I've been trolling the forums for the past few weeks an have been really inspired by some of the machines that I have seen posted. I decided it was time to take the plunge and build one for myself as I can think of quite a few woodworking and electronics projects where the precision would come in handy. So, I spend about two weeks collecting/ordering parts, as well as drafting up a plan for the machine itself.
The hardest part for me was making design decisions for the machine based on the different feedback it has recieved in the forums. Things like fixed versus moving bridge, skate bearings versus bushings, etc. So, with this being my first machine, I decided to take a conservative approach, and borrow alot of the decisions from machines posted to the forum that were iterated on. Most of my design was inspired by jgro's second machine.
The specs 'thus far'
* Approximatly 17 x 16 x 5 cutting area
* Fixed bridge, moving X axis table design
* The Y and Z axis are supported with 3/4" drill rod riding on oilite bushings
* The X axis will be supported on 1" drill rod riding on oilite bushings
* All three motors are 116oz/in Pac Sci
* Driven by a Xylotex board with a 24v 6amp power supply
* Using 1/2-10 Precision ACME lead screws and home made Delrin nuts
I began construction three days ago, and have mostly completed the Z and Y axis. I still need to get the motors and screws mounted, then move to the X axis and table. Finally, wrap it up with some paint.
I wired up the motors/powersupply/driver board last night and had the motors turning with Mach2 (I know the superstition, but I'm too invested now to quit). I'm really looking forward to getting them mounted on the Y and Z to see it come to life. My first designated project for the machine (once I get the hang of it) will be to create a nice 1/2" baltic birch case for the electronics.
So enough talk and on to some pictures. I'll try and stay active on posting my progress...and plenty of pictures. I can appreciate how much the pictures helped me when I was designing.
(if your curious why the MDF looks two different colors, I shellac'ed some of the pieces to prevent any premature moisture damage before I got around to painting it)