Einleitung

In this guide, you will learn how to repair a Vex EDR 393 motor in less than 5 minutes!

  1. This motors gears have been stripped! You can hear them clicking  inside of it. To fix this motor we will be replacing the gears in both the top and the bottom of the motor. This motors gears have been stripped! You can hear them clicking  inside of it. To fix this motor we will be replacing the gears in both the top and the bottom of the motor. This motors gears have been stripped! You can hear them clicking  inside of it. To fix this motor we will be replacing the gears in both the top and the bottom of the motor.
    • This motors gears have been stripped! You can hear them clicking inside of it. To fix this motor we will be replacing the gears in both the top and the bottom of the motor.

  2. Unscrew the four small black screws found in the corners of the bottom casing of the motor with a Small Phillips Head Screwdriver. Unscrew the four small black screws found in the corners of the bottom casing of the motor with a Small Phillips Head Screwdriver.
    • Unscrew the four small black screws found in the corners of the bottom casing of the motor with a Small Phillips Head Screwdriver.

  3. Pull off the bottom of the motor, you should find one large gear with teeth on the base, and one with teeth on the entire gear. Remove these two  gears. Keep these gears together until you are done. You will want to compare them with the new gears to ensure you have the right pair.
    • Pull off the bottom of the motor, you should find one large gear with teeth on the base, and one with teeth on the entire gear.

    • Remove these two gears.

    • Keep these gears together until you are done. You will want to compare them with the new gears to ensure you have the right pair.

  4. Your motor should now look like this.
    • Your motor should now look like this.

  5. Compare the gears you just removed to the new ones in your refurbishing kit. Select the top and bottom gears that match these two. If the gears you use do not go together the motor will NOT work. Take the gear that has teeth on it's entire gear and insert it onto the metal pin. Push it all the way into the bottom of the motor. It should connect with a small gear on the bottom.
    • Compare the gears you just removed to the new ones in your refurbishing kit. Select the top and bottom gears that match these two.

    • If the gears you use do not go together the motor will NOT work.

    • Take the gear that has teeth on it's entire gear and insert it onto the metal pin. Push it all the way into the bottom of the motor. It should connect with a small gear on the bottom.

    • Now, insert the larger gear with teeth on the base onto the circular plastic peg.

    • Make sure the gears are lined up properly and that they are "grabbing each other." Spin the top gear with your fingers a few times to double check.

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  7. Replace the black bottom of the motor, then  reinsert and tighten the screws with a Small Phillips Head Screwdriver to secure them to the motor. The small screws used in these motors are very susceptible to stripping so do not over tighten them.
    • Replace the black bottom of the motor, then reinsert and tighten the screws with a Small Phillips Head Screwdriver to secure them to the motor.

    • The small screws used in these motors are very susceptible to stripping so do not over tighten them.

  8. Flip the motor over so that it's top green casing is facing you.
    • Flip the motor over so that it's top green casing is facing you.

  9. Remove the 4 screws in the corners of the motors casing, being carefeul not to strip them. Remove the 4 screws in the corners of the motors casing, being carefeul not to strip them.
    • Remove the 4 screws in the corners of the motors casing, being carefeul not to strip them.

  10. Pull the casing off of the top of the motor Remove the two large, thin gears inside. The small gear on the left is attached to the motor module itself and cannot be removed.
    • Pull the casing off of the top of the motor

    • Remove the two large, thin gears inside.

    • The small gear on the left is attached to the motor module itself and cannot be removed.

  11. Your motor should now look like this.
    • Your motor should now look like this.

  12. Replace the old stripped gears with the shiny new ones from your kit. First, place the gear with the long stem into the bottom of the motor, making sure it catches on the little bit of gear sticking out. Next, place the smaller gear into the motor, making sure that it catches on both the tiny gear attached to the motor and on the gear we just inserted.
    • Replace the old stripped gears with the shiny new ones from your kit.

    • First, place the gear with the long stem into the bottom of the motor, making sure it catches on the little bit of gear sticking out.

    • Next, place the smaller gear into the motor, making sure that it catches on both the tiny gear attached to the motor and on the gear we just inserted.

  13. Place the green casing back onto the motor. When replacing the casing, notice the highlighted rubber collar. Be sure that the casing fits between the ridges on that collar. It should look like the example with the orange square.
    • Place the green casing back onto the motor.

    • When replacing the casing, notice the highlighted rubber collar. Be sure that the casing fits between the ridges on that collar.

    • It should look like the example with the orange square.

    • Reinsert and tighten the screws with a Small Philips Head Screwdriver.

  14. Your motor should be working again. Before reinstalling it on your robot, test it either with a backup battery or by plugging it in to your cortex. If you hear more grinding, or anything out of the ordinary, reopen the motor and inspect it to make sure everything is installed correctly.
    • Your motor should be working again. Before reinstalling it on your robot, test it either with a backup battery or by plugging it in to your cortex. If you hear more grinding, or anything out of the ordinary, reopen the motor and inspect it to make sure everything is installed correctly.

Abschluss

You can also use this process to change the gear ratio of the motor for different functions.

Ein weiterer Nutzer hat diese Anleitung absolviert.

Colin McInerney

Mitglied seit: 31.05.2016

101 Reputation

1 Anleitung geschrieben

does anyone sell repair kits from broken off wires. I have 30 motors with wires torn off (because of the 100 students)

Bob Hankinson - Antwort

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