%!$ Easy Diy Woodworking Bench Plans For You #!@

open-hardware-esc-02 Science Officer…Scan For Elephants! Have you checked out the EFM8 flashing tutorial? Seeing something unexpected? You will need a recent version from kicad. I wrote a programming tool in python.

This is due to the fact that the magnetic flux is integrated after the zero crossing instead of adding a delay based on the previous speed. When the motor is rotating while the controller is off, the commutations and the direction are tracked. The duty-cycle to get the same speed is also calculated. This is to get a smooth start when the motor is already spinning. All of the hardware is ready for sensorless field-oriented control FOC. Writing the software is the remaining part. For assembling the PCBs, the following pictures are useful the latest versions can be found on github : Remember to put an electrolytic capacitor close to the ESC on the supply Open Hardware Esc Example cable.

Soldering Tips This is the best tutorial I have seen so far. Flux is essential. I use a flux pen. Lead-free solder is no good. It has more poisonous flux, requires more heat, gives lower quality and is difficult to handle. Use a flat, screwdriver-shaped tip. If you get bridges between smd pins, removing them is easy with a soldering wick.

Make sure to get the alignment right for the microcontroller when soldering the first corner. If you solder multiple corners and the chip is misaligned, you have to use hot air and remove it, then clean the pads and start over. Software Installation and Configuration Tutorial This a brief tutorial on how to get everything running using a fresh install of Ubuntu Download, Compile and Upload the Firmware First, connect a programmer as described in this post.

Download, Compile and Upload the Bootloader Again, connect a programmer as described in this post. From the bldc-firmware directory, type the following commands while the programming cable is connected to the ESC: git pull make upload Note : Updating the firmware will delete the configuration of the ESC.

In order to do that, go to the bldc-tool directory and type: git pull qmake make Now you have the latest version of the firmware and BLDC Tool. Sensorless Motor Parameters Since this ESC uses uncommon techniques to commutate the motor in order to get good low-speed performance without sensors, it is important to set correct motor-dependent parameters in the sensor less tab. I will make a video showing this for several different motors soon, but until then you can try to follow these instructions: Connect the motor without any load and make sure that it can spin up freely.

Make sure that no other input such as PPM is used. If it is, it will stop the motor immediately when the detection tries to start it and the detection will fail. The motor should spin up, release throttle and then run slowly for a moment.

In general, small motors should have lower current and higher ERPM and larger motors the other way around. Increasing low duty will make it easier for the motor to run slowly during the test, but the result will become less accurate. Manually put the obtained values into the boxes.

Getting these parameters perfectly right is not too critical though. What they should be depends on the application and is in most cases not too important, but in general lowering them will work better if the load has much inertia. You can probably keep the same parameters I have, but if you want to tweak your startup you can experiment with them. Phase advance other terms: timing adjustment, field weakening To compensate for the current lagging behind the voltage at high speeds because of inductance or to get a bit higher top speed at the expense of some efficiency and torque, phase advance can be used.

Motor Current, temperature, RPM and voltage-limits can be configured depending on your application. Current Separate limits for acceleration and braking current. Separate limits for motor and battery currents. I usually set it way higher than the other limits because soft back-off is preferred rather than switching off the motor with a fault code, but it should never be higher than A.

This is useful if there is much noise and that fault code kicks in all the time. I usually have it ticked. Setting them about 20 degrees apart will make the ESC slowly decrease the maximum output current as it gets too warm instead of abruptly switching everything off. They will require an external temperature sensor in the motor. It is preferable to use the soft application RPM limits instead if possible. Setting this too high will cause cogging when moving in one direction and giving high throttle in the other direction.

On my longboard I have it at and my RC car has it a bit higher. Setting this value too high can cause much mechanical stress in some circumstances. I have it at for all my applications. Voltage The minimum and maximum input voltage. NOTE : I changed the voltage dividers in hardware The difference is whether the PCB has 33k or 39k resistors. The latest PCBs with 39k resistors can measure 60V, but you should have some margin on your supply voltage to be safe.

You can of course replace all 33k resistors with 39k and measure up to 60V. Misc Here are the rest of the motor configuration parameters. PWM mode Synchronous is recommended and the best choice for a majority of all motors. Nonsynchronous is only for experimentation and can kill the ESC if you are unlucky. Current control Startup boost is the minimum duty cycle to use when using current control. If the motor is to weak when you are just starting, you can increase this parameter a bit until it feels right.

The range is 0. A sane range is up to 0. Min current is the minimum allowed current. There should be no reason to change this, so leave it at the default value. Control gain is the gain used by the current controller. Increasing it makes the current response faster, but also increases the risk of getting an unstable system where the ESC can get damaged. Only change this if you know what you are doing. Speed control The PID parameters for the speed controller.

Only change them if you know what you are doing. Timeouts Fault stop time is the amount of milliseconds that the ESC should be completely switched of when a fault code arises. After that time, it will switch on and try to listen for commands again. Changing application requires a reboot. Learn more about reporting abuse. A cross-platform set of examples for the stm32 line of mcus. Game Maker Language 5 2. Ardupilot for underwater ROVs. Something updated in the package index, and now the dependencies are not installing correctly.

Output log attached. Seeing something unexpected? Take a look at the GitHub profile guide. Skip to content. I wanted to have the design open so everyone can learn from it.

It is really a pity that they decided to remove my logo and do not mention where they got their design from and sell it as theirs. Right now I am not sure if I am going to continue publishing my future designs under an open source license… This is the reason why you can not find my tiny brand-new ESC design with 2S support on my website yet. Even though this thing is really tiny, it features all the features you nowadays expect from a state-of-the-art ESC. Please note that this board is for 1S operation only.

This board uses some hacks to squeeze all components into this small form factor. It is something the other 1S ESC vendors used in the past as well, but it is against what you learn on how to design hardware.

Looks like a perfect match for an 1S Lipo, right? This is specified as absolute maximum rating, not something the device should be operated on permanently. One might argue that the 4. So in principle the Voltage of 4.

And as mentioned before, other ESC vendors did this in the past as well. If something is missing, please let me know! You might wonder why I release all that for free. The reason is simple, I just love open source stuff. Most of my knowledge is based on tinkering with open source stuff since my childhood.

This is my way to give something back to the community so please respect the license and release all work you do based on my design under the same license. Please note that you need a recent version of Kicad to open the files. I compiled my own binaries from Kicad commit hash efdfaeb. You will need no special programmer for this, any usb to serial converter will do.

The EFM8 devices come with a bootloader and I wrote a small python script that will do the flashing. The latest revision is currently being test flown by three friends of mine and myself. I do not sell this. You can not buy it from me. So for now you will have to build your own, this page should serve you all you need. The first clones without proper credit start to pop up. I can not recommend to buy there as they do not care about who designed the stuff. But go ahead and buy there, I would probably do the same.

Please refer to my disclaimer that applies to all projects presented on this blog. To be honest I am a total noob to electronics. I just got into building a few months ago. I am learning as I go. This is my first ESC. I understand the hardware part of it.

Big Box Hardware Stores Usa Self Closing Drawer Slides Adjustment Vba