losing Z after tool change

[windsors]

I am losing my Z location after a tool change to a drilling operation no problems when changing mills just drilling. After a tool change to a drill cycle the Z could be anywhere I have to re home the machine to correct it. I am using Mastercam x3 and running a Harding xv710 w/Fanuc control

All tool lengths are set correct and remain after the tool change and the machine z is set correct as it works fine after re homing

any idea what I am doing wrong? is my drill cycle set up incorrectly?
Thanks

[Matt Berube]

It sounds like this would be a LOT easier to diagnose if you post some actual .nc code that was performing incorrectly.

[Mike Mattera]

Most likely it's in your post. The first line after the toolchange is not being forced out, because it still thinks it's at that location (i.e. it doesn't know the machine has actually moved).

Usually in the toolchange sequence you'll find a line that says something z =9999 of z = c9k (c9k is a variable set previously in the post, that contains the value 9999)

Because it now thinks the z is at 9999, the next move to z.1 if different, so it outputs it.

But you should be able to force the Z output. look in the ptlchg section of your post for a line that says pzout and change it pfzout. This will force the Z output.

Mike Mattera