Sokolov Edward

Lego uses different styles of displaying changes in instructions - apparently it depends on the author. For example, look at the instructions for the new motorcycle 42202 - it is different from the G500. But almost always in Lego instructions you see the assembled part of the model in real colors - this requires the presence of contrasting details (yellow, red, green) to dilute the monochromatic model at least in the inner part of the structure. Some Chinese Lego manufacturers use a different style - they display the assembled part in one color or make it pastel - this allows you to show the details from the current step in contrast.

This is not the worst drawback of the instructions. If you assemble according to Chinese instructions or MOC, there will be more complex tasks.

You need to push the pin from step 779.

You are wrong - this is not a calibration problem - at first the hand hits the pole with the ball perfectly - the problem starts after several operations. In real robotics, the manipulator is guided to the object by external sensors - "machine vision", which allows you not to depend on the accuracy of the servo drive rotation - the system automatically adapts with each operation and does not depend on the displacement of the object. At the beginning of the video, your hand takes the pallet with an offset to the edge - for such a design this is not critical, but it is noticeable.

The long-awaited instruction for C61503 appeared in the YWOBB library. Unfortunately, the Chinese comrades like to "inflate" PDF files several dozen times and this instruction suffered the same fate. After optimization through the foxit pdf editor, only 45 MB remained from almost 2 GB. According to the manual, the C61503 has exactly the same set of motors and controls. The manual says nothing about new settings and applications for this radio control unit. Most likely, there was a redesign of the motors and cables with connectors, which began to look like new Lego motors. Other Chinese manufacturers (for example, IM.Master 9809) already used similar connectors several years ago.

If you believe the cover of the instructions, they really should glow. The only question is for how long - my wristwatch has an afterglow, but it's no more than an hour. They're not on sale yet.

CADA promises to post instructions on how to assemble a large tyrannosaurus from 3 dinosaur kits. The instructions will appear somewhere here https://cn.doubleeagle-group.com/list.php?pid=6&ty=25&tty=19&page=16

In the video with the robotic arm, everything is not as smooth as you say - at 58 seconds the ball lands crookedly, and at 1 min 22 sec it does not hit the pole and falls. The drive of the turntable is not direct, but through a couple of gears and this is already enough for errors. The calibration action ends very quickly, and autocalibration is apparently not implemented or is not possible at all - correct me if I'm wrong. Another wonderful video about a factory made from Lego parts for building houses from greenhouse cucumbers:

A living confirmation of my words - even minimal use of gears between the motor and the mechanism still gives a noticeable inaccuracy of positioning. For home crafts this is possible and does not matter. It also has useful mechanisms in the household:

An ancient rarity produced in 1995-2000 - it is clear why I did not notice it. The Chinese have a copy of the Mindstorm - they did not add it there. There is information about it on Rebrikable, but there is not a single model using this sensor. It all depends on your tasks - I do not know them and do not claim that you will not be able to solve them, I just outlined the existing problems. There are many examples of robotics on Lego on YouTube. Ultimately, it is up to you to decide.

What's the difficulty? In addition to motors with a controlled angle of rotation, you need 2 more sensors - colors - to track the route line and a gyroscope to maintain position. If this is the limit of your desires, then you can easily repeat it. Lego motors were enough for me to build drifters and walkers with radio control. I have enough programming at work - I am interested in assembling something with my own hands in the real world, and not inside a PC.

In your example, the wheel is on the motor axis. Try to get the same result by transmitting rotation through several gears with play. There is no external rotation sensor in Lego.

Attaching an electric drive to Lego Technic is not the biggest problem now. You can find many projects on GitHub. But the main problem will be in the Lego parts - huge backlashes that cannot be calibrated or compensated will nullify all your efforts to program mechanical actions. To get an accurate mechanical response (movement, rotation, etc.), you need to use a stepper motor with feedback - there is simply nothing like this in Lego - this is a children's toy for learning the basics of robotics or inadequately moving cars. If you are satisfied with this level of control, then you can do this and get a lot of good emotions from the errors in their work.

You understood the meaning of this word correctly. There is an old Soviet joke about "finishing with a file". In this case, the need for such finishing is sad, but it is better than when the part is cast with irreparable errors. Such parts also come across.

Buyers in Russia also complain about this copy. The problems are the same - old tires, old #3 connectors are used instead of new #7 connectors, low-quality and broken parts. It is quite possible to assemble a G500 without the newest parts - it will be a fully functional analogue with an appearance close to the original in a color available to you. I showed it here Unfortunately, the quality of Chinese Lego copies is getting worse and worse. For me, the worst copy was the Peugeot 9x9 - I returned it to the seller half-assembled, because it was very difficult to disassemble. I recently bought a copy of the McLaren P1 for 44 euros. It also has problems with the quality of the parts and they had to be finished with a file.