In thread406-103836, which is a couple of years old now, diamondjim provided an Autolisp routine for drawing involute gears in Autocad. The routine works great. However, I wasn't able to follow all the equations in the routine to verify if this draws a true involute. It looks similar to involute equations I have seen, but isn't exactly like the ones I am familiar with. I will use this to creaste an internal spline and am concerned about how it will fit the mating external spline.
Can diamondjim or anyone else verify if the equations here will create a true involute curve.
Thanks.
Phil
Can diamondjim or anyone else verify if the equations here will create a true involute curve.
Thanks.
Phil