You can't drive a motor directly off the parallel port. First the max drive current for a parallel port is about 15ma (.015 Amp) and it's at 3.3 to 5 VDC. It's made to drive a MOS chip inside a printer. Even some motor drives need more current than that to operate.
All parallel port from software (EMC, MACH3, TurboCNC,) use Step and Dir signals. The Step would be considered the "clock".
You are going to spend a lot of time putting together a table that will in the end be worthless (except for entertainment). Few if any of the parts will be usable in a bigger design and bigger designs with bigger motors will need different gearing, slides and linear motion components. You will end up going a lot of it twice...true you will learn from the mistakes, but if you invest an equal amount of time reading and studying this forum and the hundreds of machines users here have built it will be like going to CNC college.
Tom Caudle
www.CandCNC.com