to ground

Phaedrux

I'm sorry, but I don't understand your sentences.

You switched the wiring, but did the problem followed the motor or the driver?

What is the exact error message?

Swanny

I switched the wiring from extruder 1 (the problem) to extruder 2 and the wiring from extruder 2 to extreuder one.
By testing both extruders extruder one workt perfect again.
extruder 2 had the problem now.
The error message was the same.
so the problem followed the extrudermotor.
error message: short-to-ground reported by driver(s) 3

dc42

@swanny it sounds as though the motor or the cable is shorted, or the phases are not correct.

Phaedrux

So no matter which motor you have connected to driver 3, you still get the short to ground error for driver 3?

Yet you say the problem followed the extruder motor, not the driver?

Use this to verify your motor phases are wired correctly.

https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors#Section_Identifying_the_stepper_motor_phases

Swanny

@phaedrux
The extruder motor has a connector and has been delivered with ready wiring with connectors installed.
making a mistake is not possible.
and indead always the same error: short to ground error for driver 3

Phaedrux

@swanny said in to ground:

The extruder motor has a connector and has been delivered with ready wiring with connectors installed.
making a mistake is not possible.

If you think that, you'll find troubleshooting very difficult.

There is no standard for how stepper motors are wired even when they come from manufacturer with wires and connectors. Different boards have different pinouts. And believe it or not, mistakes can be made by the manufacturers themselves. The only way to be sure is to measure and identify the phases yourself.

@swanny said in to ground:

so the problem followed the extrudermotor.
error message: short-to-ground reported by driver(s) 3

Did the problem follow the extruder motor, or did it stay on driver 3? Which is it?

Swanny

@phaedrux
The problem did follow the extruder motor. The reported error was the same.
about wiring: it was working perfect for a long period. So the wiring cannot be the problem.

Phaedrux

When and where did you purchase your Duet?

Swanny

@phaedrux
E3D-Online
Unit 35A, Monument Bus Pk
Chalgrove, Oxfordshire
OX44 7RW
United Kingdom

Phaedrux

@swanny Recently?

Swanny

january 2020

droftarts

@swanny said in to ground:

about wiring: it was working perfect for a long period. So the wiring cannot be the problem.

Please don't assume that, particularly on wiring that is moving, ie going to an extruder drive mounted on moving axes. Over time the continual bending of the wire will fatigue and then break it. However, breaks may only happen in particular positions, which causes the fault to be intermittent. Look at points where the wiring is bending on one side, and stationary on the other, often where the wire goes into a crimp. If you've already replaced all the wiring, replace the motor (wiring can come adrift internally).

If the fault follows the motor and wiring, it's not the Duet, it's the motor or wiring. Moving wiring needs to be treated as consumable.

january 2020

Unfortunately out of warranty; warranty period is 1 year. See our warranty terms here: https://www.duet3d.com/warranty

Ian

Swanny

@droftarts

The europian warranty is 2 years.
the wiring and extrudermotor have been replaced.
so the story about shafing and bending is not in place.
The same error (and thats coming from the duet) when switching the extruder motor happend.
the motor stering from extruder one is connected to extruder 2 from the duet. causes motor 2 to fail so saying that it is the motor or motor wiring is false.
If you sell in europe you have to follow the europian rules.

I like to here from you.

droftarts

@swanny okay, reading the thread through carefully it does seem that it’s a driver problem rather than motor; it’s always driver 3 that reports the error. Unfortunately some of your answers confused this, but I think it’s just language!

From your config.g, it looks like you have spare drivers on your Duex. With power off, disconnect extruder drive from driver 3 (E0) and connect to driver 8 (E5) on Duex, then change M584 in config.g to:
M584 X0 Y1 Z2 C7 E8:4:5:6
Reset for changes to take effect. That should get you going again.

Then please take a good, high resolution picture of both sides of the Duet board around the area of the driver, and post them here.

Regarding warranty, the European 2 year warranty is not a full warranty for 2 years. See https://europa.eu/youreurope/citizens/consumers/shopping/guarantees-returns/faq/index_en.htm
Most relevant answer is this one, which explains you are covered for manufacturing faults for 6 months, which we have extended to a year:

I bought a phone just over a year ago, and it has stopped working. The trader refuses to fix it for free. Do I have a two-year legal guarantee?

The legal guarantee is valid for a period of two years throughout the EU. But there are certain conditions.

The legal guarantee covers any defects presumed to have existed at the time of delivery and which become apparent within a period of two years. However, the crucial period is the 6 months after you bought your product:

Any fault that appears within 6 months will be presumed to have existed at the time of delivery. The seller must then repair or replace your phone free of charge, or reimburse you if repair or replacement is impossible.
After 6 months, you can still hold the seller responsible for any defects up to the end of the two-year guarantee period. However, the seller can ask you to prove that the defect existed when your goods were delivered. This is often difficult, and you will may have to involve a technical expert.

I assume that you have been using the Duet without problems for over a year?

Ian