It was time for a new machine. My old one was getting tired and was starting to bind. I played around with the idea of rebuilding it, but it had some design flaws that I did not like, so I decided to build a new machine. For my new machine, I decided on a fixed bridge/moving table design for rigidity. I made the machine to be enclosed for dust and sound issues, but I didn't want to just put a box around the machine, I wanted the box to be part of the machine. It would give it more rigidity. Ignore the dates on the pictures. I forgot to set that on the camera
I started with the Z axis. The Z axis was cut on my old machine. It uses bronze bushings on drill rod.
The moving table uses MDF linear bearings on gas pipe. I made these about 6-7 years ago as a proof of concept and it worked so well that I decided to try using them here. The gas pipe sits atop an aluminum channel and the whole thing is bolted to the base of the enclosure. These things are pretty strong. I can stand on one foot on top of one of them without breakage. That's 215 lbs!
The bridge gantry is similar to Lionclaw's design and was cut on my old CNC before it got dismantled.
The bridge getting glued up.
Assembled. It's starting to look like something.
I put the electronics on the outside to keep them out of the dust (except for the Z axis)
The Z axis with a cable carrier installed.
I added some lights to brighten things up
I extended the sides of the table down to about an 1/8 inch away from the base and then glued on some vinyl I had laying around to keep the dust away from the MDF linear bearings.
The doors swing to both sides
Making chips(dust) !
Great job, and I like your linear bearing solution too.
By the way, that Jgro CNC is a great set of plans; one would be hard pressed to find a free CNC plan as detailed as yours.
So when can we get the plans for this?
what are the wooden spools on the motor for?