How to get rid of KISS 24A Race Edition ESC’s
I want to improve the weight power ratio of my 130 class training build. Therefor I decided to remove the KISS 24A Race Edition ESC’s. They will be replace with the lighter DSHOT600 compatible BeeRotor BS20A ESC’s.
To do so I removed the KISS ESC’s from my BeeRotor Ultra 130 Carbon Fiber Mini FPV Racing Build. I had some BeeRotor DSHOT600 BS20A BLHeli_S ESC 2-4S on an exploited LisaM build.
At first I used scissors to cut open the insulation tape I used to fix the ESC’s onto the arms. I often use insulation tape to fix ESC’s. It is durable and easy to remove when there is something to change.
Removing the shrink tubing
Then I used kids nail scissors, as they have a rounded pike, to remove the shrink-tubing from the ESC’s. You can see that the proportions of the ESC’s to the frames do not really fit. I had mounted the KISS ESC’s on the BeeRotor to benefit from the telemetry option. In particular I wanted to get a current draw readout on my Spektrum transmitter over the SRXL protocol.
Desoldering the BeeRotor BR20A ESC’s
It turns out that the 130 needs a full rebuild to get the smaller 20A ESC’s into the right place, so I desoldered the BeeRotor ESC’s from the LisaM build. I decided to leave the power and signal wires on the ESC’s and to only desolder the three motor wires. So I had to also desolder the power wires from the PDB leaving only the motors, the PDB and some oil from the nano coating on the frame. You can also see the amateurish insulated XT60 power connector.
The next step was to clean up the solder pads on the ESC’s with some flux(I had none left) and desoldering braid.
Now it was time to clean up the LisaM airframe from the leftover nano coating and to store the airframe away for the next build.
Disassmbling the BeeRotor 130
I went on with the disassembling of the BeeRotor 130. But be aware it’s a water proof and not a clean build.
Disconnecting the flight controller
At first I carefully remove the hot glue from the connectors on the flight controller(BeeRotor BRF3) to disconnect the Spektrum Quad Race Serial Receiver w/telemetry (SPM4649T) and the PDB(Power Distribution Board).
Disconnecting the video transmitter (VTX) and removing the Topplate
Then I unplugged the VTX (BeeRotor 5.8G 20-600mW Tunable Transmitter 40CH SMA) to be able to unscrew and remove the topplate.
Unsoldering the signal and ground wires on the flight controller
Next I unscrewed the flight controller to desolder the signal and ground wires to the KISS 24A Race Edition ESC’s. After that I desoldered the power wires from the PDB.
Here you can see the unsoldered flight controller, there is just the power connection from the controller to the 5V regulator on the Power Distribution Board left.
I don’t want to withhold you the image of the crimped molex connctor for the regulated 12V for the BeeRotor 25mW-600mW 40Ch Video Transmitter (VTX).
Removing of the PDB
Now it was time to desolder the power cables to the KISS 24A Race Edition ESC’s. I didn’t have to be very careful at this operation as I desoldered the power wires from the ESC’s later on. Then it was possible to remove the PDB to gain access to the ESC power wires at the bottom of the PDB. So I desoldered the ESC’s at the bottom of the BeeRotor 130 quad to physically decouple the PDB from the BeeRotor Airframe.
Removing the flight camera
I had to remove the flight camera to gain access to the power wires of the remaining two KISS 24a Race Edition ESC’s. I am using the ELGAE FOV 160 1/3″ CMOS camera include with the frame.
Get rid of the KISS 24A race edition ESC’s
Finally I was at the point where I could get rid of the last two remaining KISS ESC’s on my BeeRotor 130 Quadcopter.
Soldering the motor wires on the BR20A ESC’s
After cleaning up the PDB and pretinning the BR20A ESC’s I soldered them to the motor wires. I twisted the two wires on the motors #2 and #3 to change the direction of the motors from clock wise(CW) to counter clock wise(CCW). In the next Blogpost we will see that I was wrong and I should have twisted the wires on motors #1 and #4.