builder83 wrote:I am doing something similar. I am just having the motor off switch engage about 1 meter prior to brake. The resistance in motor slows vehicle down so there is 0 skidding with wingnut brake system. This is more exact than a spring compression imo.
builder83 wrote:Well, I am rather clueless when it comes to motors also. I jacked a motor off an rc car and wired it with 2 switches (one to turn it on, and then one to turn off when wingnut hits it.) When the motor is off, the axle will still turn but with resistance. The car will stop roughly on its own in about 1.5 meters. So I set the brakes about 1 meter after the power is cut. I am using dual wide banebot wheels on my brake axle, and there is 0 skid. It works really well, I have my distances now within 1 or 2 cm consistantly, and fine tuning the steering with help of small rifle scope.
Full disclosure my car probably isnt the fastest (5 sec from .5 to 8.5) mostly because its heavy and only a 6v motor. But accuracy is much more important than speed with the scoring.
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