Motor prosthetics company. Development of “Motor skills”: how Ilya Chekh was able to turn a child’s prosthesis into a modern accessory (and wants to make a gadget out of it). How prosthetics are created

ONE-TIME PRE-FLIGHT PREPARATION

As I said above, when you take the copter out of the box, I recommend that you carry out one-time work on your copter, which will save you from trouble in most of your flights. It is true that the copter flies, as the advertisement says, “straight out of the box.” But not really.

1) The first thing you need to do is, oddly enough, to disassemble the copter. How to disassemble it and which bolts to unscrew - there is a video on YouTube, you can easily find it. It is not necessary to separate the main board; you just need to “halve” the copter by separating the top plastic part from the bottom. After separating the upper part, carefully lift it - there is a cable from the GPS unit to the board attached to the bottom, do not break the cable.
2) When the copter is disassembled, the most important thing we need to do is to additionally shield the GPS unit at the top of the copter, from the bottom where the central board and the brains of the copter are located. This can be done using thin foil with an adhesive base. How to do this is described in this video:

Why do this: copter guides have experimentally established that such shielding helps to find higher number satellites and their retention occurs more confidently. Some people associate this with the “satellite dish effect,” when the shielding acts as a signal-collecting surface. However, most likely this is due to better shielding of the GPS unit from interference generated by the central board and the brains of the copter. Be that as it may, the result will be obvious. Be sure to do this.

ATTENTION: V latest versions phantoms, an additional screen has already been applied. Apparently, DJI took into account the user experience and began to glue an additional screen industrially. But in any case, you need to check whether your pet has it or not. If it is available, then adding another additional screen is a matter of your preference.

3) When you have sorted out the shielding, check each of the four motors on the copter’s arms for rotation. They should rotate freely and almost silently. If at least one motor rotates with noise or squeaking, you have a problem. Either it needs to be lubricated, or the sizing of the magnets inside the motor must be checked. DJI is trying to make products High Quality, however, there are defects in any product, and these are not isolated cases. You should not hope that you will be “carried away” - the damage from a broken copter is much more painful than spending a few minutes checking and eliminating troubles.
You can also find a video on how to disassemble and lubricate motors on YouTube. If at least one magnet in the motor is not glued firmly and falls off, this will cause jamming and failure of the motor in the air, followed by capsizing and crashing of the copter.

You can also (after assembling the phantom, after removing the propellers), run them at home and control the sticks from the app - listen to how each motor works.
If the motors do not creak or make noise, they rotate easily, silently and equally well. Let's move on to the next point.
4) Now we check that all blocks on the main board are secure and skewed. There were cases when the control unit was slightly unstuck and tilted a couple of degrees, which caused the copter to try to level itself, and, accordingly, roll and fly in that direction.
5) Visually check the accuracy and efficiency of soldering in all areas of the board.
6) One more important work The thing you need to do right away is to secure the cable connector from the GPS unit to the main board. According to the experience of phantom guides, this connector was the cause of more than one flyaway. You should understand that a quadcopter with 4 motors is an ideal source of high vibration. And it is vibration that can cause loose connectors, as well as mounting bolts. Since most phantom guides fly in GPS mode, poor contact of the GPS unit or its disconnection in flight will clearly cause your pet to fly off towards the Chinese border. Therefore, we tightly insert the connector of the GPS cable and secure it with sealant. Another problem solved.
7) Make sure that all the wires are well soldered and do not dangle.
8) If you have the opportunity, ask the workshop to cover all exposed electronics with a thin layer of waterproofing varnish. This will save you from problems with the formation of sweat on the board and short circuits.
9) Now let's put the copter back together. After assembly, tighten all the bolts on the copter.
10) Print on plain paper tips on the positions of the toggle switches on the app and secure them with tape next to the toggle switches - then you definitely won’t make a mistake when switching them.

11) I recommend that you immediately switch the copter in the assistant program from the “Phantom” mode to the “Naza” mode. The Naza mode adds the ability to intelligently control the copter, and also makes it possible to assign the "" mode to the third position of the S1 toggle switch (right toggle switch).FailSafe ", when activated, the copter will return home to the take-off point, you will not need to turn off the app, you will just need to flip the switch. These are certain advantages, while controlling the copter in these two modes is no different - be sure to do this. The only minus is the copter signals in modes"Phantom" and "Naza" are significantly different, you will need to remember the signals in the mode"Naza".

12) If you followed my advice in step 11 and switched the forfeits to the Naza mode, IMMEDIATELY assign the “S1” mode to the third position of the toggle switch S1FailSafe ". Thus, when switching, the S1 toggle switch will work in the following order: GPS- Atti- FailSafe. In addition, IMMEDIATELY set a sufficient height for the phantom to return in this mode. Keep in mind that on its way when returning home there may encounter trees or buildings that the phantom cannot fly around. The auto-return height set to 50 meters will be sufficient for most cases. In this case, the auto-return height is prescribed in the assistant program, as well as switching the phantom mode to “Naza” and the functions of the S1 and toggle switches are reassigned there S2, and in the DJI application on your smartphone or tablet - in the latest versions of the program, you can set the auto-return height directly in your phone-tablet.

13) Print out the copter signals in Naza mode on plain paper and attach them with tape to back side Apps. Remember, the copter signals in phantom and reverse modes are different!

Congratulations - now your pet is ready to fly out of the box)))

CONTINUOUS PRE-FLIGHT TRAINING

This is the part I recommend you do before every flight. Or, at least, every time I go out with a copter for flying. You definitely need to memorize this part. This will save your nerves, and prolong your pet’s life.

So, before each flight you need:

1) Charging. The most important thing is to check that all components of the phantom are fully charged. This is: a) Copter battery b) Video signal repeater c) The batteries in the remote control must be strong. In principle, they are enough for several dozen flights, but don’t skimp and install good batteries and change them at least after a couple of dozen flights. Understand that this is control equipment for your pet. d) Smartphone or tablet on which you will receive the video signal. You must also understand that the smartphone or tablet where you receive the signal serves not only to receive video, but also displays telemetry data. Do not fly with one of these devices not fully charged.
2) Screws. Check the tightness of the screws. If the tightening is insufficient, it may happen that one of them simply unscrews in the air, followed by a rollover and crash of the copter. The screws on Vision Plus are self-tightening, but such cases have happened. Tighten the screws tighter - you don’t even need a special key for this - just hold the motor with one hand, and with the other, turn the screw towards the drawn closed lock on the screw until it stops.
If you are using non-self-tightening screws, also ensure that the heads of each of the 4 propellers are tightened.

Hidden text

CFG-ERR- Configuration error, may appear when updating firmware from old version. Or not normal equipment calibrations. Re-calibrate your hardware, power cycle your aircraft and check all parameters.

VOL-LOW [Error 4]- Low voltage.

SN-ERR- Your serial number is missing, please contact DJI support.

VOL-LOW [Error 6]- Low voltage.

IMU-ERR- IMU error. Contact DJI for repair.

X1-ERR- You have selected channel settings from X1/X2 on one of the hardware switches, but the signal is not detected X1/X2 on the input channel, or the hardware is not turned on.

X1-ERR- You have selected channel settings from X1/X2 on one of the hardware switches, but the signal is not detected X1/X2 on the input channel, or the hardware is not turned on.

PMU-ERR- Check the connections between the battery, aircraft and PMU (Power Management Unit).

RX-ERR- Go to the DJI Naza-M Assistant Software, BASIC menu, RC tab, select the correct receiver type or check all receiver connections, after disconnecting and connecting the copter, the changes will take effect.

COMPASS-ERR- The compass is not working properly. Please reboot the aircraft and calibrate the compass, if the error persists, contact your dealer (place of purchase).

Error- IMU initialization error, this may be caused by a crash(es). Please contact your dealer (place of purchase). How to solve this problem is written in our FAQ - Question: The copter does not start the engines. Error 25 appears in DJI Assistant Software.

Error- Please perform the advanced "Advanced" calibration. How to solve this problem is written in our FAQ - How to connect to a computer. Where can I get drivers and software? How to reflash a copter. The copter is not behaving stable.

Error- GPS is not calibrated or is subject to magnetic interference. Calibrate the GPS again in good conditions. How to solve this problem is written in our FAQ - How to connect to a computer. Where can I get drivers and software? How to reflash a copter. The copter is not behaving stable.

Error- There is no description of this error in the original manual. It appeared in a person who heavily loaded the copter, and also, after disassembling and then reassembling the copter, he incorrectly installed the top cover of the body, the marks of the pattern on the body did not match:

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As a result, the propellers were not installed according to the rotation pattern. The copter did not take off at full throttle, and the engines hummed loudly. Be careful when assembling!

P.S. I carried out a test, specifically fixed the top cover of the case incorrectly, but at the same time Right! installed propellers (in accordance with the rotation pattern). The error did not appear; most likely it was caused by the copter being overloaded. But due to the displacement of the cover, the copter walked +/- two to three meters when hovering. That is, I did not clearly keep the “point in the air” in GPS mode. Changing the location of the cover does not change anything (the most important thing is to put the propellers on correctly, according to the rotation pattern). The compass mounted on the chassis is important. It must stand in exactly this position and exactly on the chassis on which it stands. This is worth considering when switching to other chassis.

In the Naz 2 flight controller there is a “circle” - the GPS antenna and compass are combined, but also has a “direction of movement” mark (the movement arrow is indicated on the top of the circle).

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Excerpt from documentation on how to treat the effect of toileting - “walking in circles” in Naza2

This method of treating the problem is relevant only for GPS modules that are placed like an antenna in a “circle”. For DJI Phantom copters, this method is useless, since the “compass” is located on one of the legs of the landing gear. But in theory, you need to twist in in this case compass, since it strictly contains north-south-west-east readings.