Control of stepper motor

JeanC

Hello, I use a stepper to rotate a turntable and I would like to control his rotation with degrees. Currently, I have only found a value in X to enter to make a 360° rotation (G1 X33 F1000). But this is not at all optimal, do you know a command or a way to perfectly control the rotation of the stepper motor shaft in degrees?

;config.g
;drives
M569 P0 S1 R0                               ; set direction of movement and polarity
M584 X0                                     ; set drive mapping
M350 X16                                    ; set microstepping mode for x axis
M92 X80                                     ; set steps per mm
M566 X900                                   ; set maximum instantaneous speed changes (mm/min)
M203 X1000                                  ; set maximum speeds (mm/min)
M201 X500                                   ; set accelerations (mm/s^2)
M906 X800 I10                               ; set motor currents (mA) and motor idle factor in per cent
M84 S5                                      ; set idle timeout
M564 H0                                     ; allow movement of axes that have not been homed
M400
M18                     				    ; disable the motor

;macro
G91 				        ; set to relative positioning
M564 H0                     ; allow movement of axes that have not been homed

;motor settings
M569 P0 S1 R0               ; set direction of movement and polarity
M350 X16                    ; set microstepping mode for x axis
M92 X200                    ; set steps per mm for x axis

G1 X33 F1000                ; move on x axis

M400                        ; wait for the movements to end
M18                         ; disable the motor

G90                         ; set to absolute positioning

I'm using a Duet 3 6XD 3.4.6 with a NEMA 17 0.5Nm 1.7A with a step of 1.8° (M1173041). I also have to use an external driver for the motor (TB6600).

dc42

@JeanC currently you have configured 80 microsteps per degree in your M92 command, and commanding X to move by amount 33 turns it 360 degrees. This implies that your actual mictosteps per degree is 80 * 33/360 = 7.3333. If you use that value in M92 instead of 80, then the X parameter in your G1 command should correspond to the position in degrees.

JeanC

@dc42 Thank for replying.
But I was wondering what parameters I have to put in the motor settings to have a perfect rotation of 360°. Because the 33 is a value that I approximated using my eyes but it's not a perfect rotation. Or is there a command to control a stepper motor only in degrees of rotation and not in a linear axis ?
Otherwise, thank you very much for your response!