Touch plate error

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19 Jun 2021 06:13 - 19 Jun 2021 06:49 #212387 by Myscion
Replied by Myscion on topic Touch plate error
I'm battling this right now too, good to see I'm not going crazzy! The strange thing is the Vesa Probe widget works great! This is with QTDragon_HD on the master branch.

I've narrowed it down to these two lines in the touchoff function around line 905.

command = "G1 Z10 F{}".format(search_vel)
ACTION.CALL_MDI_WAIT(command)


If I comment this out no error. If I hard code the speed it works great:

command = "G1 Z10 F20"
ACTION.CALL_MDI_WAIT(command)


I would recommend anyone simply edit the file and hardcode it until someone figures it out.

The strange thing is the search_vel parameter is used earlier on in the same function with no errors!?

A separate tangential complaint is that the function is hardcoded to be metric and leaves the machine in metric. Not a big issue, I can tell a ton of work has gone into getting the GUI to a state where it works with both units of measurement and I haven't run into this anywhere else. I just had to remove the G21 at the start of the function.
Last edit: 19 Jun 2021 06:49 by Myscion.

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19 Jun 2021 17:18 - 19 Jun 2021 17:23 #212426 by Myscion
Replied by Myscion on topic Touch plate error
I slept on the problem and determined there must be a problem with the

.format(search_vel)

function inserting bad characters into the command. I then added a print to check the output.

print("Touch Off Command: " + command)

Oddly though the printed command looked fine despite the error I was still getting. I attached the console output as an image.

Running out of things to try I hardcoded the feed rate of 10.0 that I set as search velocity and still an error. Okay, maybe it doesn't like the decimal point.

command = "G1 Z1.5 F10"
command = "G1 Z1.5 F15"

Still get an error.

command = "G1 Z1.5 F20"
command = "G1 Z1.5 F21"
command = "G1 Z1.5 F30"

These commands worked without any errors. A feed rate of 15 did get the "parameter file not found" error.
The 2nd to the last ACTION.CALL_MDI in the touchoff function does not like the '1' digit in the feed rate.

Very strange this makes no sense. Wonder if my machine is corrupted or something. The Vesa probe routines all work fine.

Mathew, what value do you have set for search velocity in settings? If you use the same search velocities I tried do your results match mine?
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Last edit: 19 Jun 2021 17:23 by Myscion.

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20 Jun 2021 00:39 #212455 by cmorley
Replied by cmorley on topic Touch plate error
if the command takes lmore then 5 seconds to finish - that will cause an error... not sure why it would be the parameter missing error though.

Does that sound like it might be the problem?

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22 Jun 2021 00:00 #212619 by mb_cnc
Replied by mb_cnc on topic Touch plate error
Myscion, I tried hard coding the search velocity with various values and the error message always displays. When displaying the code in message windows it all appears correct. Interestingly the routine has been updating the offset table and positioning the machine correctly so really it's mostly just an annoyance. So if the function is working correctly then what? Maybe it's not exiting the function clean and throwing the error? Not sure.

thanks

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22 Jun 2021 00:05 #212621 by mb_cnc
Replied by mb_cnc on topic Touch plate error
Cmorley, I tried speeding up the search and home velocities to test but still the same error message. Good idea to test.

thanks

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25 Jun 2021 04:50 #212872 by cmorley
Replied by cmorley on topic Touch plate error

I'm battling this right now too, good to see I'm not going crazzy! The strange thing is the Vesa Probe widget works great! This is with QTDragon_HD on the master branch.

.


So I am looking at master, around line 905 and it is different from what you quoted.
So either your master branch is old or you are not using linuxcnc's version or you modified something.
Can you paste the code snip it
Chris

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27 Jun 2021 17:44 #213040 by mb_cnc
Replied by mb_cnc on topic Touch plate error
Here is the code, it is from qtdragon_handler.py. master unmodified.

thanks

    def touchoff(self, selector):
        if selector == 'touchplate':
            z_offset = float(self.w.lineEdit_touch_height.text())
        elif selector == 'sensor':
            z_offset = float(self.w.lineEdit_sensor_height.text()) - float(self.w.lineEdit_work_height.text())
        else:
            self.add_status("Unknown touchoff routine specified")
            return
        self.add_status("Touchoff to {} started".format(selector))
        max_probe = self.w.lineEdit_max_probe.text()
        search_vel = self.w.lineEdit_search_vel.text()
        probe_vel = self.w.lineEdit_probe_vel.text()
        ACTION.CALL_MDI("G21 G49")
        ACTION.CALL_MDI("G10 L20 P0 Z0")
        ACTION.CALL_MDI("G91")
        command = "G38.2 Z-{} F{}".format(max_probe, search_vel)
        if ACTION.CALL_MDI_WAIT(command, 10) == -1:
            ACTION.CALL_MDI("G90")
            return
        if ACTION.CALL_MDI_WAIT("G1 Z4.0"):
            ACTION.CALL_MDI("G90")
            return
        ACTION.CALL_MDI("G4 P0.5")
        command = "G38.2 Z-4.4 F{}".format(probe_vel)
        if ACTION.CALL_MDI_WAIT(command, 10) == -1:
            ACTION.CALL_MDI("G90")
            return
        command = "G10 L20 P0 Z{}".format(z_offset)
        ACTION.CALL_MDI_WAIT(command)
        command = "G1 Z10 F{}".format(search_vel)
        ACTION.CALL_MDI_WAIT(command)
        ACTION.CALL_MDI("G90")

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