Re: [CAD_CAM_EDM_DRO] Wire Gauge for Stepper Motors

Kory:

The name of the game with steppers would be to keep "voltage drop" as low as
practical, since there is ALREADY quite low voltage (2 to 5 volts per
winding, I'd guess). American Wire Gauge ("AWG") #26 is "good" for perhaps
500 mA, if shorter than 5 feet! For 1.5 amps, I'd want at least #20, though
some may argue #22 is OK. Actually, I'd use #18 if the leads were over three
feet long, motor to driver-terminals!

There are "wire charts" showing the ohms/foot for standard AWG sizes; I have
ONE "reference manual" published by Radio Shack in the last Century, and it
has a "wire table" with other such info as "turns per linear inch" and so on,
as well (for those of us who do our own transformers, sometimes, etc.)
Another wire-chart I sometimes have to dig-out is in the ARRL annual manual
(now a HUGE heavy volume!), as it has some "data column" or is it gauge-size?
that the RS manual doesn't have. I've never tried, but you can PROBABLY get
such a chart on-line, as well!

Jan Rowland


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