Got stuck with TLO and Z height

[Team-Deepflights]

Hi,

I hope someone can help me with my problem:

I have a fixed tool length sensor on the workbench. It has a measured height of 34.12 mm.
It's also set to this height in IOsender.

When I perform a home operation, I then use a tool to set the tool reference offset by moving the tool onto the tool length sensor.
When I check the changed tool length on the workbench, everything is fine.

I have a 3D probe with a total length of 47.16 mm, and this probe is also configured with this length in IOsender.

When I use a vise for milling, my Z-axis zero point is naturally higher.
So I position the probe above the workpiece and probe the workpiece.
If I then perform an automatic tool change, the Z-value theoretically ends up back on the workbench instead of on the raised workpiece.

I've already tried setting the probe to 0 mm without success. I've tried both specifying the Z-value and using the difference between the two probes, but I end up with a Z-value that's nowhere near the top of the workpiece.

Tell me, where on earth am I going wrong? The YouTube videos show how to determine a tool length difference, but after that, I can't find anything about zeroing the Z-height with a probe.

I'm probably so completely oblivious that I can't figure it out.

Thanks for helping me out of this mental escaperoom :)

[Team-Deepflights]

Forgot to mention that if I set the probe to a lengthof 0mm, the touch set the Z-height to zero correctly.
If I do now a toolchange, this value is lost.
In the gcode the toolchange is written as TxxM6 btw.

[terjeio]

If you know the length of the tool used to set the reference you could use the difference between that and the length of the 3D probe as the Touch plate parameter and then use the Edge finder, external to probe Z and set the offset.
I believe some even probe the toolsetter with the 3D probe to set the reference, but I do not think that is a good idea.

Tool lengths could be calculated if the length of the spindle relative to the home position is known, I do not know if that could be an item to add to the app settings and somehow use in the probing tab...

[Team-Deepflights]

Thx Terjeio.
I thought it works different. I set the reference offset with an random tool, probe the z-height and measure the offset between the old and the new tool.
But then I am back at the bottom again.
I have kind of tool for the lathe to set the tool offsets in the library, the length is known, so I give it a try tomorrow.

[Team-Deepflights]

Hi,

The way you showed me did it! Thank you.

I am working on a component that has to be machined twice at a 90° angle. When I turned the component in the vice and recalibrated it, the z-height was too low, even homing and a new measurement with the reference tool did not help.
But maibe I did something wrong, I was interrupted several times by the phone, so let me give it a new try in the next days.

Instead of measuring with a reference tool, it would it be easier indeed to set the reference by pressing the tool length sensor with any tool and calculate the height from the upper z-position.
Maibe an idea for a further update.

As I touched off so many times, I thoght it would be more safe to activate the sensor test in the IOsender. Works, but if I call up a TxM6 directly, the machine do what it should do, but without the pop up message to press the sensor to be sure it’s active. I think it would be better to have the possibility to check this before any automated tool change.

As commented, I’ll do more tests and reply again.

[terjeio]

The popup message is part of the probing code running in the sender, any probing during M6 happens in the controller so pausing for a probe verification is not easy to add - if to be added the controller has to be informed by the sender that it is able to handle it.

[Team-Deepflights]

I understand, so it’s not a bug ;-)