Posted by gervais |
Dec 07, 2015 @ 10:14 AM | 3,078 Views
If you happen to own a Cheerson CX-20 or a Quanum NOVA and youŽre not really satisfied with it, but you like the size, you might want to do a small refit with a PIXHAWK or one of its clones or derivates. HereŽs one proposal, how you could do that:
Sure, thats already the modified NOVA, original pics you can see at one of those "DonŽt let the price fool you" places or at Dogdudes informative CX-20 thread.
What a mess. Needs some clean up. First youŽll remove the flight controller, the GPS and all the loose cables attached. Remove the so-called damping pads (underneath the FC ) as well, nobody needs that stiff stuff. Keep it all clean, since you want to throw it at the bay. Remove the fancy connector setup underneath the body as well as the two status LEDs , but keep their caps. You might want to remove the motors or the ESC as well, weŽll get to this later...
If the (external) Compass (MAG) doesnŽt seem to work, most users accidentally swapped SDA / SCL wires of the IČC bus.
Since most of the cheap chinese traders and their suppliers donŽt stick to common pinout assignments, colors donŽt matter and pinout or connector diagrams are often wrong.
Colors of the wires donŽt matter !
This is what users are paying for the cheap price.
However, assuming that you know where GND and Vcc (+5V) are located at your PX (fancy knockoffs require a Multimeter to find out because youŽll likely to damage your GPS/MAG or MAG if swapped), only SDA and SCL are left and can be swapped without damage.
Most of the time, the external MAG will work afterwards, if you did not try to operate a 3.3V MAG with the 5V (!) supply of the PX IČC Bus. Sometimes (like at the cheap CJMCU boards) this requires a mod .
Note: It is important to reboot the PX after swapping and sometimes a new start of the Mission Planner is required to see the results.
Quick analysis if and what is wrong or not, can be done with the Mission Planner:
This pic shows the COMPASS_DEV_ID of the PX, if just the internal MAG is visible: 131594 and the external is not or wrongly connected.
You see this picture , if you do a compass calibration and move the Flight Controller. compass 1 error is...Continue Reading
Test review DJI E305 Tuned Propulsion system: New definition of the entry level !
In 2015, the former DJI Tuned Propulsion program (meanwhile copied by several competitors) has been completely renewed with E310, E800, E1200 Tuned Propulsion kits. DJI covers all common sizes for Multirotor market now. With the new product line, the DJI Propulsion Laboratory introduced sine- wave technology and 2 way communication even at the entry level. Competitors were left behind.
But what about the popular Flamewheel kits ? Which kit is going to replace the former E300 Propulsion system ?
The answer came pretty fast, when the E305 Propulsion Kit has been announced to define the new entry level : Its brand new 2312E motor represents a significant upgrade over the previous 2312 model. The optimized electro-magnetic system boosts efficiency by nearly 7% and lowers cogging torque, which provides noticeably smoother performance at low RPMs. A newly designed motor base not only provides better heat dissipation, but is also coming with a new advanced hi-tech look. The 420 LITE ESC utilizes the tried and tested square-wave drive architecture, further perfected by DJI engineers. Based on this classic design, the 420 LITE provides simplified functions in a much smaller and lighter package than the E310. Internally, an efficient and responsive algorithm serves your platform with a high level of maneuverability and stability
Posted by gervais |
Feb 08, 2015 @ 05:44 PM | 6,532 Views
Sometimes the Postman comes with a nice package: This friday, the new DJI E800 Propulsion set arrived. Some pics to take, review coming up. You may use the pics for your own threads, if you mention the source..
Posted by gervais |
Aug 12, 2014 @ 07:31 AM | 5,588 Views
Some pics out of my collection. Feel free to use them for private purposes or on RCG. It would be nice, if you mention the source. Please donŽt use them for EBAY offers or commercial purposes....Continue Reading