our robot at first gets verry fast but only for a minute then it’s slowdown and cannot move at all ( battery is full) ( and it not cause by friction)
Put your hand on the motors. Are they hot? If so, then it’s a build problem. If not, it is probably a code problem. Could we see a snippet of your code?
(Side note, try to put a 1/8 in plastic spacer between shaft collars and the c-channel. Never have metal to metal contact)
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looks to be warped, also looks like you have metal on metal contact on the big gears, the motors are probably overheating aswell as you are running a very fast gear ratio.
there is a lot of reasons that could be causing this so i would make a checklist with some of the issues i found
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Definitely sounds like motor overheating. Your drivetrain has way too fast of a gear ratio for a 4 motor drivetrain and the motors will overheat once any form of strain is put against them. You should lower the gear ratio to add more torque or switch to a 6-motor drivetrain
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Thank you everyone, problem fixed.
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