Hood, you did mention it first, I was just not to sure what it did. I am looking for a board that can correct errors, not just stop on them. I think I can do that with a plug-in. At this point, and that cost $129, I think I will build my own close loop Mach plugin, if that is possible. Currently know NOTHING about Mach's plugins, yet :-)
My CNC is a simple 3 axis, home brew CNC. Nothing special. Here it is, with out the dust shield covering the X and Y. It was about 95% built at that point.
http://www.batbuilds.com/~adam/cnc_rev5/dsc05431.jpgI do not have a smooth stepper, yet. I think my CNC could benefit from one. I am trying to keep the total cost for my CNC down. But, if something will allow my CNC to run for 10+ hours, with out jamming (think closed loop with correction) I do not mind putting in a good amount of cash. I think the current jamming problem is from the computer. When I run slow, I have know problems.