Mark Rages wrote:

>>> Windscreen wiper unit from a car wrecker?

>> But if someone has a good source of such motors (which includes
>> datasheets), I'd like to check that out.

> http://www.allelectronics.com/cgi-bin/item/DCM-249/400200/POWERFUL_WINDSHIELD_WIPER_MOTOR_.html

This is a very good price :)

Unluckily they don't provide much useful data. There are many wiper motors
out there, but so far I've been unable to locate datasheets for most of
them.

For this one, the only thing they say is "65 RPM @ 12 Vdc, 2.5 Amps
(no-load rating)". The no-load current is not really that helpful; the
stall current would be better. (FWIW, the one we're using now draws around
3.5 A no-load current and some 45 A stall current. So if this is any
indication, this one is probably weaker than our current motor.)

One thing I forgot to mention is that we're using it bidirectionally. I'm
not sure how relevant that is. Most wiper motors seem to be speced for
unidirectional only.

Thanks,
Gerhard

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist