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Quiet Stepper driver

John Huff
Prodigy 10 points
Other Parts Discussed in Thread: DRV8462EVM

We are designing a motor (& linkage) system to rock for our commercial product, which is a Bed.  We have tried alternative motors, and presently plan to use a NEMA 42 stepper motor. It needs to be as absolutely quiet as possible. I read your paper on reducing stepper noise and I have remaining questions. It was useful but lacked some details. Is there any updated info on this issue?

In any case, I want to know if you have suitable drivers for this size stepper, what the model number(s) are, and how much noise can I expect if running at low speed (12 rpm - 25 rpm) in our application?  My phone # is 310 766 4536, or email is john@floatingbed.com Thanks. 

  • 0
    TI__Mastermind 23250 points

    Hey John,

    What are the current specs for your motor?  I'm seeing a typical range of ~4.5A to 8A for NEMA 42 motors.  

    The DRV8462 was released very recently and would be a great fit for this size of motor.  The DDW package (currently available) can do 5 A peak / 3.5A RMS continuous current.  This device has Silent Step decay mode which is specifically designed to reduce noise.  It also has Automatic Microstepping which I've found does a very similar amount of noise reduction.  It has many other advanced features as well.  

    Beyond that device, for such high current you would probably need a gate driver.  The DRV8711 is your best option there. 

    Your best option for finding out the noise to expect is to order an EVM and test it out.  I think the DRV8462EVM is out of stock right now but you could try it's lower current version the DRV8461EVM.

    Regards,

    Jacob