Smoked y driver on Duet 2 wifi after swapping out a motor.

Redheadrambo

So I was having trouble with y-axis losing steps here and there so I upped the current to 900mA. Worked for a while but I decided to replace the motor with a slightly larger nema 17 that I had laying around. The new motor just vibrated so I figured I had the wires in the wrong order(they were). Fixed them and it still did the same thing and there was a grounding error on screen. Next I put a motor I know was good on the y driver. Smoke. Panic. Kill power.

Now what do I do?

Did you swap the order with power applied?

In any case https://duet3d.dozuki.com/Wiki/What_to_do_if_your_Duet_won't_respond should be your best bet to diagnose wihtout further damage (if possible)

Redheadrambo

Nope. Turned of power before pulling wires.

Goodie, you should be able to safely work though the steps in wiki that states to do so wihtout Vin.

Have you got a multimeter on hand?

Redheadrambo

yes I do

dc42

Unfortunately, connecting a motor with the wires in wrong order does blow the driver sometimes. The reason is that the driver thinks it is applying a certain voltage to each phase, but in reality the voltages being applied are completely different. This results in very high peak currents. The short-circuit protection built into the driver, which RRF configures to maximum sensitivity, doesn't always kick in fast enough to protect the driver.

Redheadrambo

@dc42 Damn. Can I use the E1 driver for the y-axis then?

yeah, wiki should get you going with the config
https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping

droftarts

@Redheadrambo said in Smoked y driver on Duet 2 wifi after swapping out a motor.:

@dc42 Damn. Can I use the E1 driver for the y-axis then?

Yes. Set motor driver direction for E1 with M569 (copy from existing Y motor), then change M584 to use E1 on Y. eg if you had this before:

; Drives
M569 P0 S1                                         ; physical drive 0 goes forwards (X)
M569 P1 S0                                         ; physical drive 1 goes backwards (Y)
M569 P2 S1                                         ; physical drive 2 goes forwards (Z)
M569 P3 S1                                         ; physical drive 3 goes forwards (E0)
M584 X0 Y1 Z2 E3                                 ; Set drive mapping

Change to

; Drives
M569 P0 S1                                         ; physical drive 0 goes forwards (X)
;M569 P1 S0                                         ; physical drive 1 goes backwards (Y) BROKEN!
M569 P2 S1                                         ; physical drive 2 goes forwards (Z)
M569 P3 S1                                         ; physical drive 3 goes forwards (E0)
M569 P4 S0                                         ; physical drive 4 goes backwards (E1, now Y)
M584 X0 Y4 Z2 E3                                 ; Set drive mapping

Ian

Redheadrambo

@droftarts Hey thanks a bunch I'll swap it over when I get home and be WAY more careful with this one.