I updated to 1.21, and saw a message that the G3 was outside limits.
After updating the printable radius all is good. Sorry for the noise.

I'm using 1.19.2.
I didn't bother upgrading since I did not see any bug fixes related to G3 moves in the recent releases.

Hello,

On my delta, with a 300mm round bed, I'm trying to print a priming line before starting the actual print with the following gcode:

G90 ; absolute positioning
G0 X-49 Y-139 Z0.2 F12000
; Arc Prime Line
G3 X10 Y-147 I49 J139 E9 F1000
G3 X49 Y-139 I-10 J147 E12.5 F1000

When I input this gcode manually in the web console, it works fine.
When trying to print a file, the first G3 move makes the printer go up diagonally?!

For reference, this is the whole gcode header in the test print file:

; generated by Slic3r 1.37.2-prusa3d on 2018-06-15 at 20:50:46

; 

; external perimeters extrusion width = 0.45mm
; perimeters extrusion width = 0.45mm
; infill extrusion width = 0.50mm
; solid infill extrusion width = 0.45mm
; top infill extrusion width = 0.40mm
; first layer extrusion width = 0.42mm

M107
M83 ; extruder relative mode
M104 S160 ; warm extruder to calib. temp
M140 S75 ; set bed temp
M190 S75 ; wait for bed temp
M109 R160 ; wait for extruder temp
G32 ; auto calibrate
G90 ; absolute positioning
G1 X-49 Y-139 Z0.2 F12000 ; go to ooze position
M109 S215 ; wait for extruder temp
; Arc Prime Line
G3 X10 Y-147 I49 J139 E9 F1000
G3 X49 Y-139 I-10 J147 E10 F1000


G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
;BEFORE_LAYER_CHANGE
;0.2

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...

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...

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.