G92 messing up the coordinate

KenC wrote:

Hi John,

The same problem persisted in any situation when ever I click on the Z-zeto touch-off the second time when I open up EMC2. & its not G-code file related.

Are you saying that you jog the Z axis down to a point then with the Z axis radio button selected you click on the "Touch Off" button, then select "Tool Table" then click on the "Ok" button? If this is the case then you are adding the current G54 offset to your tool offset. In 2.4 always issue a G59.3 or similar (I used to use G55) to select a coordinate system that does not have any offsets before touching off the tool table or clear any G54 offsets before touching off the tool table.

John

Hi,
I would like to report that my G92 is still messing up my machine co-ordinate...

G92.1 does reset the coordinates, but when I proceed with a new G92 issue, the coordinates mess us again...

Any help is highly appreciated.

Regards

Ken

Are you using tool table offsets? Do you cancel them after use? Do the offsets in the tool table relate to your errors?
Can you try G10 L20 instead of G92 to set the coordinate system?

Rick G

Ken,

Your going to have to give us more information than "it's messing up" to get past your learning curve. Please tell us exactly what your doing, what you expected, and what you got along with a sample of the code that gives you the unexpected result.

John

To put things real simple. I use G92 to assign new coordinate value. Mostly on Z axis.
It will work nicely for the 1st time when I open EMC. & I can run a .ngc happily with it.
& when I wish to assign a new coordinate with G92, the warning bar at the bottom right of AXIS screen will flash "exceed joint's negative limit". without fail.
When I use G92.1, it will reset the DRO coordinate values but still flashes the "exceed joint's limit" warning.
So what I do to continue with work is G0 0,0 & close EMC. Re-open EMC & home all the axis all over again.

Again, I do my homing manually as I don't have limit switches installed.

I tried G10 L20, but I get warning asying "out of range"...

Regards

KEn

Be sure to use P with G10

Such as G10 L20 P1 X0 Y0

Have you looked at your tool table?

Have you made sure all offsets are off such as G49?

linuxcnc.org/docs/html/gcode_main.html#sub:G43,-G49:-Tool

Rick G