2 motors for the same axis

Hello,
When I launch Linux Cnc, on axis, I don't have X, Y, Z, but 0, 1, 2. I guess this is normal.
I can request an origin on all axis :

• First Z, this is OK
• Second X and X(A) : this is OK. Two axis stop on their own switch limit
• Third, Y, this is OK

Then, when it finish, I switch using $. Now 0, 1, 2 are replaced by X, Y, ... and an error appeare. The exact message is "Erreur de suivi jointure 0". In english, the approximative translation is "error of following joint 0".

Thanks

at least you managed to switch from world mode ,
look in your ini for the follow error values per axis and increase the min follow error to say 0.5

Can you go into Machine->Show HAL config and check the Signals
xpos-cmd, xpos-fb
apos-cmd, apos-fb?

Looking here:

linuxcnc.org/docs/html/man/man9/gantrykins.9.html

I wonder what this means, in practice?

In the inverse kinematics, each joint gets the value of its corresponding axis. In the forward kinematics, each axis gets the value of the highest numbered corresponding joint. For example, with coordinates=XYYZ the Y axis position comes from joint 2, not joint 1.

andypugh wrote: I wonder what this means, in practice?

This sort-of makes sense. There are two X-feedbacks from two (different) stepgens and only one can be compared to the internal X value.

Try short-circuiting the axis.0 feedback, like this: (ie comment out the stepgen and send the command back as feedback)

Hi,

I have a similar problem with axis definition.
I was able to configure a tandem axis (X or Y) in "world-mode".
Now when I define a "tandem-axis" the system sets directly the "joint-mode" and I cannot set it back to world-mode with view-panel.

does anybody know about some wrong settings somewhere ?