Centroid Community CNC Support Forum

Hey folks,

I am going in to set tool height and using my KP-3 probe. I am getting this error...please advise.

Operation cannot be performed. Z zxis of reference point #1 (G28) is set too low.

Pls. post a report

This error could be a wrong setup or wrong setting in G28 return point.

Uwe

That message is usually shown only in response to your pressing the Tool Check key.

Are you telling us that it is appearing before, or during, either auto measurement of the height offset; or auto setting of the Z Reference height for tool measurement? And not in response to your pressing the Tool Check key?

In any case, Uwe is correct: it relates to the Z coordinate you have set in Return Point #1 (G28). See F1/Setup -> F1/Part -> F9/WCS -> F1/Return.

No one here can help you further with that question, until you post a Report so we can see what values you have in Return Point #1.

cncsnw wrote: ↑Tue Jul 29, 2025 1:24 am That message is usually shown only in response to your pressing the Tool Check key.

Are you telling us that it is appearing before, or during, either auto measurement of the height offset; or auto setting of the Z Reference height for tool measurement? And not in response to your pressing the Tool Check key?

In any case, Uwe is correct: it relates to the Z coordinate you have set in Return Point #1 (G28). See F1/Setup -> F1/Part -> F9/WCS -> F1/Return.

No one here can help you further with that question, until you post a Report so we can see what values you have in Return Point #1.

Yes. How do I go about solving the issue?

Read the manual

2nd best post a report to give us sufficient information to help you.

Uwe

cdiseker wrote: ↑Tue Aug 05, 2025 2:04 pm

cncsnw wrote: ↑Tue Jul 29, 2025 1:24 am That message is usually shown only in response to your pressing the Tool Check key.

Are you telling us that it is appearing before, or during, either auto measurement of the height offset; or auto setting of the Z Reference height for tool measurement? And not in response to your pressing the Tool Check key?

In any case, Uwe is correct: it relates to the Z coordinate you have set in Return Point #1 (G28). See F1/Setup -> F1/Part -> F9/WCS -> F1/Return.

No one here can help you further with that question, until you post a Report so we can see what values you have in Return Point #1.

Yes. How do I go about solving the issue?

post a fresh report.zip for starters so we can see your setup numbers.
we need a lot more info to help you.

Thanks everyone. I ended up re-booting and it all works again.

Continuing with my tool library...I've tried for several days now after reading the user manual and the updated process for using my KP-3 probe to set Z value and set my tool height offsets. Still, the tool heights are wrong.
When I hit cycle start the end mill chgosen drops down and then starts to do its job. Only problem is it is about 1.5 inches too high.

Seems like I remember seeing a video on how to enter and set up tool offsets. Does anyone know where this video is or can offer help?

got a photo library of your machine you can share?
where is Z home?
are you using the Probe as a reference tool or Z home position as the reference position?
you are also running an old version of cnc12 (5.08), while this is not the issue, it would be nice to be running the latest version of CNC12 which has 100's of improvements over the version you are running. and its easier for us to provide support on the current released version of CNC12 rather than trying to remember what some old version was like, what bugs it had, what those work arounds are. etc..
the software and new features are free, you just have to take the time to do a fresh install and reconfigure (there are improvements in the Probe setup menu and the TT menu which may help you)


so i suggest you use the latest version so we can help you out. to do this.

open v5.08 Wizard and make Wizard screen shots with the windows snipping tool.
open v5.08 util menu create report.zip , save to thumb drive.
make a copy of the cncm directory, save out to a thumb drive or another computer for safe keeping

and download and install CNC12 Router v5.30,
download v5.30 cnc12
https://www.centroidcnc.com/centroid_di ... loads.html
Open the Wizard and configure the machine with the data collected in the wizard screen shots in step one. press write settings to cnc control and follow the instructions.


copy over g code programs and wcs and tool library (if you want them) from the v5.08 cnc directory to the new v5.30 directory, otherwise just start fresh and start using the default. if you have custom VCP and/or macros, copy that over as well.