Duet 3 warranty process - Error: Short-to-ground on drivers 0

[kdsands88]

"I have had shorts on the wire harness on all drives" - means I got another error stated something like "one of the poles of the motor is not connected"

Again, I root caused the errors to poor wire harness connectors/connections/solder.

Once I fixed the connection issues, all the driver worked except driver 0.

[T3P3Tony]

what error is now reported by driver 0?

[kdsands88]

Note: the stepper motor will rotate.

Below is the screen shot showing the error - Error: Short-to-ground on drivers 0

[T3P3Tony]

So the motor rotates fine, just reports the short to ground on driver 0?

Can you try the motor on a different driver?

[Kiwi3D]

@T3P3Tony

My experience with this issue ALWAY ends up with a terminal connection issue. I'd suggest making sure all 4 pins are crimped correct and fir inside the MOLEX housing

Or.....an issue with the a1 a2 - b1 b2 pairs - I had this with a recent batch of motors that were wired wrong

I had to wire red-green / blue-black

Hope these ideas help

Cheers

Ray

[dc42]

Which version Duet 3 main board is it? On v1.0 and v1.1 boards, a missing, misplaced or badly soldered diode could cause a spurious S2G error. Can you post a hi-res photo of the area of the Duet around that driver?

[kdsands88]

Question: So the motor rotates fine, just reports the short to ground on driver 0?
Answer: Correct. The motor rotates fine, just reports the short to ground on driver 0.

Question: Can you try the motor on a different driver? (And, making sure all 4 pins are crimped correct and fir inside the MOLEX housing.)
Answer: The motor is a test motor I used to root cause the issues with the other drivers. So yes, the motor works on all other drivers with no issue.

Question: Which version Duet 3 main board is it?
Answer:
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.1.1 running on Duet 3 MB6HC v1.01 or later (SBC mode)
Board ID: 08DJM-956L2-G43S8-6J9D2-3S46L-1U2YD

Pictures:
Test motor setup:

Board:

Drivers:

Driver 0:

[A Former User]

Does the error persist when the motor is disconnected?

[kdsands88]

Question: Does the error persist when the motor is disconnected?
Answer: Yes.

Please see above picture.

Please confirm you see the C38 and C36 resistors are cracked.

Is this the issue?

[A Former User]

@kdsands88 said in Duet 3 warranty process - Error: Short-to-ground on drivers 0:

Please confirm you see the C38 and C36 resistors are cracked.

good call highlighting that, I took it to be the same fibers as scattered around the board. they can crack due to thermal stesses, but think we'll leave the judgement to dc42 and/or t3p3tony

[kdsands88]

Sorry, bad quality picture.

New picture does not show cracks:

[kdsands88]

Please confirm you will honor your warranty?

[A Former User]

You have read https://www.duet3d.com/warranty and the section about incorrect wiring?

To me it sounds like you should be singing your praises that having shorts in the wiring harness only damaged one driver instead of making demands; or at the very least pick another approach to elicit some goodwill.

[kdsands88]

bearer are you speaking for Duet 3D?

I work for Ford Motor Company, and I understand my rights as a customer.

Please stop speaking down to me.

[A Former User]

@kdsands88 said in Duet 3 warranty process - Error: Short-to-ground on drivers 0:

bearer are you speaking for Duet 3D?

in no way what so ever.

I understand my rights as a customer.

see the above.

[kdsands88]

Speaking to Duet 3D: Does bearer speak legally for Duet 3D? If not, please block bearer from posting on my official warranty claim.
I am seeking warranty advice from Duet 3D only.
Thanks,

[T3P3Tony]

@kdsands88 we have a lot of helpful users on this forum (especially @bearer ), please respect the friendly environment we are trying to engender here.

It looks like the initial miswiring has damaged Driver 0 so it still works, but reports the error. Normally that would not qualify as a warranty return, however in this case we will make an exception so we can get the board back and look at the damage.

Please upload your config.g file to this thread so we can see the current used etc.

Separately the way the board is mounted in your test setup concerns me. the brass nuts look large enough to overlap the edge of the keepout area around the mounting holes and could wear through the solder resist on the board over repeated fitting. Its not possible to see if you are using the supplied nylon washers to insulate the standoff and nuts from the board but i would recommend using a different mounting solution with female standoffs and small head M4 socket cap screws. See: https://duet3d.dozuki.com/Wiki/Mounting_and_cooling_the_board?#Section_Mounting