Dremel tool problem

Discussion in 'General Electronics Chat' started by uriahsky, May 12, 2013.

  1. uriahsky

    Thread Starter Active Member

    Apr 27, 2009
    42
    2
    I have a Dremel Stylus, which is a great tool, but the battery leaked and distroyed the main pcb. I thought i would try wiring it up to a DC power supply but when I did at 9VDC with a 5 amp bench supply the tool was always too weak to do anything. Why can't i get any torque out of the tool? The voltage is the same as the battery and it only shows it pulling about 1 amp before stalling so I know i have the current. What am I missing?
    Thanks
    Russ
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,979
    744
    Try it on a 12V variable output, and when it starts to stall up the voltage.
     
  3. Sue_AF6LJ

    Member

    Mar 16, 2013
    45
    27
    what size wire are you using from the tool to the power supply?
    And yes 12V would be better...
    Also remember that a loaded motor draws quite a bit more current.
     
  4. uriahsky

    Thread Starter Active Member

    Apr 27, 2009
    42
    2
    I am using 12 gauge test leads and I will try it at 12 volts but the batteries were 4.2 volt X2.

    I watched the current draw on the bench PS and it only pulled about 1 am before stalling.

    I will try moving the voltage up when it stalls but that doesn't sound right. I can't really do that when using the tool and batteries don't do that in real life? You can't get 12volts out of a 9 volt battery can you?
    Thanks very much,
    Russ
     
  5. shortbus

    AAC Fanatic!

    Sep 30, 2009
    4,007
    1,530
    Did the stuff that leaked from the battery get into the motor? Maybe the motor commutator and brushes are corroded.
     
  6. Sue_AF6LJ

    Member

    Mar 16, 2013
    45
    27
    I didn't know what you had for batteries...
    12V may be too much.
     
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