Y-stepper noise


  • Moderator

    @Pertti said in Y-stepper noise:

    M906 X800 Y1600 Z1600 E1000

    What stepper motors do you have on X, Y and Z? You've set the current on the Y to double X, which will make it noisier, though I'd expect Z to be noisy too.

    What Duet board do you have? You said Duet Wifi, but your config says you have a Maestro, and is set up for Ethernet, not Wifi. send M115 and post response.

    Also, 1.6A is the maximum on a Maestro, though in my testing I couldn't get the driver to overheat at this setting.

    Ian



  • I have two parallel nema 17 motors in y-axis. Z has Nema 23.

    @droftarts said in Y-stepper noise:

    M115

    M115
    

    FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 2.05 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2019-12-13b1



  • There are some other problems like the heater 2 is not fast enough and cuts the heating because of too slow heating. (green line). Does the red curve look ok?
    Sieppaa.JPG


  • Moderator

    @Pertti said in Y-stepper noise:

    I have two parallel nema 17 motors in y-axis.

    I expect that's where the noise is coming from, due to the high current you're using. You could wire them in series, which is recommended, and reduce the current. What happens when you connect the X motor to Y stepper driver, and set M906 Y800? Does it go quiet then?

    Remember to turn off power when you disconnect/reconnect motors, or you may damage the stepper driver.

    Ian


  • Moderator

    @Pertti No, that doesn't look right for heater 2, and heater 1 should be more stable than that.

    As you have Duet Wifi, but your config.g is set for Duet Maestro, there are some errors:

    M918 P1 E4 F2000000 ; configure direct-connect display
    

    Not needed, you can't connect this display to Duet Wifi

    M552 P0.0.0.0 S1 ; enable network and acquire dynamic address via DHCP
    

    Not needed, M552 S1 does this for Wifi

    M303 H1 S240 ; auto tune heater 1, default PWM, 240C target or maximum temperature
    M303 ; report the auto-tune status or last result
    M307 H0
    Heater 0 model: gain 199.0, time constant 962.6, dead time 4.5, max PWM 1.00, calibration voltage 12.3
    M307 H0 A199.0 C962.6 D4.5 V12.3 B0
    M570 H1 P4 T30
    M570 H2 P4 T30
    

    Remove this whole section, it's causing problems. Because...

    M305 P0 T80000 B4092 R2200 ; set thermistor + ADC parameters for heater 0
    ...
    M305 P1 T80000 B4700 R2200 ; set thermistor + ADC parameters for heater 1 vB4092
    ...
    M305 P2 T100000 B4700 R2200 ; set thermistor + ADC parameters for heater 2
    

    Your thermistor settings (ie temperature monitoring are incorrect for Duet Wifi. The R value should be R4700 for Duet Wifi; it's R2200 for Duet Maestro. What thermistors are fitted, or what hot end is this? E3D V6 or something similar? Getting the thermistor settings correct should give you accurate temperatures.

    Once you have corrected these, then try tuning your hot ends with M303.

    Ian



  • @droftarts said in Y-stepper noise:

    M906 Y800

    I have tried all kinds of setups, parallel and serial, x,y,z etc.
    I changed the y current to 800 but then the other motor refused to turn. I changed back to 1600 and bingo, no noise!!!!!!!!!!!!
    I really don´t know what happened.
    Thanks!
    Next I´m trying to dualextrude.
    Heating needs also some study.



  • 20200111_100453.jpg
    Here is my thermistor and hotend. The belong to Leapfrog Creatr. That´s all can tell.
    Seems that I can settle the undulating red heath curve flat by M303 H1 S240 but it helps until I switch the machine off. I´d like to start the heating automatically by the uploaded gcode.
    I also wonder how can I cold extrude the second extruder, what is the code?



  • @Pertti said in Y-stepper noise:

    Here is my thermistor and hotend. The belong to Leapfrog Creatr. That´s all can tell.

    measure the resistance at room temperature (25C) then using a known thermometer bring water to boiling (100C) and measure the resistance. that will let you caluculate the beta value.



  • E1: 116.5 kOhm 22 degrees C , 7.0 kOhm at boiling water



  • from the table it seems to match a B3950 thermistor

    https://www.makeralot.com/download/Reprap-Hotend-Thermistor-NTC-3950-100K.pdf



  • Thanks Veti. Next step?



  • For some reason my thermistors lost their resistance after boiling them in hot water...


  • Moderator

    @Pertti Maybe they need to dry out?



  • Yes indeed, now that they are dry they work fine. But the board has something wrong. The bed thermistor pins work ok with boiled thermistors, but the heater thermistor pins give 2000 degrees when tested with the "unboiled" bed thermistor.



  • I also made changes to the config.g. I wonder if it has something to do with the problem.
    ; Heaters
    M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; set temperature limit for heater 0 to 120C
    M305 P1 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; set temperature limit for heater 1 to 280C
    M305 P2 T100 B3950 R4700 ; set thermistor + ADC parameters for heater 2
    M143 H2 S280
    ; set temperature limit for heater 2 to 280C
    M307 H1 A455.9 C183.2 D17.7 S1.00 V24.1 B0
    M307 H2 A499.7 C172.7 D10.4 S1.00 V24.1 B0



  • I think there´s something wrong with the board. Heaters.JPG
    Some fuse I guess?



  • @Pertti that just means you haven't set up the temperature sensor correctly.
    Your T values look a little low.
    Can you post your latest config settings?



  • This post is deleted!


  • I told above that I boiled the thermistors when calibrated them and after that this happened.



  • New fuse is installed, but no effect. 20200209_203910.jpg


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