This model shows the helix parametrized by x=cos(t), y=sin(t), z=t for t=0 to t=5pi.
There are several print options: the helix can be thick or think, and have the equations imprinted on it or not.
This model was designed and printed by my WLU summer research student Ryan McDonnell ('17).
We printed both helices on the FormLabs Form 1+ printer. The thin helix (with equations) was printed in black. It is really fine, with diameter about 2mm and is almost too delicate. The regular helix (with equations) was printed in white. It is quite robust, though the equations are hard to see. We recommend printing in grey resin to see the equations clearly. The .form file is included for the black thin helix.