I'm using vex robotics rubber wheels, so the actual axle is square, so when threaded the nut only really uses the threads in the corner of the square because that's where the threads are the deepestiwonder wrote:Definitely with the same skidding at something like 12m, it's a track issue. Skidding sideways is something I saw a lot before I switched to softer wheels (for a few seasons, actually) that got rid of the skid.
I'm a bit curious about the axle.. are the threads only on the corners then or do you mean square threads?
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Re: Scrambler C
simplicity is key...sometimes
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Re: Scrambler C
Similar issue; our wheels skid upon launch (run time is about 2.00s) if the wheels/track are even slightly dirty. Be sure to thoroughly clean the wheels/track; we change the pad on our swiffer after every 2 runs or so to ensure the track stays clean every time we sweep it.
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Re: Scrambler C
Our solution for that was to add a track in the launcher that guided the vehicle for the first bit of acceleration, the wheels would still skid but it would at least stay straight. Because of the soft rubber and cleaning the wheels (by the way, the isopropyl evaporates and leaves a much drier surface than possible with water) we didn't have major issues with skidding, even at <1.3 second run times.fishman100 wrote:Similar issue; our wheels skid upon launch (run time is about 2.00s) if the wheels/track are even slightly dirty. Be sure to thoroughly clean the wheels/track; we change the pad on our swiffer after every 2 runs or so to ensure the track stays clean every time we sweep it.
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- InfiniCuber
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Re: Scrambler C
Little skidding issues with <1.3 seconds?? We have a car that goes 1.6-1.8 and we have skidding issues...iwonder wrote:Our solution for that was to add a track in the launcher that guided the vehicle for the first bit of acceleration, the wheels would still skid but it would at least stay straight. Because of the soft rubber and cleaning the wheels (by the way, the isopropyl evaporates and leaves a much drier surface than possible with water) we didn't have major issues with skidding, even at <1.3 second run times.
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Re: Scrambler C
Ours weighed ~550g(maybe 450? It's been a year since I weighed it) with an egg, and the vast majority of the weight is directly over the braking axle so the front wheels have a ton of traction. Plus they're the softest, smallest ones we could find. We did have issues with the back end skidding out when it accelerated, but we fixed that with a rail on the launcher that held it in line until the string released. We cleaned everything for every run.InfiniCuber wrote:Little skidding issues with <1.3 seconds?? We have a car that goes 1.6-1.8 and we have skidding issues...iwonder wrote:Our solution for that was to add a track in the launcher that guided the vehicle for the first bit of acceleration, the wheels would still skid but it would at least stay straight. Because of the soft rubber and cleaning the wheels (by the way, the isopropyl evaporates and leaves a much drier surface than possible with water) we didn't have major issues with skidding, even at <1.3 second run times.
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Re: Scrambler C
Hmm, makes sense. My car also has the great majority of weight over the brake, and the softest wheels, but i believe it is a bit lighter than yours, maybe 250 to 300 grams? I clean the wheels every run also. I'm guessing it is because my car is lighter, not sure.iwonder wrote:Ours weighed ~550g(maybe 450? It's been a year since I weighed it) with an egg, and the vast majority of the weight is directly over the braking axle so the front wheels have a ton of traction. Plus they're the softest, smallest ones we could find. We did have issues with the back end skidding out when it accelerated, but we fixed that with a rail on the launcher that held it in line until the string released. We cleaned everything for every run.InfiniCuber wrote:Little skidding issues with <1.3 seconds?? We have a car that goes 1.6-1.8 and we have skidding issues...iwonder wrote:Our solution for that was to add a track in the launcher that guided the vehicle for the first bit of acceleration, the wheels would still skid but it would at least stay straight. Because of the soft rubber and cleaning the wheels (by the way, the isopropyl evaporates and leaves a much drier surface than possible with water) we didn't have major issues with skidding, even at <1.3 second run times.
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Re: Scrambler C
Lighter might have something to do with it... The suggestion for solving it is generally rubber washers where the nut hits it's end stop, but it's a but late for major changes nowInfiniCuber wrote:Hmm, makes sense. My car also has the great majority of weight over the brake, and the softest wheels, but i believe it is a bit lighter than yours, maybe 250 to 300 grams? I clean the wheels every run also. I'm guessing it is because my car is lighter, not sure.iwonder wrote:Ours weighed ~550g(maybe 450? It's been a year since I weighed it) with an egg, and the vast majority of the weight is directly over the braking axle so the front wheels have a ton of traction. Plus they're the softest, smallest ones we could find. We did have issues with the back end skidding out when it accelerated, but we fixed that with a rail on the launcher that held it in line until the string released. We cleaned everything for every run.
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Re: Scrambler C
I have a rubber washeriwonder wrote:Lighter might have something to do with it... The suggestion for solving it is generally rubber washers where the nut hits it's end stop, but it's a but late for major changes nowInfiniCuber wrote: Hmm, makes sense. My car also has the great majority of weight over the brake, and the softest wheels, but i believe it is a bit lighter than yours, maybe 250 to 300 grams? I clean the wheels every run also. I'm guessing it is because my car is lighter, not sure.
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Re: Scrambler C
I don't know why I assumed you didn't...InfiniCuber wrote:I have a rubber washeriwonder wrote:Lighter might have something to do with it... The suggestion for solving it is generally rubber washers where the nut hits it's end stop, but it's a but late for major changes nowInfiniCuber wrote: Hmm, makes sense. My car also has the great majority of weight over the brake, and the softest wheels, but i believe it is a bit lighter than yours, maybe 250 to 300 grams? I clean the wheels every run also. I'm guessing it is because my car is lighter, not sure.
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Re: Scrambler C
It's alright, I just have been trying many things to try and fix it, but it isn't much. It is only about 10 ish cm conistently (which is better than the half a meter it was before lol)iwonder wrote:I don't know why I assumed you didn't...InfiniCuber wrote:I have a rubber washeriwonder wrote: Lighter might have something to do with it... The suggestion for solving it is generally rubber washers where the nut hits it's end stop, but it's a but late for major changes now
We recently got an increase in speed so just wanted to make sure i could handle the skidding.
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