This is what happened to my motor pinion gear after a few minutes…anyone know why a metal gear would do this after such a short amount of use. Gears were meshed, loctite added to motor screws, to motor pinion screw…not sure what else can be done to avoid this happening again…any ideas???
Note: Gears are both the right mesh too, 1 mod and this is a 14T gear supplied by hobbyking that matches the central diff gear also from hobbyking…
Is it possible that the motor axle has an incorrect distance form diff Gear? Sometimes the motor on RC car can be adjusted moving it close or far in order to reduce the play and contact distance between the gears. I think that the gears are supposed to match each other with virtual no play and engaging the teeth at a correct distance. Too close and the gears are noise and probably have too friction… Too far and the gears touches only on a small portion of a tooth that sustain all the torque and wear out quickly… Probably the gear in the photo run too far from the matching gear.
Don’t use a metal spur gear
i dont see any grease, did you clean it befor you took a photo ?
Looks to be a gear mesh issue. Here is a good guide for setting gear mesh http://www.rccaraction.com/blog/2011/11/15/think-you-have-good-gear-mesh/
Whats it made of?
It’s made of steel…I meshed the gears as good as I could…I used heavy duty grease but after a few seconds it gets spun off…any suggestions to using a different grease?
No grease needed, it’s all gear mesh. Check out my link above.
Their might be binding in the following gears when its running, it looks like sliping gear kind of damage, was it making bad noises?
@Peter_Parnell they come stock with plastic for a reason
the car motor slips to start with to overcome high torque when pulling away and maybe a little friction you get in a 3d printed assembly, but I assume the trakster motor i am using (one recommended by daniel noree) has slippage built in? motor slippage is supposed to prevent damage to pinion is it not? The pinion and spur gear assemblies are metal as recommended by Bitfrost on Thingiverse. He siad he is running this without any problems. They are the standard pair sold by hobbyking. here are the details: Central Diff. Complete (1Pc/Bag) - 33154 1 US$8.70 IN STOCK
Motor Pinion 14T and Grub Screw (1Pc/Bag) - A2016T 1 US$2.66 IN STOCK
No matter how i set up the pinion and central diff gear it is noisy when it turns. If you turn the central diff on its own it is super quiet but when combined with the motor and pinion it sort of has an unsmooth feeling when you rotate the motor shaft, like its the magnets. I think this is normal but when meshed togetehr you get a sort of noisy clunky feel as you rotate. Again maybe this is normal. everything is new and as recommneded by Daniel Noree and Bitfrost so I can only assume it is for anotehr reason I have wera problems so quickly?
I have invested hundreds of pounds in this project so really hope someone can help me solve it so I can pass the car onto my son so he can enjoy it without too many problems every five minutes!
i can only tell you what i used, and its working:
im using the spur gear from this:
(Spur_Diff_57_mod08_GearV3.STL)
printed it on my Replicator2x
and then combined it with this Diff:
HSP 02024 Diff Complete (from ebay)
as a pinion you can use these two:
Robinson Racing RRP-1714 or RRP-1716 (ebay)
i think i used the 1716, but im not sure…
Motor/ESC i got from Hobbyking:
Turnigy TrackStar Waterproof 1/10 Brushless Power System 4000KV/80A
and using grease will ind the Diffs and Spur gear will help reducing the stress on these components.
for me its working very well, never had to replace any part of the drivetrain
ok…problem (sort of) solved…the 12T pinion gear shown in the photo from Hobbyking (part number: A2016T 1 ) that matches up with the central diff gear (part number: 33154 1) was the problem…the one in the photo is obviously a horrid mesh and was from new…I have just received a hpc 14T pinion gear and it meshes BEAUTIFULLY. The problem is still the motor is coming loose after running the car for 5 minutes. As the motor gets very hot is softens the 3D printed mount and the motor becomes loose. I have tried bulky washers, doing up very tight with threadlock but to no avail.
Anyone have any other ideas to overcome this problem once and for all as the rest of the car is reliable now…
Is my only option to add a heatsink to the motor now? is anyone else doing this? If so which one fits Daniels design?
what Motor/ESC are you using? If the temp is high enough to melt the ABS or PLA then the motor is defn. to hot for some reason.
im using the ones Daneil Norree recommended on the build the standard turnigy ones from hobbyking…its the same ones you can see in Brandons photos of his new build.
is it this one?
http://www.hobbyking.com/hobbyking/store/__25138__Turnigy_TrackStar_Waterproof_1_10_Brushless_Power_System_4000KV_80A.html
what battery are you using ?
