A few issues with the qtdragon (Linuxcnc 2.9)

    def rotate_coord_system(self, a=0.):
        self.status_a = a
        if self.allow_auto_skew is True:
            s = "G10 L2 P0"
            if self.allow_auto_zero is True:
                s += " X{}".format(self.data_adj_x)
                s += " Y{}".format(self.data_adj_y)
            else:
                STATUS.stat.poll()
                x = STATUS.stat.position[0]
                y = STATUS.stat.position[1]
                s += " X{}".format(x)      
                s += " Y{}".format(y)      
            s +=  " R{}".format(a)
            self.CALL_MDI_WAIT(s, 30)
            ACTION.RELOAD_DISPLAY()

Basic probe is used to semi-automatically probe workpieces to find edges, centers
and angles.
The combo box allows selecting the basic type of probing buttons shown:

* Outside Corners
* Inside Corners
* Edge Angles
* Boss and Pockets
* Ridge and Valleys
* Calibration

You must carefully set the 'Probing Parameters':

* 'Probe Tool': will only allow probing if this tool number is in the spindle
* 'Probe Diameter': the size of the probe tip
* 'Probe Rapid': the speed of rapid moves in machine units
* 'Probe Search': the speed of the first 'rough' search in machine units
* 'Probe Feed': the speed of the second 'fine' search in machine units
* 'Extra Depth': Lowers the probe further by this much
* 'Step Off': back off and reprobe distance
* 'Max XY Distance': the maximum distance the probe will search for in X and Y
* 'Max Z Distance':  the maximum distance the probe will search for in Z
* 'XY Clearance': move away distance from probed point before rapid traversing in X and Y
* 'Z Clearance': move away distance from probed point before rapid traversing in Z
* 'Edge Width': approximate distance the probe start position is from edge

There are also hint parameters depending on selected probing type:

* 'Diameter Hint': used by Round Boss or Round Pocket probing (moves 1/2 diameter plus XY clearance)
* 'X Hint': used by Rectangular Boss/Pocket probing (moves 1/2 X length plus XY clearance)
* 'Y Hint': used by Rectangular Boss/Pocket probing (moves 1/2 Y length plus XY clearance)

After setting the parameters, manually move the probe to the approximate position
represented by the purple circle on the button.
Confirm the parameters are reasonable then press the desired probing button.
The probing routine will start immediately.