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Einleitung

This guide will show you how to clean your iRobot Roomba 4100’s optical sensor. Cleaning the sensor is one way to fix a common problem known as the “Circle Dance.” Where your iRobot continuously spins in a circle.

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  1. The Roomba Battery is the central yellow block under the Roomba's front bumper. Refer to the top of the graphic.
    • The Roomba Battery is the central yellow block under the Roomba's front bumper. Refer to the top of the graphic.

  2. Remove the battery by pressing the tabs on both sides of the device, as demonstrated.
    • Remove the battery by pressing the tabs on both sides of the device, as demonstrated.

    • Gently lift the battery up and out of the device.

  3. Purchase or obtain a replacement battery from the manufacturer. Then simply drop the new battery into place.
    • Purchase or obtain a replacement battery from the manufacturer. Then simply drop the new battery into place.

  4. Begin by removing the rear particle bin.
    • Begin by removing the rear particle bin.

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  6. Next, locate the three screws on the iRobots hubcap/wheels. (You only need to unscrew one side)
    • Next, locate the three screws on the iRobots hubcap/wheels. (You only need to unscrew one side)

  7. Using a Phillips Head screwdriver, remove all three screws on the side of the hubcap of the wheel.
    • Using a Phillips Head screwdriver, remove all three screws on the side of the hubcap of the wheel.

    There are actually 4 screws holding the hubcap on. To get to the 4th screw, you need to loosen the top cover by removing all its screws. Note different lengths of screws.

    Albert Jeans - Antwort

    yes found that out during this operation

    MaryAnne - Antwort

  8. Gently slide the hubcap up and out of the wheel well of the Roomba.
    • Gently slide the hubcap up and out of the wheel well of the Roomba.

    I have a fourth screw well up into the body on the hub cover. ~2.5cm into the body from the round hub outer circle.

    Ben Carr - Antwort

  9. Notice the wires attached to the hubcap. These are directly connected to the optical encoder.
    • Notice the wires attached to the hubcap. These are directly connected to the optical encoder.

  10. Using a can of compressed air, gently spray and clean the optical encoder until the dust had been removed.
    • Using a can of compressed air, gently spray and clean the optical encoder until the dust had been removed.

  11. Using a screwdriver, gently remove the drive belt from the gear. This is the rubber band wrapped around the gear shaft.
    • Using a screwdriver, gently remove the drive belt from the gear. This is the rubber band wrapped around the gear shaft.

  12. Slowly lift the gear from the gear shaft. Make sure you do not lose the drive belt.
    • Slowly lift the gear from the gear shaft. Make sure you do not lose the drive belt.

  13. Thoroughly clean the exposed area of the wheel using either compressed air or a moist cotton swab. Be mindful of the exposed inner drive shaft when cleaning the wheel area to prevent any preexisting dust from entering the drive shaft.
    • Thoroughly clean the exposed area of the wheel using either compressed air or a moist cotton swab. Be mindful of the exposed inner drive shaft when cleaning the wheel area to prevent any preexisting dust from entering the drive shaft.

    my hubcaps have 4 screws. it makes it muh more difficult.

    Don Paulgaard - Antwort

Abschluss

To reassemble your device, follow these instructions in reverse order.

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Cal Poly, Team 20-7, Maness Fall 2010 Mitglied von Cal Poly, Team 20-7, Maness Fall 2010

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Thanks for your advice. I cleaned the sensors on the wheels and still the unit was having a circular dance. From another site mentioning another model there could be a problem with the sensors behind the front bumper bar and yes that was the problem. They needed blowing out with a strong air gun. Now after extensive cleaning my Roomba is running like a dream :-)

photofil - Antwort

My problem as well with my Roomba scheduler. The black and white front wheel housing was packed with rug fiber. Cleaned it out and all is well.

Also have a roomba discovery. It has a different front wheel with out any apparent sensor.

Will Long - Antwort

I have a roomba4100 it will turn on it will try to go but will stop after 1second don't know what's wrong could it be the belt

Rodney - Antwort

I have a Roomba from 2002 (before the 400 series. This tutorial looks like it might apply, but I can only get 2 of the 3 screws off the hubcap of the wheel. The other one is blocked by the top cover.

Stephen Martinson - Antwort

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