WCS Problem with Linuxcnc/qtdragon

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14 Oct 2025 08:46 #336414 by Bram kersten
WCS Problem with Linuxcnc/qtdragon was created by Bram kersten
I have avidcnc from 2017 from wich i recently replace the breakoutboard with a mesa7i76EU to make it work with linuxcnc.
Everything seems to be working fine,

The only problem i have is that it doesn't seem to use the WCS coordonates after i zero my machine But keeps using only the absolute coordinates when im running my gcode
This causes the machine(zaxis) to move into the bed when starting the program.

can somebody help me please.
Thanks in advance.i added my gcodeand my hall/ini files for qtdragon.  

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14 Oct 2025 21:49 - 14 Oct 2025 22:31 #336452 by langdons
Replied by langdons on topic WCS Problem with Linuxcnc/qtdragon
Why did you replace the original breakout board?

LinuxCNC can work with a lot of different hardware.

The bottom of the window seems to be cut off (the monitor is slightly too small perhaps), is it possible that there is some important information that we (most importantly, you) can't see?
Last edit: 14 Oct 2025 22:31 by langdons. Reason: Fixed punctuation.

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15 Oct 2025 11:02 #336492 by Bram kersten
Replied by Bram kersten on topic WCS Problem with Linuxcnc/qtdragon
Because we had problems with mach4 and our hardware wasn't compatible with linuxcnc. 

and oops i see i frogot to f11 in my picture but there isn't that much more info only the status bar. but maybe you can see someting extra, im very new to linuxcnc/qtdragon so to me everything looks normal.

i added a picture with the fullcreen gui
Attachments:

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15 Oct 2025 11:12 #336493 by cmorley
Replied by cmorley on topic WCS Problem with Linuxcnc/qtdragon
Does t3 have x or y offsets in the tool page?

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15 Oct 2025 22:15 #336519 by langdons
Replied by langdons on topic WCS Problem with Linuxcnc/qtdragon
STATUS appears...blank.

Weird.

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17 Oct 2025 12:40 #336592 by Bram kersten
Replied by Bram kersten on topic WCS Problem with Linuxcnc/qtdragon
no it does not have any offsets

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17 Oct 2025 12:41 #336593 by Bram kersten
Replied by Bram kersten on topic WCS Problem with Linuxcnc/qtdragon
it also moves down before the spindle even powers up. my g54 wcs is activated and i removed tool offsets. i also removed all probing actions. i'm so lost

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17 Oct 2025 14:55 #336600 by MaHa
Replied by MaHa on topic WCS Problem with Linuxcnc/qtdragon
Your Z configuration seems to have zero at the bottom, normally not recommended.
I would change Z machine home to top, something like


[AXIS_Z]
MIN_LIMIT = -350
MAX_LIMIT = 0.001
HOME = 0.0

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17 Oct 2025 15:08 #336601 by Bram kersten
Replied by Bram kersten on topic WCS Problem with Linuxcnc/qtdragon
correct, i'm gonna change that, it's the safer option. sadly this isn't a fix for the problem.

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17 Oct 2025 16:12 - 19 Oct 2025 21:13 #336609 by langdons
Replied by langdons on topic WCS Problem with LinuxCNC/QtDragon
Agreed.

Home belongs on the top for the Z axis.

Remember that all you need is 1 home swich per axis, limit switches are more of an extra safety thing.
Last edit: 19 Oct 2025 21:13 by langdons. Reason: Fixed typo

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