I have experienced a new problem today .  I am using the same g76 file I have used hundreds of times to thread on the lathe.

This machine has not been powered up in about a week . When my program runs the correct tool loads , moves to the correct position, spindle starts but the feed rate on the z axis is way off.  Usualy the feed rate is fairly high and sncs with the spindle speed and all is well.   Today the feed rate is just what ever the pitch value in the g76 line is.  In this case the thread is 20tpi so the pitch is .05  , the feed rate window reads .05 and the tool moves in the z axis at .05 IPM ,  change the p value to .1 , machine moves .1 IPM etc.


What has changed, why and how do I get the machine to thread again?  Is there a macro that needs to reloaded?

Is your lathe stuck in G94?
Hood

I do not know, if so how would I cancel?

The macro should I think cancel it but you should be able to check by looking at the mode active when threading, should say G95 at the top of the page. That is if the mode info is on the standard lathe screen, not sure.
 You could try the reset interp button, not sure if thats on the lathe screen or not but if not you could open the VB editor and type into the window
DoOemButton(102)

and then press the green arrow, that should reset mach to normal settings.

If you want to attach your xml I will check it out and see if I can find a problem.

Hood

I didnt see the mode active info on the lathe screen.

I did put g95 in the string at the top of my code and it seems to be running properly again. Thanks Hood