I got my DIY system up and running yesterday and made my first cuts this morning. But I've got problems of which I'm not sure what they are nor how to resolve.
First I'll say I was running Linux/emc2 and had latency problems. Put in a new video card which helped a little, but not much. I changed to a Win2K system running the trial version of Mach3. I like Mach much better and will purchase it as soon as I need to cut over 500 lines.
But to my problem, I'm not getting anything close to a repeat cut between stepdown passes. I'm using 1/2-10 single start acme screws (and they came new with some backlash). I don't have any idea of what losing steps would look like on an actual cut. I also have no type of anti-backlash devices on my screws. (which I know I've got to fix)
By viewing the attached image, can anyone tell if it's backlash or what is my problem. I used an 1/4" upcut spiral endmill on MDF, so I know I used the wrong type bit, but the roughness of my cut is the least of my problems right now. I cut a simple area clear around a circle (in three passes), and then a profile cut around the outside (in four passes).
I also quit smoking about two weeks ago and I'm ornery as hell. And these CNC problems aren't helping.