Hello. I've been looking at and admiring the builds I see here. I have been looking at building a router table so that I can build new cabinets for my kitchen and bathroom. Two things that would make it more user friendly would be a precision router lift and a precision fence. All of the homemade router lifts I have seen are made from wood which is OK but can cause issues. The router lifts that are available for sale range from $200-$400. They can be precise but wouldn't be able to quickly return to a known bit height after changing bits. So I'd like to design a CNC router lift using V-slot rail. That way when I change bits I can use a piece of copper coated circuit board to return to a known point using conductivity. This is a design I came up with. It is simplified, lacking the drive system and connectors. But should give you some idea of what I would like to accomplish. The router motor is fairly heavy, about 18 pounds. That's just a 2 1/4 HP router. Something over 3 HP would be better yet. So I am thinking about using galvanized aircraft cable to run from the top of the carriage, through a pulley inset into the top of the V-rail, and a counter weight running down the outside. I would do one assembly on each side. That way I can cancel out the weight of the router so the stepper motor doesn't have to work too hard. How much holding power does a stepper motor have? I was thinking about using a Nema 23 with an acme thread to drive it. Is the holding power of it going to be enough to keep the router from moving during operation. The other part of the project is the fence. It can be as simple as a piece of wood clamped to the table. But I would like something with precision and repeatability. Incra makes a fence that fits the bill but it costs $459 bucks. http://www.amazon.com/Incra-LS17WFNCSYS-17-Inch-System-Presses/dp/B0007UQ2CI Plus a CNC system would have added benefits like being able to change positions with the touch of the button when make multiple passes. Normally you would set the fence to one position and run all of your pieces through. The adjust the fence and run them through again and repeat. With CNC I could run all of the passes on one piece and then move to the next piece. So it should save a bit of time. Anyway, here is the basic idea I have rolling around. Two pieces of 20x80 with the bottom piece fixed to the table. A NEMA 23 is mounted to the bottom piece and drives an acme thread rod through the top one. The fence is attached to the top piece. I drew up the front wheels attached to the bottom piece and the back wheels attached to the top piece. That way they would always be as far apart as possible. I'm not sure if that is the best way to go about it or not. I also drew up an idea for making the fence more rigid using 20x20 to triangulate the fence to the 20x80 that it attaches to. And if that doesn't work out I could also add 20x20 to the sides of the table and have wheels attached to the sides of the fence that ride on it. Or I could do both. Anyway, I'd love to hear any suggestions that you may have for this project. This will be my first time working with V-track and stepper motors. So I'm pretty green. But I've played with CNC mills, done some manual G and M coding, and have a technical background. I've got an order in for some v-rail, wheels and misc parts. But they were out of the 20x80 and 20x20 when I ordered. So I've got some stuff to play with in the mean time. ETA - Here is how they relate to each other.