Electronics DIY blog

DIY is fun and is food for the brain and spirit. Don't be afraid to learn.



Thursday, August 29, 2013

Building a CNC - X-Axis - part 2

As promised here is the reference side of the axis full mount.
Like I said in my early post the dimensions of my linear guide forced me to make a small change  to be able to properly clamp the linear guide bearing to the rail.
Here is a couple of self explanatory photos.

Clamp tube

Axis fixed side linear guide block fully mounted
Has you can see, the this forms a claw like bearing system that holds the axis in place.
Here are also a couple of shots of the arm in position.

Fixed linear guide mounted in the rail

Fixed linear guide mounted in the rail (down side)
This linear rail slides very well. Since the steel bar (ruler) that acts like the linear rail guide has a orange peel kind surface it's not as smooth has I would like but I believe it will become smoother in time.

Now to the other side of this axis. This will be quite easy and fast. That side will have a much simpler kind of bearing system to allow some level of structural distortion. I count on having it done tomorrow.

Hurray :-) ...

Wednesday, August 28, 2013

Building a CNC - X-Axis - part 1

So here are a couple a shots for the latest developments of my newest CNC machine.
I'm almost finishing the linear rail guide for one of the arms.
Like always some adjustments are needed.

Axis arm with linear guide supports welded


For example the rail guide bar is 8mm thick. That did not allowed me to put the spacers in the threaded rods that hold the bearings. After some evaluation I will need to redo one of the tubes that holds the bearing with an offset so it can clamp to the rail guide, and hold the arm in place (this is the side that locks the arm in the axis the other will be free to avoid misalignment errors).
I'll explain it better in my next post with the finished arm. For now this just shows a general aspect of the CNC horizontal axis arm.



Linear guide partial mount and testing

Expect to finish this arm soon.
Cya...

Monday, August 12, 2013

Building a CNC - Structure frame

So I've started building the new CNC with some steel tubing.
My welding technics are far from perfect but I think I can get the job done.
Here are a couple of shots from the structure. I have a few welding points to make to reinforce the structure but it's quite solid has it is. I can stand on it and it hold good.




So far I've made the cage frame and I'm starting to build one of the arms. I still have a lot to go before this monster starts moving.

Progress is slow but it is rolling...