Setting work offsets with pendant

Hi,
Not sure where this question should go, sorry if i'm in the wrong section.

I'm setting up a 3 axis CNC machine and have found a problem that I havn't been able to solve.

I have a pendant that is connected through the modbus. I am writing a component to parse all of the data coming from the pendant (which buttons are pressed, jog wheel position etc.) and interact with emc2 via halui.

I want to be able to set the work offsets g54-g59.3 by pushing a button on the pendant. What I would like to happen is I select the work offset I want to set using pyvcp buttons on the axis gui, and then when I push the button on the pendant it sets the offset of whatever axis is selected to the current position.

eg. if my machine position is x3 y4 z5, and I have g54 and the x axis selected, when I push the button sends the equivilent of the mdi command G10 L2 P1 X3.

My appologies if this question has already been answered somewhere, but I could not find it.

Thannks for your time.

-Evan

You can use a button to issue a MDI command with Hal. An example can be found here...

wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Add...imple_Remote_Pendant

Rick G

currently there is no way to tell G10 L20 to use the current coordinate system - you must specify it.
(you want to use L20 it sets the axis to the number you supply - if you want X to b 0 set G10 L20 P[something] X0 )
This is being looked at in the development version.
there may be a hack to work around it for now....
hmm I can't find anyway for HAL to know what coordinate system is active.
so I can't think of a work around.

So the only thing you can do is to have your button always assume one particular coordinate system.
This is what Andy is doing one message below.
the problem is if you are not in that coordinate system the offsets will be applied to the wrong system.
i guess it depends on if you use more then one system regularly.

This same issue has come up with someone using a touch off plate.

Chris M

to answer your other question about setting coordinate via pyvcp panels:
use the halui mdi commands to
issue g 54 -59.3 commands based on which pyvcp component was pressed

Thanks for the help guys, I'm just retarded, I was unaware of the g10 l20 code, I thought you had to use g10 l2 and specify the offset.

As for picking the work offset, I'll just create a set of buttons on the axis ui so I can choose which offset to set. That way I can pick it, then walk over to my workpeice and set all the coordinates. Edit: what cmorley said.

Sorry about the dumb question, haha.