[alandudley]

I am brand new to the cnc machining world. I just purchased a mid 80's LB 15 and got it started up. I wrote the first simple program through IGF and ran twenty or thirty test parts with no problems. I wrote the next program using g code and now I am having very frequent alarms 103-4, 103-3, 102-3. There seems to be no rhyme or reason to when they occur or which one occurs. They seem to happen during the rapid traverse part of the programs. When they first started happening I would add a G01 in just before the line where it happened and it would seem to help however I do not believe it is the program because sometimes the part will run and sometimes it alarms. I have spent allot of time reading the posts here because yall are awesome. If it weren't for this site I do not believe I could have gotten the machine running by myself.

[dr jay cnc]

This sounds like an encoder error on the machine. You can get around the problem for a short time by setting the Rapid override down to a around 50% - but that will only last for so long.

You state that you are new to the CNC machining world - you may want to find a good local service guy to check out the machine wear on the ways and gibs and proper lubrication of the ways.