Sign up or log in to customize your list. Here's how it works: Anybody can ask a question The best answers are voted up and rise to the top 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 asking this question because I recently saw the L motor, and one reviewer said "It has the speed of the M motor but the torque of an XL motor." I am assuming this means that the M motor is faster...? It delivers a maximum torque of 90,4 mNm (600 mA). Without load its rotation speed is around 220 rotations per minute. It delivers a maximum torque of 45,4 mNm (450 mA). Without load its rotation speed is around 380 rotations per minute. It delivers a maximum torque of 40 mNm (300 mA). Theoretically, in terms of power (speed • torque), the XL Motor is faster than the L Motor and M Motor. The reason being, you can gear up the XL Motor 2:1 and have the following output: running torque of ~7 N.cm & rotational speed of ~290 RPM.
However, a small amount of these measures will be lost due to friction and decreased efficiency (by transferring drive through gears). Regardless, comparing these measures to the normal output of the M Motor — running torque of ~3.63 N.cm & rotational speed of ~275 RPM; and the L Motor: running torque of ~6.4 N.cm & rotational speed of ~272 RPM — and we have a clear winner, as far as running torque performance goes. Also, it is worth mentioning that the XL Motor has significantly higher efficiency than both the L Motor or the M Motor. RPM measurements listed here are the loaded characteristics, not no-load. This is why the RPM numbers listed here are lower than what others have said. Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged motors power-functions or ask your own question.
If the motor is blocked the current will exceed the maximum limit of the LPF system. Turn the Power OFF, unblock the motor and turn Power ON again. The XL motor fits within 5 modules both in width and height and with the snap interface in the front and on the sides it is easy to fit and lock into TECHNIC constructions. This post was tagged with: Used & new (44) from $9.89 + $5.07 shipping Sold by ETEB STORE and Fulfilled by Amazon. LEGO Functions Power Functions XL-Motor 8882DetailsLEGO Functions Power Functions IR RX 8884 FREE Shipping on orders over . Powerful rotation for your Power Functions! Add an extra XL-Motor to your LEGO creations! This super-strong motor will give plenty of power to your models, whether it's spinning a wheel or turning a system of gears. Use the XL-Motor to animate larger builds. Requires battery box, not included. To be able to understand why LEGO has been successful for so long, just look to the name. LEGO originally got its name from founder Ole Kirk Christiansen who combed the Danish words "Leg Got" which means "play well".
He later realized that LEGO in Latin translates to "I put together. The LEGO set became a standard of creative play for children worldwide, unlocking the creativity to build vehicles, buildings, cities and more. Historians point to the invention of the wheel as a major turning point in world history. The invention of the LEGO wheel had the same monumental effect in the history of LEGO, making it possible to create cars, trucks and eventually the LEGO train building set that is one of the most successful LEGO sets of all time. LEGO currently produces about 20 billion LEGO bricks a year and has sold over 400 billion LEGOs in their history -- enough for every person on the planet to have over 60 LEGOs each! Powerful rotation for your LEGO® Power Functions! Add an extra XL-Motor to your LEGO® creations! This super-strong motor will give plenty of power to your models, whether it’s spinning a wheel or turning a system of gears. 5.3 x 4.8 x 1.5 inches 2.4 ounces (View shipping rates and policies)
7 - 11 years #21,603 in Toys & Games (See Top 100 in Toys & Games) #690 in Toys & Games > Building & Construction Toys > Building Sets Lego Power Functions L-Motor 88003 LEGO Technic Motor Box LEGO Functions Power Functions IR RX 8884 5 star80%4 star17%3 star3%See all verified purchase reviewsTop Customer ReviewsGreat motor. I am using as a Lego Mindstorms ...Lego Power Functions XL motorLEGO Functions Power Functions XL-Motor 8882 ...A strong motor, but not well integrated with Lego bricksBirthday present for my grandson. He has quite a ...Happy BuyerLego xl motor is the best motor for trucks See and discover other items: lego person8871 Extension Wire 50cm If the length of the wiring on the elements is getting too short you can use the Extension Wires. They come in lengths of 50cm. Notice that the Extension Wire has only 1 LPF male plug and 2 LPF female plugs.LEGO® Power Functions XL-Motorproduct_label_list_price_accessibility 50 Reviews123451FIND MORE PRODUCTS LIKE THISTrainsPowerful rotation for your LEGO® Power Functions!
8883 Power Functions M-Motor is a TECHNIC Power Functions set released in 2008. It contains a medium sized Power Functions motor. It requires the Battery Box to work. This motor has a maximum torque rating of 40 mNm, and a maximum speed of 380 RPM (without load). The newer L-Motor is slightly faster and has more torque, but is slightly bigger as well. Add a spin to your LEGO® Power Functions models! Build an extra medium-strength, medium-sized M-Motor into your LEGO® creations and watch things start moving! Use the M-Motor for speed. Requires battery box (Item #8881), not included.It has long been a dream of mine to build a remote controlled LEGO car. LEGO has many Technic cars in their program that use the Power Functions to remote control certain functions, such as opening doors or lifting an arm. Power Functions use infrared light for communication between the sender and the receiver. In the past, LEGO also had remote controlled cars that use radio frequencies, which is much better, since it does not require a line of sight and has a much further reach.
Recently, LEGO released the 4×4 Crawler and it really triggered something inside of me. I ordered the set, but when it arrived I never put it together. I started to build my own cars right away. I looked for inspiration on the internet and found many great off road cars, trial trucks and multi purpose car technology. In particular the work Pawel “Sariel” Kmiec. Check out his book “The Unofficial LEGO Technic Builder’s Guide” or visit his website. LPE Power also has some wonderful instructions on how to build real car technology with LEGO. Speed, torque, weight, balance, clearance and grip are the key factors when designing an off road car. Your choice of motors, gears, wheels, and chassis all influence these factors. Four wheel drive is a must for off road cars. Differentials are a big no-no due to the slip. A wheel detached from the ground would spin freely, while the wheel still on the ground will receive not torque at all. I also do not believe that a suspension system is necessary for a LEGO off road vehicle.
There are no passengers that require comfort and the big tires already absorb enough energy. LEGO has many motors in their program. The most recent Power Function Motors come in three sizes that vary in terms of rotation speed and torque. The higher the speed the lower the torque. You can find out about the exact characteristics in this web page. For the steering you might also consider using the new servo motor. You can change the speed/torque ration through the usage of gears. Sariel is offering an excellent tutorial on gears. More importantly, you can build gear boxes to shift gears. This enables you to have a lot of torque when you go uphill and more speed when you go down the hill. Again, Sariel is offering instructions for a heavy duty gear shift. I tried other compact gear boxes, such as smooth three gear box, but they all failed under a lot of torque. Here is my extension of the slfroden’s original design. I used a linear actuator to switch the gears remotely and you can now use two motors on it.
I left out the neutral gear to make it more compact. It is a nice design, but not suitable for off road vehicles: Next, I expanded Sariel’s original design since I did not want to move the motors around. Moreover, I wanted to attach two motors directly onto the gear box without the need of extra gears. You can use a linear actuator attached to another motor to shift the gears through a remote control. Here is a video of the gear box: So here is my super ambitious first model. It has two XL motors, a gear box that can be operated remotely, four wheel drive, lots of clearance. The battery pack is all the way in front, making it a good climber. I used the servo motor to steer the front wheels and the 8879 to remote control the servo. This was an complex design and in the end pretty useless. The steering was difficult to control. Most of all, it was slow. Turning the wheels from left to right took forever. Hitting the red stop button to bring the wheels back into the neutral position was often the fastest way.
The gear shift also turned out to be problematic. Sometimes the gear was in a “in-between” state. The only solution would have been to glue the tooth wheels onto the axis to prevent them from changing their position on the axis. Due to the lack of a suspension system, wheels did also occasionally lift from the ground, which resulted in a lack of grid. In conclusion, this is a far too complex design. There are numerous places where problems can occur. Back to the drawing board! I radically changed my approach. Instead of building a steering system and a propulsion system separately, I took the “all wheel drive” approach. It works similar to a continuous track, often found in tanks. Electrical cars also use the idea. In essence, you attach each wheel to a dedicated motor. My first design, however, ended being extremely wide: In the next design iteration I placed the motors along the main axis of the car. This was a much better climber since I could also place the battery pack right on top of the front axis:
The main drawback with this design was the small clearance. The car could not drive over obstacles easily. So, in the third design, I put the motors up and used the angled bars to bring up the chassis. This was an even better climber but the M motors are very difficult to mount. In the fourth iteration I used the L motors which gave me nice and compact car. It could easily get up slopes and drive over obstacles: But why stop at 4WD when you can go 6WD? My 6×6 ATV vehicle used six motors. Worked perfectly fine, but was slower than the 4WD. The battery can simply not provide enough juice to run more than four motors simultaneously. This six wheeler got pretty heavy and complex again, so I thought it was time for some minimalism. I tried to build a slightly geared down vehicle. The building instructions for this ultra light car are available and you may consider using the L motors instead to get more power. You could then use bigger wheels which does enable the car to drive upside down.
Here is a video of the car driving around: This was a lightweight and working model, but due to lack of suspension, wheels could still be lifted from the ground. It is desirable to have as many wheels on the ground as possible. Individually suspended wheels, such as in the super car, have a tendency to be fragile and pendular suspension systems are a better option. The 4×4 Crawler uses such a system. The same effect can be achieved by using a joint in the middle of the car that allows it to twist along is main axis. My final design iteration included a joint in the middle of the car that allowed it too twist. You can download the instructions as LXF file for LDD. Check out the model at Rebrickable. This design still did not have a good clearance, so I lifted the axis a little bit and got to my final design “RACE“: Each wheel is powered by one L motor. This design eliminates any loss of power due to tooth wheels. It is fast and at the same time it has enough torque to go up steep hills.
The short wheel distance and the large wheels gives it the ability to climb over objects. Here is the car, named “RACE”, from the bottom view. Here is a video of RACE in slow motion: I build a more robust and simpler version called RACE2 (how surprising). I added a roll over cage, bumpers in the front and the motors are now better attached to the chassis. Building instructions and more photos are available. After completing this RACE car, I had one week left to try out continuous tracks. The first thing I noticed was that the LEGO tracks are extremely smooth and have very little grip. They could hardly get up and obstacle or hill. My first attempt at improving the tank was to rise its front wheels: This design was still a failure, since the front had now a high level of attack, but still no grip at all. In an act of desperation I decided to “spike” my tracks by adding 3/4 Pins into it. With this small change, the tracks could bite into every little crack or edge.