Mesa 7I76EU TB2 not working right (TB3 works fine) – need help diagnosing

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6 months 3 weeks ago #345418 by tommylight
Can you make a new very simple config and test again?

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6 months 2 weeks ago - 6 months 2 weeks ago #345423 by adhamamer
I tried on a Raspberry Pi 4 with image "image_2026-01-21-raspios-lcnc-2.9.8-trixie-arm64"
and on a Laptop with image "linuxcnc_2.9.8-amd64.hybrid"
and unfortunately i get the same results on both, with the simplest configs i can do, even in the test/tune tab in pnc wizard it acts the same way, Sorry guys i may be missing something really basic here, do you think it might be the firmware?

config name "GG" made on the laptop

Files attached

File Attachment:

File Name: GG.hal
File Size:8 KB

File Attachment:

File Name: GG.ini
File Size:3 KB

File Attachment:

File Name: qtvcp_postgui.hal
File Size:0 KB
Last edit: 6 months 2 weeks ago by adhamamer.

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6 months 2 weeks ago #345424 by PCW
The hal and ini file look sane so I would guess its some kind of hardware issue.
 So the card should be returned for evaluation
 

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6 months 2 weeks ago #345425 by adhamamer
You think it's worth it to give it another shot with flashing another firmware before returning it or do you advice against that?

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6 months 2 weeks ago #345426 by PCW
Unless you changed the firmware, I doubt that that's the issue.
 (all cards are tested and shipped with standard firmware)
The following user(s) said Thank You: adhamamer

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6 months 1 week ago #345824 by adhamamer
Update:

MESA Replied:“OK, examined the cardU15 (STEP+/DIR+ 0..3 driver) and RN31 (27 Ohm resistor networkin series with STEPO+/DIRO+ and STEPO-/DIRO- pins) were both damaged.RN31 had opens on the STEPO+ and DIRO+ pins.Damage was likely caused by connection of theSTEPO+,DIRO+ pinsto either something outside the 0 to +5V range (even briefly) ora long time short of the STEPO+,DIRO+ pins to 5V or ground.”

Im pretty confident that i did not cause this damage, all the wiring Ive done on tb2 was also done on tb3 to a standard tb6600 stepper driver
What do you guys think i should do?

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