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Posted by Wayne C. Gramlich on April 20, 2008, 12:04 am
Please log in for more thread options Curt Welch wrote:
>> JonMarkGo wrote:
>>> Will this motor:
>>> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=403-10
>>> 06-ND work with this driver chip:
>>> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=497-29
>>> 36-5-ND ?
>> Very likely, but be sure the stepper doesn't try to draw more current
>> than the L293D wants to provide.
>>
>> A Google search for 'l293d bipolar stepper' turned up up the following
>> on the first hit. Looks pretty promising:
>>
>> http://mechatronics.mech.northwestern.edu/design_ref/actuators/stepper_dr
>> ive1.html
>>
>> -- Gordon
>
> Just curious....
>
> The spec sheet for the stepper says the 35L048B1B-N is 5V bipolar with 11
> ohms resistance per winding which I calculate as 454 ma (5/11) (not
> counting voltage drop in the driver), and the L293D says good to 600 ma.
> Is that all you need to do to calculate the current requirement of a
> stepper when the spec sheet doesn't give a current rating? Or are there
> other issues to think about?
Consider using the SN754410 which is pin compatible with the L293D,
but has almost twice the current capacity.
It might be prudent to measure the actual coil resistance of a few
of the steppers before totally relying on the spec. sheet. Sometimes,
the manufacturer changes the manufacturing process (changes wire gauge)
without updating the spec. sheet.
-Wayne
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> Will this motor:
> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=403-1006-ND
> work with this driver chip:
> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=497-2936-5-ND
> ?