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Resistor Necessary?

Discussion in 'New users start here - FAQ' started by dieser, Jan 31, 2020.

  1. dieser

    dieser Member

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    8CFA9C80-DF36-4FEA-9211-AA148F64A092.jpeg

    can someone please tell me what the resistors used for in this project?
    to protect the motor driver?

    are resistors absolutely necessary?

    thanks
    dieser, Jan 31, 2020
    #1
  2. SeatTime

    SeatTime Well-Known Member

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    My Motion Simulator:
    AC motor, Motion platform
    Read the sabertooth 2 x 32 manual and all will be revealed.
    SeatTime, Jan 31, 2020
    #2
  3. dieser

    dieser Member

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    Thats what i found in Sabertooth Manual:

    Power Supply
    The main power inputs are labeled B+ and B-
    Sabertooth 2x32 connected to a power supply and voltage clamp resistors.
    Sabertooth 2x32 can be used with a suitably sized power supply. Power supplies used with a Sabertooth 2x32 should have output voltages between 7V and 30V. It is important to make sure the power supply being used can produce enough current for the load. Power Supply mode is selected by setting DIP switch 3 to the ON position. One major improvement in the third generation Sabertooth motor drivers is the addition of the Power outputs P1 and P2. These can be used with an appropriate resistor to
    dissipate the regenerative current generated when the device slows down or stops. This allows the use of power supplies without batteries or capacitors to absorb the regenerated energy. A calculator on the Dimension Engineering website will assist with choosing appropriate resistor packs. At least one of the power outputs should be configured as a voltage clamp when using a power supply.

    but i don‘t really get it, sorry....
    i plan to use ibt2 instead of a sabertooth, would it be ok to to connect a 24v power supply on one side and the 24v motors on the other directly?
    dieser, Jan 31, 2020
    #3