CNC Rebuild

CNC Rebuild

I put together a CNC kit several years ago and I just wasn't satisfied. It moved too slow and it didn't have the heidth I wanted in the Z axis, so when I moved back to my home town I rebuilt it in my new shop. I added five-start screws, big captive bearings, and got rid of the belts in favor of direct drive.

I don't have a lot of photos of the original setup, but here's one. It had single start screws and this goofy way to limit the play on the screws.

SO the first thing I did was raise up the gantry with another extrusion.

Next I needed to anchor these to the original extrusions.

That was the front end. For the back end, I made a mounting plate that raises the gantry a little more and mounts the new bearing an the precision ground shaft.

Back at the front end, I made two mounting bracket assemblies to mount the other end of the ground shaft and bearing and the motor

I used a similar method on the Z axis. Added some cable chain and away we go.

I also added a dust shrowd for the router that hooks up to the shop vac.

Turns out the motors couldn't handle the added torque of the five-start screw, so I had to replace them too.

Here's a little video showing everything in motion.

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Here's the router cutting a template

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

Here you go!

Here's a little video showing how I do an angled neck pocket. For guitars with a Tune-O-Matic bridge you need to tilt the neck back about 1 1/2°, so I do a little math and use the rails to hold the body at an angle. For a 22" body blank, Y = 22 * sin(1.5), y = 0.576".

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player

So I decided to enclose my machine. I made a removable panel so I can still get in by the side when I need to. This should reduce the dust in my shop.

I also added some sounddeadening.

My neighbors should be grateful!

Top of Page