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Baffled By Z offset changing between tool changes

Jeremy Sawatzky

Plastic
Joined
Nov 16, 2021
I have a Milltronics MB-20 cnc. - I am running a basic part and everything is going fine until I move to change to another tool - all other tool changes prior to this one were fine.

N9024 is where the trouble happens, you can see the z offset suddenly shift. - what this results in is my next tool sitting about a half inch above my part cutting air. - I am transitioning from Tool 7 to Tool 9 and I have rechecked and reset my offsets half a dozen times. I am a novice to this game so maybe I am missing something brutally simple. I am programming using HSMworks and haven't encountered anything like this before.

Below is a video of when it happens. - I cant see a command in my g-code that is causing it to leap like this.

- problem is at the 48sec mark

issue.JPG

Thanks
 
Last edited:

Nerdlinger

Stainless
Joined
Aug 10, 2013
Location
Chicago, IL
Like Matt said, G43 is invoking a tool length offset…which one? The one on the following “H” word. In your case you are calling up Tool #8 on sequence number 9018 but Length Offset #6 on sequence number 9024.

They do NOT always have to match…maybe you want to have a variety of offsets to use on the same tool for any number of reasons, but I’m betting this is your issue.

Good luck!
 

Jeremy Sawatzky

Plastic
Joined
Nov 16, 2021
Yep shorty after posting I was noticed the offset being called was H6 and should have been H8. - any idea why the program would have done this? its scary because this time it happened to be calling a longer offset than what was needed but if it calls a shorter offset by accident I will have a crash. I have re-exported this program probably a dozen times now.

Found it - I must have fat fingered the length offset button when adjusting the tool in my tool library. - Nice to find the smoking gun though now I dont have to worry so much.
 
Last edited:

EMTech

Aluminum
Joined
Feb 10, 2022
Location
South Bend area
I am not familiar with HSMworks, but the software should have seperate fields for the tool number and the height offset number to allow you to control them separately.
 








 
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