votes
2answers
5k views

If I were to make a LEGO fan how would I make it blow air on me?

I was just wandering off into my imagination and then it hit me: I should make a LEGO fan? I mean, how hard could it be? It is actually very hard for me. No matter how much ratio I put on it, it ...
8
votes
1answer
3k views

Power Functions battery box and receiver limits

What combination of motor/Receiver/battery boxes are possible/supported? example: 2x XL motors, 1x M Motor, 1 light using 1 receiver and 1 battery box.
8
votes
1answer
2k views

Can 10153 9V train motor be powered by the Power Functions Battery pack?

I am currently making the switch to Power Functions with my Lego Train collection and am wondering if I can power the old 9v motors that I used with the metal rails, with a battery box from the power ...
8
votes
2answers
1k 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 ...
8
votes
1answer
4k views

How does the Super Awesome Micro Project work?

I've recently read an article about a car which is made entirely of LEGO and it runs on air. I'm curious about how it works. Can someone explain the details of it? Here is the car: These are all the ...
8
votes
1answer
373 views

NXT motor power accuracy

When turning the motors, how precise is the speed parameter? I am programming in the NXC language (standard firmware) and wishing to know how many decimal points will be taken, if any, and whether the ...
8
votes
3answers
4k 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 ...
8
votes
1answer
773 views

NXT brick output ports not working properly

My NXT brick will not let motors run. When I download a program the motor will move forward and backward and then stop - sort of a wiggle. Another motor will not work at all. This happens for all ...
7
votes
2answers
10k views

How can I transmit horizontal torque to vertical?

I have a setup where I have a step motor which I am attaching a gear onto. The motor will make the gear stand horizontal in a small vehicle. Is there any good gear combinations of LEGO gears that can ...
7
votes
2answers
996 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 ...
7
votes
2answers
2k views

Does the PF Servo motor return to center?

Does the PF Servo motor, which was introduced in the 9398: 4x4 Crawler model, have return to center feature?
7
votes
2answers
2k views

Is the PWM on the PF Servo motor different than the PWM from an Arduino?

I have a Arduino motor shield connected to XL, L and M motors and can control the speed with PWM (Pulse Width Modulation). I made my own connector by cutting a Lego PF connector in half and wiring up ...
7
votes
1answer
138 views

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

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 ...
7
votes
1answer
333 views

What prevents a 12V motor, when pushed by hand, from providing DC electric out?

This question is somewhat related to a similar question I asked about whether pushing a 12V train motor (such as the one below) would damage it. See title "Set 7865: six wheeled Lego® train motor (...
7
votes
2answers
1k views

How much torque can a lego axle handle?

from to this question, it seems that the gears are stronger than the axles, which begs the question of how strong are the axles? if you connect one of the stronger motors, such as say the buggy motor: ...
7
votes
3answers
2k views

Ideas to slow down RC PF train motor (Item: 88002)

I'm wondering if you already tried to slow down such a motor. I would like the train to run slower at all the supported 7 speeds. Anyway, at speed 7, the train just flies off the tracks.
7
votes
2answers
2k views

What is the difference between the two train motors 8866-1 and 88002-1?

At the Lego store the other day they were talking about a "more powerful" train motor for the Maersk train (I was asking about adding a second motor to the red cargo train so it would go uphill). But ...
7
votes
1answer
3k 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. ...
7
votes
4answers
14k views

How to program two NXT motors to run at the same time?

I'm working on a project with multiple axis of movement… trying to get two motors to run at the same time in order to achieve a mix of two!
7
votes
2answers
147 views

Read power usage and respond when motor is straining

Is there a way to know if the drive wheels are "straining", like when locked up with an opposing bot? This is for a Lego sumo bot using the Lego Mindstorms Education EV3 Core Set (EV3 Large Motor ...
6
votes
2answers
356 views

Compatibility between vintage (80s/90s) Technic and current parts (motors etc)

I've recently got my old Technic out for my daughter (who's a little young for her own, but her Friends now drive around in a tank). If I start to acquire more, and more sophisticated, motors and ...
6
votes
2answers
303 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 ...
6
votes
2answers
4k 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 ...
6
votes
1answer
185 views

What are the various LEGO motors that have been produced over the years?

RCX, NXT, WeDO, EV3, Technic etc. How many different motors have been released over the years??
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 ...
6
votes
3answers
3k 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
655 views

Robot that builds a copy of itself

I'd like to try building a robot that can build a copy of itself. Basically, I guess that involves: having some means of navigating around (i.e. wheels, tracks, something to move on) having some ...
6
votes
1answer
453 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
1k 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?
6
votes
1answer
338 views

Will playing with a 12V train motor by hand damage it?

This question is similar to one for PF motors. The 12V motor bogie has considerably more resistance than does the newer PF bogie motor, which may be moved very easily when not operating. So, if one ...