First off, thank you all for your help.  It is appreciated.  Here is the latest data I have.  Some things are better and some things are stranger.

Chip,  your advice helped a bunch.  The feed rate was set to 6 and the percentage to +5% or something like that.  I changed both of them to 100.  It ran better but it still wanted to skip.  I set it to 50 ipm on all axises and, here is the strange part, I had to set the acc. for Z to 1, Y to 2 and X to 3.  Then I set the feed rate in my g-code to 50.  It worked beautifully.  It was fast but the quality suffered a little.  Now when I change the feed rate to anything else than 50 it skips again.

Anyone have any more ideas.

Thanks
Clint

Hi, Clint

In motor tuning set the Step&Dir Pulse's to 5, This will give your stepper control more time to see the Pulse's

Setting up Vel. & Accl. is a balancing Act !!, It's primarily used for Rapid Moves (G00) Your F?? set's your Cut Speed's and will override Vel./Accl.

Set the Vel. Up to a speed that it start's lousing steps then back it down by about 10%, Do the same process for the Accl.

Use a distance that will allow you to see the top Vel. and then return to a stopped condition, G00 moves.

I think your accl. may be set to low.

Have you run the Driver Test, It's located in C:\Mach3 Folder, Run it and see what it shows.

If you have large spikes in the graph you may need to clear up Windows.

Thanks, Chip

One last post (I hope).  Thank you all for your help.  After a lot of experimenting I have come to the conclusion that the problem isn't all Mach3.

Just a note for those who use the HobbyCNC package.  Set your board to 1/4 stepping.  Doesn't make sense but it works.  Using a 1/4-20 rod you end up with 16000 steps per inch.

Then I changed my motor tunings to 45 ipm and acc. of 10.  When I changed my settings to this it seems to work.

I have cut 3 complicated pieces and it never skipped.  Changed my feed rate from 30 to 16 and it still never skipped.  So thanks a lot everyone for your help.

Thanks,
Clint