How to use the TLO function with a tool probe? about bcnc

[chamnit]

Right now you have to do it manually. Record the probe location. When there is a tool change, do another probe and record the new probe location. Then, send Grbl the tool offset between the two probes with a G43.1 command.

[onekk]

Thanks, I have found this post (it's your post)

• Insert your first tool.
• Move to a fixed probing location to determine the z-location of the tool tip. People often use G38 and G30 commands to move there, and usually use a touch-plate of some kind to touch off the tip of the tool.

What is the command to issue the probing, G38.1 ?

• Run the job until a tool change.
• Insert the next tool.
• Move back to the probing location (via G28 or G30) and determine the z-location of the tip of the new tool.
• Calculate the z-position difference between the first tool and this tool.
• Send Grbl a G43.1 command with that difference.
• Run the next part of the job until the next tool change.
• Rinse, repeat, and always calculate the z-position difference based on the first tool location.

Carlo

[chamnit]

See link for probing g-code commands supported by Grbl.