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Questions tagged [motor]

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2
votes
1answer
76 views

How do I run the Lego Technic V6 engine using a Lego electric motor?

I am not into Lego, don't know anything about it, so I will try to be as specific as possible. My goal is to spin the Lego Technic V6 engine (preferably at some realistic RPM's like thousands). ...
4
votes
1answer
320 views

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

I have a growing LEGO collection, which started with a lot of parts from the generic 10697-1 'LEGO Classic Large Creative Box' set. Sometime later, I bought a bunch of wheels, part numbers being: ...
4
votes
1answer
100 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)...
4
votes
1answer
88 views

How to mirror an EV3 motor?

I want to get one EV3 large motor to copy the other. So if I move one half a rotation the other copies.
1
vote
1answer
24 views

Can a v1 PF reciever power an XL motor and servo?

I have a v1 PF receiver but don't want to pay $35 for a v2 receiver and I was wondering if a v1 receiver can power a single XL/L motor and a servo.
12
votes
2answers
190 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/...
12
votes
3answers
10k 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 ...
0
votes
1answer
58 views

can 2 powered up train motor be plugged into one hub

I have set #60198 and it comes with one powered up motor. I'm hauling many many cars and one motor isn't enough any more. I see there is a slot for "B" on the hub. Is it possible to plug in another ...
2
votes
0answers
55 views

Rearing off to the left without telling it to

I've started to build a robot, but when it drives it veers off to the left even though I'm just telling it to go straight. I think I need to do something to the motors but I don't know what or how. I'...
1
vote
0answers
41 views

Makeblock and LEGO PF cable synthesis

My 10yo son and I have ventured into the realm of taking our LEGO hobby up a notch with robotics. We have built the makeblock mbot and adapted LEGO bricks and want to incorporate the Power Functions ...
0
votes
2answers
60 views

Can't link variable inside a switch when creating a new block

I have a problem when connecting the variable (from the create a block) to a variable in the function because it's inside a switch. How can I link them? I want to connect the variable to each (20) in ...
2
votes
1answer
56 views

Two motors are driven forward, why are they rotating in different directions?

I have the Lego Mindstorms EV3 Pack and built a simple car with 3 wheels. The back whels are motorized. When I run the following code: Motor.A.backward(); Motor.D.Backward(); both motors are ...
3
votes
0answers
42 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 ...
1
vote
1answer
61 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 ...
0
votes
2answers
465 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 ...
9
votes
3answers
135 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 ...
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.
26
votes
5answers
16k 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....
5
votes
1answer
246 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 ...
4
votes
1answer
128 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 ...
3
votes
0answers
663 views

Can I use EV3 with a TETRIX motor?

What program can I use to control a TETRIX motor through the LEGO EV3? I've heard that RobotC currently cannot be used for this. Has NI released a Labview version which I can use to control TETRIX ...
5
votes
1answer
160 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" ...
10
votes
2answers
380 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.
2
votes
2answers
168 views

How to make an exact 16 degree turn?

Does anyone know how to make an exact 16 degree turn with a LEGO robot?
2
votes
1answer
153 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 ...
4
votes
1answer
214 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 ...
14
votes
4answers
7k 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 ...
3
votes
1answer
58 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 ...
6
votes
1answer
391 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?
2
votes
1answer
275 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
votes
1answer
67 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 ...
3
votes
2answers
147 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
79 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 ...
4
votes
1answer
232 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 ...
10
votes
5answers
2k 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 ...
3
votes
3answers
103 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'...
2
votes
2answers
446 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 ? (...
0
votes
1answer
124 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 ...
9
votes
1answer
4k 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?
2
votes
1answer
369 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
67 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 ...
3
votes
2answers
194 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 ...
3
votes
1answer
729 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 ...
7
votes
1answer
121 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 ...
5
votes
3answers
347 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 ...
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 ...
14
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 ...
6
votes
1answer
1k views

Slow down the mindstorms EV3 motor so target position is not overshot

I have Debian jesse installed on a mindstorms EV3 and I'm using the ev3.lego library: https://github.com/topikachu/python-ev3 I want to be able to slow down the motor as it reaches its target ...
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
1answer
2k 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.