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Posted by Martin H. Eastburn on May 8, 2008, 12:26 am
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Just come by a cool Wa-Wa pedal in a yard sale. I have one in the shop
my son left with me. Foot like a foot. Like on the woodies.
Someday it will be a TIG control - when it and the hand go out.
Or it will become another variable control. I'd get a go-no-go type
for on-off modes.
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
DoN. Nichols wrote:
>> wrote:
>>
>>
>>> The motors on the Singer sewing machines (e.g. my 221
>>> "Featherweight") are brush equipped universal motors, and will vary
>>> speed with applied current and with load to some extent. These motors
>>> will work with either DC or AC.
>>>
>>> The foot speed controls are variable series resistance -- done
>>> by a stack of carbon blocks which get squshed together by the foot
>>> pressure to reduce their resistance and allow more current through to
>>> the motor.
>>>
>> You might find this of interest, DoN:
>> http://users.goldengate.net/~dforeman/footpedal/
>
> That is a neat project. You tempt me to try to duplicate it.
> (But -- I would have to contour the bottom of the pedal so it would
> lock in the lid of the case as the original does. :-)
>
> Thanks,
> DoN.
>
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