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-   -   Brushless Xmod (http://tinyrc.com/forums/showthread.php?t=24802)

pointblank9957 06-06-2011 06:39 PM

Brushless Xmod
 
this is my project for the summer. a Castle Creations Mamba 6800kV powered 2nd Gen Xmod. this motor was just sitting around in my room gethering dust so i decided to make something.

this pic is of the mount that would house the motor: This was where i had to trim plastic away from the mount so the motor would rest level to the chassis.
http://i1227.photobucket.com/albums/...9957/mount.jpg

This is the mount with differential and spur gear with rear suspension mounts:
http://i1227.photobucket.com/albums/...tnwithgear.jpg

again with motor spacer:
http://i1227.photobucket.com/albums/...randspacer.jpg

motor at rest in mount without strap:
http://i1227.photobucket.com/albums/...inginmount.jpg

again with gears meshing:
http://i1227.photobucket.com/albums/...957/meshed.jpg

Motor in mount with strap: this part was tricky, trying to get the strap to fit around the motor i ended up using some longer screws and having a space between the strap and the chassis:
http://i1227.photobucket.com/albums/...orandmount.jpg

again front view:
http://i1227.photobucket.com/albums/...randmount2.jpg

next was the most difficult along with the bugs with servo centering. i had to convert a 5-wire servo into a 3-wire plug. this was done using an airplane servo:
http://i1227.photobucket.com/albums/...9957/servo.jpg

i took it apart and looked at the circut board. it converted 5 wires to 3 so i unsoldered the 5 wires from the pot and the motor inside the servo:
http://i1227.photobucket.com/albums/...servoboard.jpg

i slipped the board down inbetween the slot where the AWD Drive shaft would normally sit and soldered the wires according:
Servo Board Stock Servo
black white
white orange
red black

Motor Stock Servo Motor
black red
white black

http://i1227.photobucket.com/albums/...lectronics.jpg

Here is the whole car minus the esc and battery wired: i had a problem with the tires rubbing on the bottom of the motor, this was solved by longer screws and the hardest type of truck springs i could find.
http://i1227.photobucket.com/albums/...ismotorbec.jpg

whole car not wired:
http://i1227.photobucket.com/albums/...ngnotwired.jpg

car completed (messy):
http://i1227.photobucket.com/albums/...7/complete.jpg

heres a vid of the tire shredding apart:
http://www.youtube.com/watch?v=2szRNs1vRdg

can anyone help me with the issue of the servo not centering? the servo was a Tactic nano from a cessna.
http://www.youtube.com/watch?v=H_AqB00LNDM

smokin the tires:
http://www.youtube.com/watch?v=Mil3BfUbkQw

according to this site ( http://www.race-cars.net/calculators...alculator.html ) it has the capability to do 86mph. thats 174mph at 1 wheel!

im also trying to find a way to use the stock wire antenna instead of using the soft wire that comes on the receiver.

i may have found a way for the steering to center. using the pot from the tactic servo i used. i drilled out the sway arm from the old pot to fit the shaft on the new pot, i had to trim the shaft down about quarter inch to make it fit.

IT RUNS COMPLETELY PERFECTLY!!! HOLY **** I GOT THE STEERING TO CENTER!! YESSSSSS!!!!!!
http://www.youtube.com/watch?v=_aO8q770CoM

i now own possibly the fastest xmod ever.

heres a pic of the car with my Saleen body:
http://i1227.photobucket.com/albums/...complete-1.jpg


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