Stalling out

[Flyin Hawaiian]

What is wrong with these things. I took it out today it ran good except on sheer face climbs and under cuts. It would just stall out. I cranked the slipper so its not that. You can hear the motor and esc trying but nothing.
It will only if i front dig up the face. What am i doing wrong?
Ive done everything to make it work better took 1 shim each side and loaded the axles with grease.

castle creation sidewinder
HH 35T
25c cont 50c burst

[latentimage74]

if its stalling out and the slipper is cranked down and its not in a bind then it is probably an electrical issue.

[Rockcrawler]

Originally Posted by Flyin Hawaiian

castle creation sidewinder
HH 35T
25c cont 50c burst

That is the problem. Like many of them have said, the brushed motors are not going to work well.

TEDROCKZ Losi does the same thing. He is running a 35t too.

[biged]

Add another to the list my tekin 35T dose the same thing.
And smokes alot to

[Robbob]

mine just started doing this today. had the slipper set great, slipped under holding the rig then today it just started slipping at a climb. cranked it down and then the motor started stalling.

thought it was the motor i had in it then switched to another motor, first one 35D second one a 35S. both stalled at an incline.

[roundguy74]

this happens even with brushless motors i have been dealing with all kinds of problems on mine including the slipper not working think i have got this figured out but i cant climb anything that doesnt have at least a bumb in front of it wont go up a rock face if the front wheels have to pull it up. Been looking over diff sights for fixes. And have been trying diffrent things out to fix all my problems think i might have got a lemon.

[kineteks]

I'm thinking this is worm gear friction at work. Mine does it too. I've gone through the drive line completely, cleaned an re-lubed everything with the finest greases/oils I can find. It's very free running on flats, I'm getting over 30 min on a 1350 pack on backyard sized rocks, but as soon as I stick the front wheels on a vertical or near vertical face, or jam a wheel in a crack... it slips the slipper a little and stalls. This seems to agree with what I read about worm gears. High load wipes the lube off the gear faces as the worm & worm spool mesh and the gear goes metal to metal. At that point the friction goes through the roof and the motor stalls. The interesting thing is most of the gear reduction is in the worm, where the friction is. The motor doesn't have the reduction through the tranny like a more conventional set-up so it can't overcome the friction. It'd be like running the pinion/spur way too tight, the motor would heat-up and stall whenever you put a load on it. In our case it's the major reduction itself that's killing the motor. It's also possible that more power will just bind things up harder...?

[70duncan]

[QUOTE=kineteks;1834792]I'm thinking this is worm gear friction at work. Mine does it too.....

I think you are right. I am running a brushed 55t and 20tooth. The only time the motor stalled is when going up a vertical or under cut face. The only way I could get up was to use the dig. I think this is part of the drivers learning curve. The team drivers said that we would have to get used to driving this type of axle . I have also noticed that it stalls more often when the rear tires have good traction going up the vertical or under cut faces. Even with the dig, the rear tires will hold the rig and not let the rear go backwards to allow the front to start pulling.

I guess this shows just how well the worm gears work.

This is my first 2.2 ( been running supers for a couple of years) and I am glad that I bought it. This is a great truck!

[thehopping1]

I wonder if it would help to volt up and gear down some. If you have a 3s and 15 or 16t pinion try and see if that will work. Might take some pressure off the motor.

[2500hdon37s]

[QUOTE=70duncan;1834913]

Originally Posted by kineteks

I'm thinking this is worm gear friction at work. Mine does it too.....

I think you are right. I am running a brushed 55t and 20tooth. The only time the motor stalled is when going up a vertical or under cut face. The only way I could get up was to use the dig. I think this is part of the drivers learning curve. The team drivers said that we would have to get used to driving this type of axle . I have also noticed that it stalls more often when the rear tires have good traction going up the vertical or under cut faces. Even with the dig, the rear tires will hold the rig and not let the rear go backwards to allow the front to start pulling.

I guess this shows just how well the worm gears work.

This is my first 2.2 ( been running supers for a couple of years) and I am glad that I bought it. This is a great truck!

i also run this set up but mine seams to barley enough speed but just enough tourqe to get where im going but it doesnt stall much

[Robbob]

Originally Posted by thehopping1

I wonder if it would help to volt up and gear down some. If you have a 3s and 15 or 16t pinion try and see if that will work. Might take some pressure off the motor.

tried 11, 13, 14, and 15 ...... all did the same thing with my slipper locked. i was climbing fine the night before. also tried a 27T from a Green Machine2 @ zero timing and it did the same thing with those pinions.

[kineteks]

Maybe we're wiping the lube off the gears. Robbob, that could be why yours just started doing it one night and now does it with every combo you've tried. Have you re-lubed the gears since you've had the stalling? I have a hole drilled in my axle case that allows me to add lube to the worm spool without taking everything apart. I'm going to get it to stall on a vertical, add some fresh lube and try it again.... if I can get to it tonight I'll post the result.

[Robbob]

Originally Posted by kineteks

Maybe we're wiping the lube off the gears. Robbob, that could be why yours just started doing it one night and now does it with every combo you've tried. Have you re-lubed the gears since you've had the stalling? I have a hole drilled in my axle case that allows me to add lube to the worm spool without taking everything apart. I'm going to get it to stall on a vertical, add some fresh lube and try it again.... if I can get to it tonight I'll post the result.

ill check tonight, did notice grease on my output bearing and shaft so i could very well have melted it. used synthetic marine grease, going with Lucas Red tonight.

[Robbob]

Marine Grease was still there, was very thin like it broke down around the gears. Wiped clean and changed to Lucas high tak but didnt change the stall.

I took the tranny apart and cleaned all that out, check all bearings and end play, still clean and free.

Pulled slipper apart and changed it over to a spring style like the Losi buggies have, Ill post pics tonight when I start my build thread. Slight stall from dead stop climbing a wall, just how I like it.

[kineteks]

I tried the re-lube last night. Coated the worm spool with fresh Gear Jelly and spun it over slowly. First attempt on the vertical w/lip that I use as a test, same exact stall as before the re-lube, so that's not the problem. I have some extreme pressure grease coming in today, I'll give that a shot. After that I'll try some moly-dry spray that I used on 1/8 on-road clutch thrust bearings and then? There seem to be a number of lubes that are working for different folks so it seems like no one type is going to be head-and-shoulders better than another. As suggested this rig may just require a different driving style and approach to certain types of terrain. I love the stuff this truck does well, it's amazing really, and maybe some of these issues are just gonna be the cost....

[Ralphy]

As far as brushed motors go you could go with a 21T or 23T Traxxas Titan motor. On 3 cell lipo and with a 15T pinion mine will go right up to a sheer vertical face and crawl right up no probs. My lipo is a 35C 1300 and this motor flat out works....and I am gonna keep posting up everywhere until some more of you give it a shot. I am very pleased with the slow speed control and the top end. Trust me it's worth the $20 to try it you will all be suprised. My motor is the 21T I believe, it is all worn out and like 4 years old after running a heavily modded e-maxx for months then sitting in a box for 3 years or more, I am actually going to pick up a new one soon just to see how much better it will be. oh and after approx. 20-25 total run time, climbing rocks and logs, testing at Rubbanecks, running some full speed passes through thick grass, and the short vid I posted of it popping wheelies, i charged the batt. and put 1200mah back into it so I would say it's pretty efficient on juice. It took 15 min. straight to even get the motor warm/hot (@140* est. by Rubba) and the esc was still cool. I am using a sidewinder.

[Flyin Hawaiian]

Do like the 21T titan motor it work much better the any brushed motor ive tried. Nice and smooth.