I spent only $10 more on this project, I missed the brushcutter wire and clamps. Everything else,I got it from my others projects or in my stock. I took 3 hours to realize it.
It's workswell, it's powerfull (1000w) and funny. I use a wire rather blade, it's less dangerous.
Step 1: Items List
motor: turnigy sk3-5045-500kv brushless outrunner
Esc controller: FVT Wolf 2-6s lipo barttery 120a Pro A impermeable car speed controller esc bec
battery: multistar hight capacity 6s 10000mah multi-rotor lipo pack
Remote: quanum 2.4ghz 3ch pistol grip tx end rx system
charger: digital charger ap6 pro tronic and his supply
pulley perforated at 8mm for make the head : 21 t5 25 teeth
steel plate for battery box: 500x500x1.5 mm
steel plate for motor ventilator: 50x50x0.5 mm
steel plate for motor fixing: 50x300x6 mm
steel pipe (or wood) for handle: 1200x25mm
3 metal clamps
3 plastic clamps
4 perforated plates (meccano)
steel pipe for the left handle: 500x15mm
1 key ring for the trigger
screws for metal and wood
wire for brushcutter
Step 2: Manufacture of the Head
perforate 2 time the pulley for the cutting wire and add a thread to maintain the wire when the head turned
You must use the proppeler adaptater provided with the motor and assemble it with the pulley without tightening hard. you will tighten in the motor axis later
Step 3: The Motor Support Plate
take the metal plate an for folding it, make two saw slot and fold it in an vice.
drill a 8mm hole for the motor axis
drill 4mm holes for fixing the motor
drill a little at 8mm the 4mm holes for hide screws head.
fix the motor on the plate with screws
add the brushcutter head on the motor axis and tighten hard
Step 4: Fixing the Handle
take Meccano plates and screws/nuts.
drill 4 holes to put screws on the motor plate.
tighten hard the handle
Step 5: Manufacture of the Left Handle
you must using your talent to folding the left handle :)
crush with a hammer the end which will be fixed on the principal handle
crush each corner and fold it with a vise
fix the result with a metal clamps
Step 6: Manufacture of the Battery Box
I had already made this box.
on the big plate, cut each side with a grinder and solder them together
solder 4 nuts on the base for fixing on wood later
(Optional), make a door with a hinge. for closing,welding a screx and making a slot in the door
painting the box
Step 7: Fixing the Battery Box to the Handle
cut a piece of wood plate to fix the box
take a meccano plate an deform it to screw the plate on the handle (2 time)
screw the box on the plate and put the battery into
Step 8: Electrical Connection and Drive Fixing
the electrical equipment is plug and play so connect them.
fix the esc on the handle with plastic clamps
Step 9: Installation of the Cutting Wire on the Head
cut 2 piece of B-C wire and put them on the holes.
tighten screw of maintain
measure the 4 ends and cut them at the same size
Step 10: Fixing the Remote Control and Deporting the Trigger
fix the remote on the handle with 2 metal clamps
take a metal wire and fix a end on the trigger.
fix with clamp a little pipe used to suide the wire
at the second end, add a metal ring of keys
Step 11: Test
you must test to choice the size of the cutting wire. too long, not enought torque. too small, not enought range.
I reduce the lenght at 10cm by wire.
Step 12: Paint and Enjoy
use spray paint rustproof and put 2 paint coating