Bosch Classixx 1200 Express Drum not rotating

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  • January 17, 2018 at 4:00 pm #93089
    Ivor C&G Scarf
    Participant

    Everything appears to work on my Bosch Classixx 1200 Express apart from the fact that the drum does not rotate!

    I replaced the carbon brushes in March 2017 so that shouldn’t be the cause. I replaced [I think!] the motor 3 or 4 years ago. Could it be the motor again? [I’m sure I bought it from you but cannot find details.]

    [The belt is OK.]

    January 17, 2018 at 4:07 pm #453198
    electrofix
    Moderator

    Re: Bosch Classixx 1200 Express Drum not rotating

    brushes are always the first thing to check. pull them out and if they look long enough not to have gone look at the end. if its been in good contact it will be shiny and if its been sparking it will be dull and matt
    also check motor connections

    Dave

    January 17, 2018 at 4:24 pm #453199
    Ivor C&G Scarf
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    Thanks. I’ll check those tomorrow.

    January 18, 2018 at 11:45 am #453200
    Ivor C&G Scarf
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    Thank you – dust in the brushes. [Once you mentioned it I actually remember cleaning them previously.]

    January 28, 2018 at 12:35 pm #453201
    Ivor C&G Scarf
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    It has worked perfectly for a week then stopped. I’ve had the brushes out again but still nothing. [The end of the brushes is shiny.] The noise suggests that everything else is OK.

    Another suggestion, please?

    January 28, 2018 at 2:11 pm #453202
    Martin
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    Check with a multimeter that you have continuity between the motor terminals (3 sets of 2). If so the motor should be OK and the problem therefore is the connecting lead to it I would imagine.

    Giving us the full model number of your machine would help too. (inside the door).

    January 30, 2018 at 11:04 am #453203
    Ivor C&G Scarf
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    There is a connection between the terminal input on the motor to both brushes, [terminals 3 & 4]. There is also a connection between the brushes terminals and the disc which the carbons touch.

    There no connection between the earth and any terminal.

    Not sure what you mean by “motor terminals (3 sets of 2)”. [There is a connection between 5 & 6, and between 1 & 2.]

    Model number E-Nr WAE24162UK/01

    January 30, 2018 at 11:25 am #453204
    electrofix
    Moderator

    Re: Bosch Classixx 1200 Express Drum not rotating

    most motors have 6 terminals but some have 7

    you have 2 terminals for the brushes ( you say 3 & 4) with brushes in you should get a reading between 3 and 4. With brushes out you should get a low reading between 3 and one brush and 4 and the other brush

    you have 2 terminals for a tacho and the other 2 ( or poss 3) for a field coil. you should get a low reading on the field coil but a slightly higher one on the tacho

    Dave

    January 30, 2018 at 11:51 am #453205
    Ivor C&G Scarf
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    There are 6 terminals.

    1&2 give a high reading; 3&4 are the brushes; 5&6 give a low reading.

    January 30, 2018 at 1:37 pm #453206
    Martin
    Participant

    Re: Bosch Classixx 1200 Express Drum not rotating

    That then, more or less, confirms the motor should work and that the problem is the connection to it. Check the connector lead.

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