What noise level is expected when the printer is inactive?

darookee

My X-Axis stepper hums quite a bit. Here are my settings:

M906 X855 Y855 Z1080 E855 I40  ; Set motor currents (mA)
M350 X16 Y16 Z64 E16 I1              ; set 16x microstepping with interpolation
M92 X80 Y80 Z1600 E98                ; set axis steps/mm

As far as I can tell they are 1.8° steppers, the one that makes the noise has this number on it: 42HS34(L)-0954JA05-D21

CHP

Wantai 42BYGHM809L20P4.5-17-X2
M906 X1275 Y1275 Z800 E1000 I30
Supply: 24V

They are humming noticably compared to the A4988 I used before, but it's not too bad.

jarjar

Same issue here.

Motors are way noisier when idle than my Prusa MK2 with Allegro drivers.
I'm using the same Jugetek 42JT47-1684A steppers and settings as the D300VS:

M906 X1000 Y1000 Z1000 E500 I30		; Set motor currents (mA)

Power supply is also 24V.

dc42

If I ever get time, I'll experiment with different values of the chopper control register in the stepper drivers, to see if we can can reduce the noise that some users seem to experience.

raykholo

David, we ran into this a bit in the Smoothie world, albeit with a much smaller sample size.
I'm not sure which chopper configuration you're using presently, but perhaps the ones noted here can be of help:
https://www.kreativ-fraesen.de/technisches/3d-drucker/stepper-driver-tmc2660/

jarjar

So I experimented with the various chopper settings (TBL, random off time, HEND, HSTRT and tOFF), and I'm afraid to report that this has very little effect on the hum/hiss noise.

Raykholo, the chopper register value suggested on the website has tOFF = 0, which disables the drivers.
No wonder that a disabled driver makes no noise…

So I don't know what to try now. My guess is that the culprits are the stepper motors, though these particular motors are used by all D300VS owners without any tweak to the chopper settings, and I've yet to see a claim they are noisy...

DjDemonD

Mine have been more noisy at idle with later firmwares 1.20 onwards than before but its only barely audible for me, so not really a problem.

jarjar

These steppers/drivers/metal delta frame are driving me crazy.
I finally found out that the steppers are indeed near silent… when not connected to the frame.

As soon as they are bolted to the frame, the noise is amplified a lot.
Using Astrosyn dampers helps. When the steppers are connected to the frame with them, but without belt,
the steppers become silent again. With the belt on, the noise is coupled and amplified by the frame, but less than
without the dampers.

Some numbers for reference (measured about 1m away from the printer):
Ambient noise: 36.2 dBA
Steppers idling (2 with dampers, 1 without): 39 dBA
Homing: 42 dBA

I'm really surprised nobody seems to have the same issue...

number40fan

I have some pretty good ears, but I don't hear anything at idle. I did drop voltages after switching to 24V due to the noise the entire delta made while printing. Currently sitting at 1000mA for a 1.7A stepper and 60% idle.

Still on 1.18, if that makes a difference.

biscuitlad

I've just finished my configuration of a K8400 converted to Duet wifi on 1.20 and the stepper motors make a lot of noise in idle. The machine is silent, then you home all, then there's a noticeable whine, which drops very marginally after 30 secs until I send it M18 just to keep it quiet. Originally the K8400 was much quieter at rest than it is with the Duet, so I think my configuration values might be wrong. I've tried playing around with the idle current value and the M906 motor currents, but the noise is still there. These are the standard nema17 1.8 degree rated at 2.5A.

[[language]]
M350 X16 Y16 Z16 E16:16 I0                         ; Configure microstepping without interpolation
M92 X67.36 Y67.36 Z2560 E148.7:148.7          	; Set steps per mm
;M566 X600 Y600 Z24 E1200:1200                      ; Set maximum instantaneous speed changes (mm/min)
M566 X600 Y600 Z30 E20 				; Maximum jerk speeds mm/minute
M203 X15000 Y15000 Z100 E3600:3600                   ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z15 E1000:1000                   ; Set accelerations (mm/s^2)
M906 X1500 Y1500 Z1500 E1500:1500 I30                   ; Set motor currents (mA) and motor idle factor in per cent
M84 S30

Phaedrux

1500 may be a bit high for the motors? 80% of max as a rule of thumb. But given the motor parameters you can do some calculations to figure out what a good ballpark should be.