The challenge in the past for the DIY builder has been the electrical/electronic side of the equation. Since a large portion of people interested in the Home Shop CNC are more from a mechanical background, it's understandable that the electrical side presents a problem. We started out selling a THC controller and then introduced the lowest cost full Digital Torch Height Control on the market. We added in a lot of general interface electronics in the DTHC box that actually handled the motor signals and Input and Output from MACH. While that helped simplify the electronics there was still the issue of the Drive and power control and lots of wiring in building a table.
We did a few custom turn key electrical/electronic packages and the response was positive enough to help us decide to offer a fully integrated solution for all of the electrical and electronics for plasma and/or router applications. We see the choice of servo or stepper as a user decision based on cost and the job requirements. The stepper world has seen technology enhancements like the 740 Oz-in hybrid steppers we use in our packages, and better microstepping drives like the new Gecko 203 Vampire series. Servos have come down in price and we designed in differential encoder drivers/receivers to eliminate any potential noise problems with longer encoder wires.
So our PlazPak and RouterPak series of complete electronics lets a builder concentrate on the mechanics of the project. We even color code the motor cables and input plugs so you mount the Drive/Power electronics and plug in the Control Head with the Digital THC (on plasma models). No soldering,no wiring, ....no sweat! We even provide a remote interface card to plug in all of the table switches (Homes, Limits, E-stop) right at the table. Packages even include roller type Home switches with cables.
I know from building my own tables what caused me the most time and frustration was the controller wiring and hookup and I am an electronics nerd!
Look carefully at the different offerings. Don't fall prey to hype about technology or the claims of servos are better than stepper, or steppers are better than servo's. Much like Diesel VS Gas engines, they both have advantages and disadvantages for a particular application.
If you are worried that you won't have enough challenge in building your table if you buy a canned electronics solution, then just wait until you start using the table and software and have to figure out how to develop artwork and cut files!!
One thing about it. If you build your own table, and the quality of your mechanics and table are poor, you have noboby to blame but yourself. (:-)
Tom Caudle
www.CandCNC.com