@raymonds I have been running the Duet 3 mini 5+ with three different A/B-motor setups now:

LDO-42STH40-2004MAC 0.9 - I could not get these to work without layer shifting with the Duet board. OMC/Stepperonline 17HS19-2004S1 - These are great affordable stepper motors and worked perfectly IMHO. Still got four of them on Z. Ran them at 1200 - 1600 mA LDO-42STH48-2504AC - Had to see what the hype was all about. I run these at 1600 mA and they are OK but quite noisy. Probably for the speed freaks running 48V stepper drivers. As #1 on my list they have the JST connector so I got neater cabling with these than with #2. Nothing wrong with these so far so they'll stay on.

Disclaimer: These are my subjective opinions not based on any calculations and they may work for me but not for anyone else.

I might add that I have two Sanyo high flow 60 mm fans cooling the controller bay which is quite airy. I haven't noticed any temp warnings from the stepper drivers.

Ah yes, depending on how you've started a printer profile in Cura it may include some speed limiting commands for marlin based printers. Best to delete those lines.

@droftarts said in Ender 3 Motors Wiring Sound:

M569 P# D3 V0

Thank you so so so much! It works perfectly now

Thanks you all, adding the timings to the M569 commands as @jay_s_uk and @PCR suggested fixed it!

alright, great, thanks!
(can I mark this as solved?)

@mrehorstdmd thanks Im not going to use plastics nor heated nozzle 🙂

@urban said in Driving micro steppers with DuetWiFi:

OK, thank you!

Hmm, would it work to connect a stepper with similar inductance (4.7mH) in parallel to start with?

Yes.

I was hoping to get away without doing that, but there are some sticks that are made for low voltage, like 5V, that could be used.

A standard stepstick run from 24V should work, as long as you can adjust the pot to get a low enough current.

Can you please expand on why full step mode is better.

Normally, the driver uses chopping to regulate the current in the stepper motor coils. This relies on the stepper motor being predominantly inductive. With the large value series resistors, the load will be more resistive than inductive, so chopping won't work. However, in full step mode it doesn't need to work, all the driver needs to be able to do is turn each phase on or off. You would set the stepper current to a larger value than the drivers can provide via the resistors, so that the chopper wouldn't operate.

The chip on the duetWiFi doesn't have Trinamic StealthChop, but would that mode improve the capability to use micro steppers?

StealthChop doesn't work well at the bottom end of the current range, so again it would be necessary to increase the values of the sense resistors.

@devleon said in Upgrading Steppers for an Ender 3:

JK42HS34-1304

That motor would IMO be just perfect for the Bondtech extruder, unless you want to use a 0.9deg motor. I use it in the Titan extruder on my delta (soon to be replaced by a Bondtech). The problem with using a more powerful motor on a geared extruder is that it helps to have the torque low enough so that if the nozzle is temporarily obstructed, the extruder skips steps instead of grinding the filament. But if you start with a high torque motor and reduce the current to reduce the torque, not only do the microsteps become less even, but the high rotor inertia of the larger motor limits the acceleration.