Mazak QT20 Automatic tool changer

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19 Mar 2023 11:50 #267082 by andypugh

When I run M06 T08 the turret just keeps turning and never find T08 .
 


I think I can guess the problem. What bit-pattern is T8? I suspect that it is seen as zero and rejected.
If it is all-false can you confirm that that pattern is only seen at T8 and not in-between positions?
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20 Mar 2023 12:58 #267145 by dctrytsman
You are right ,The bit pattern for T8 is all zeros. The bit pattern does not change in between positions ,it goes directly from one to another .How can I get it to work with all zeros ?

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20 Mar 2023 14:30 #267151 by andypugh
A proper fix for the general case would be to have a settable flag to define zero = 2^(sense pins)
But, in your case, you could add a line to the carousel.comp file and re-compile it just for your system.

if you open a command line and type "halcompile -h" do you get an error or a help page? If it is "command not found" then you may need to install the "linuxcnc-dev" package.
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22 Mar 2023 06:51 #267277 by dctrytsman
I get a help page when I enter that .

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22 Mar 2023 09:50 #267286 by andypugh
OK, that means that you can compile HAL components.

If you download this file:
raw.githubusercontent.com/LinuxCNC/linux...onents/carousel.comp

Then open it in a text editor (such as Geany) and change line 202-204 from
for(mask = new_pos >> 1 ; mask != 0 ; mask = mask >> 1){
            new_pos ^= mask;
        }
        break;

to
for(mask = new_pos >> 1 ; mask != 0 ; mask = mask >> 1){
            new_pos ^= mask;
        }
        if (new_pos == 0) new_pos = 8;
        break;

Then save the file and use the command
sudo halcompile --install carousel.comp
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22 Mar 2023 11:55 #267299 by dctrytsman
Thanks ,everything is working now .

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22 Mar 2023 13:24 #267305 by andypugh
Great. That fix is rather specific to your 8-pocket changer, so I have created this issue to track a more generic fix:
github.com/LinuxCNC/linuxcnc/issues/2404
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