No Interpolation



  • Dear Community
    My name is Daniel 28years old and technically very interested.
    I've been building my printer for a while now. Unfortunately the result of the Duetwifi is not yet satisfying. For some reason the interpolation doesn't work😟 . If I set the micro steps with the command "M350 Y16 I1", then I hear no difference to 16x I0 also 32x 64x 128x 256x sound no different when moving.
    I use the following motors:
    https://en.nanotec.com/products/476-st4209l1704-a/

    https://en.nanotec.com/products/460-st4209s1006-a/

    https://en.nanotec.com/products/483-st5909s1008-a/?tx_nanotec_shop[action]=dispatch&tx_nanotec_shop[controller]=Shop&cHash=8782408f530f85d9ee1efdc2d4afbff6

    Could you please tell me why?
    Here are my complete settings:

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    ; Network
    M552 S1 ; Enable network
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S0 ; Drive 0 goes backwards
    M569 P1 S1 ; Drive 1 goes backwards
    M569 P2 S0 ; Drive 2 goes forwards
    M569 P3 S0 ; Drive 3 goes forwards
    M569 P4 S1 ; Drive 4 goes backwards
    M350 X128 Y128 I0 ; Configure microstepping without interpolation
    M350 E16:16 Z16 I1 ; Configure microstepping with interpolation
    M92 X1284 Y1284 Z1285 E464:464 ; Set steps per mm
    M566 X1500 Y1000 Z1500 E10000:10000 ; Set maximum instantaneous speed changes (mm/min)
    M203 X8000 Y8000 Z500 E18000:18000 ; Set maximum speeds (mm/min)
    M201 X800 Y800 Z40 E600:600 ; Set accelerations (mm/s^2)
    M906 X540 Y1350 Z800 E950:950 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S10

    ; Axis Limits
    M208 X-34 Y0 Z0 S1 ; Set axis minima
    M208 X202 Y195 Z275 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S0 ; Set active low endstops

    ; Z-Probe
    M574 Z1 S2 ; Set endstops controlled by probe
    M558 P1 H5 F300 T6000 ; Set Z probe type to unmodulated and the dive height + speeds
    G31 P500 X15 Y-20 Z2.15 ; Set Z probe trigger value, offset and trigger height
    M557 X0:210 Y0:165 S20 ; Define mesh grid

    ; Heaters
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4725 C0 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S350 ; Set temperature limit for heater 1 to 350C
    M305 P2 T100000 B4725 C0 R4700 ; Set thermistor + ADC parameters for heater 2
    M143 H2 S350 ; Set temperature limit for heater 2 to 350C

    ; Fans
    M106 P0 S0 I1 F500 H1:2 T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P1 S0 I1 F500 H1:2 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 S0 I1 F500 H1:2 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; Tools
    M563 P1 D1 H1 ; Define tool 0
    G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
    G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C
    M563 P0 D0 H2 ; Define tool 1
    G10 P1 X30 Y0 Z0 ; Set tool 1 axis offsets
    G10 P1 R0 S0 ; Set initial tool 1 active and standby temperatures to 0C

    ; Automatic saving after power loss is not enabled

    ; Custom settings are not configured

    If you need anything else to help me, just say something.
    Thank you very much in advance for your help.☺


  • administrators

    Interpolation only works when you have microstepping set to x16.

    The effect of higher microstepping depends a lot on the motor. When using 0.9deg motors, the gain from increasing microstepping beyond x16 or enabling interpolation is smaller than it is using 1.8deg motors.

    There is a facility called coolStep in the TMC2660 drivers that can be used to reduce motor noise. It's configured in the M915 command. See chapter 5 of the Trinamic TMC2660 data sheet for information about how to tune it.

    btw if you put your M92 command before the M350 command in config.g instead of after and use values appropriate to x16 microstepping, then you won't need to adjust the steps/mm in M92 when you change microstepping in M350.



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