Mill machine CNC progress

David G

Well-known Member
I decided to use Linux CNC.

I have decided to use steppers with linear feedback on the bed, which will make them act like servo's.

There are two fronts, getting the computer running, and mounting the mechanical parts on the mill.

Here is picture of little motherboard I got, did not know there are multiple pinouts of Intel I3 CPU's so have to get another CPU.

I have designed the motor mounts in Solidworks, they are 4x4 by 1/4 wall aluminum. I will post the layouts of them, once I figure out how to do that. I ordered a rotary vice for the mill so I could bore the holes, but the box came empty. I exchanging emails with the vendor trying to figure out where it went.
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The Linux CNC program communicates with the field IO via the parallel port, I have ordered a dual parallel port card.
 
I have downloaded Ubuntu Linux 12.04, it is installed on this stick, the PC will boot up on this and install.

I will have to load the real time kernel and Linux CNC once OS is up.
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You are well on your way. One suggestion is to use shielded cable for all signal level data transfer, and motor drive pulse feeds, Noise is a common stumbling block and difficult to isolate and eliminate. Jim
 
My biggest concern is sizing the steppers correctly.

I have to imminently decide wether to use 23 or 34 size.

Any advice?
 
If there isn't a big price difference, go big. You might want to use them on a bigger mill someday, if opportunity allows.

Also wondering, will this have a "home position" and travel limits? Will it need limit switches? Or is that somehow built into the scales?
 

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