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Build a
Universal
Coil Winding
Machine
David J. Gingery
Copyright 0 199 1 David J. Gingery
3 18, Rogersville, MO 65742
Web:
Email: gingery@
In this project our mechanical challenge is to mount the coil form and rotate it in a positive
relationship with a counting device so that a specific number of turns can be layed on the form
in a neat pattern. Quite simple in the case of mon solenoid or close wound coil on a
cylindrical form. And only slightly more challenging if the turns must be spaced rather than
close wound. But when the required pattern is what e to be known as "Universal
winding" the challenge is somewhat greater. Then a mechanism must be added to guide the
wire in a transverse pattern while keeping count of the number of turns. In the design
presented here the transverse motion is provided by a cam to convert the rotary motion of the
crank shaft to the straight line motion of the wire guide. A simple friction wheel and plate
plishes a right angle in the rotary motion to drive the coil form. And another cam
operates the counter plete the mechanism. A simple cone chuck or slit chuck holds the
form and an assortment of cams provide for a variety of widths while the variable ratio
friction drive allows any transverse pattern within a wide range.
The design presented is not original except in its adaptation mon materials. Hand
operated machines operating on this same principle were widely marketed for many years so
the concepts are well tried. The units that mercially available a number of years ago
were built upon die-cast frames and they used die-stamped sheet ponents that are
impractical for individuals to produce at home. The objective in this adaptation is to
plish the same effects monly available items and without the use of machine
shop equipment. A lathe would prove useful but is not at all necessary. A drill press is
preferred but all of the drilling can be done with a hand