After 4 months my Artisan 246VA stopped working. Any suggestions are welcome.

[kgg]

16 hours ago, Piko said:

I cannot reset to factory because it goes straight to Er 4 and does not let me do anything.

Have you tried unpluging the servo motor cord from the wall outlet. Some electronic items even through you have the power switch in the "OFF" position they are still drawing power and are basically in a "Sleep Mode". I would unplug and wait a few minutes just to make sure it has fully powered down and cleared it's memory. On my LS-341 clone which has a brushless servo motor and electronic control when I throw the power switch to the "OFF" position the electronic display stays light for about a minute before going blank. So there is a power draw. 

19 hours ago, Piko said:

Should I expect this to be replaced under warranty? I am not even sure what the warranty is on this machine.

I would contact both the store and Artisan to clarify your warranty. 

18 hours ago, Piko said:

On a side note, i did damage the cable that goes from the unit to the pedal, it took off some insulation. I’ll check it. I hope tat’s the problem. And I’ll open the pedal too.

Having a damaged cable could have or is causing a short which in turn could have caused an error or worst case fried the controller. If you damaged the wiring chances are you are going to be on the hook for a new cable and possibly a controller. If it does turn out to be the controller unit it maybe cheaper just to replace the complete motor setup for about $150 to $200 for 6 coil motor or $300 for a 12 coil motor or a brushed servo motor for about $175.

The trouble you are having tracing the source of the problem highlights the difference between a brushed servo motor with no fancy electronics and a brushless servo motor with a electronic controller box. 

As you can tell I am not a fan of the brushless servo motors. I like my machines to be as simple as possible. Sewing machine, speed reducer (on some), servo motor, drive belt(s) and a go pedal. The two machines with brushless servo motors have the needle positioning disconnected.

kgg

[dikman]

Did the problem start straight after you damaged the cable? It's a bit of a coincidence if that's not the cause. IF that's the cause then the chances of getting a warranty claim is unlikely. As far as the manufacturers are concerned these things come under the category of "disposable/non-repairable", I've never heard of anyone carrying spare circuit boards for them. Much like the speed control boards in mini lathes, mine died pretty early and the Chinese company offered me a partial refund as they didn't carry spares. I eventually sourced a speed controller on ebay and adapted it BUT I doubt you could do that with a servo.

I agree with kgg, if the board is damaged then the simplest/cheapest option is to buy a generic servo off ebay unless the dealer is willing to help out. As Al said no-one appears to have bothered doing any work on these (probably because there's zero information available about them!).