Many problems (Homing, Z-Axis...)



  • Hello,
    I have the Duet Wifi so far set up and wired unfortunately it does not work as intended.
    First to my printer:
    Its a Core XY with double Z-axis.
    X,Y,Z Motors are Wantai 42BYGHW811. (On the Z-axis I use 2 motors which are connected to both plugs of the board so they are serially connected (I Think).
    Extruder-Motors are 17HS16-2004S1. (But there's only one in use at the moment.)

    Board:
    Duet 2 Wifi
    Firmwarename: RepRapFirmware for Duet 2 WiFi/Ethernet
    Firmware Elektronik: Duet WiFi 1.02 or later
    Firmware Version: 2.02(RTOS) (2018-12-24b1)
    WiFi Server Version: 1.22
    Web Interface Version: 1.22.6
    0_1550421682898_config.g

    I have set the endstops and they seem to work properly so far.
    Unfortunately the axles can't be homed i all time get this error:
    G28 X: Error: Homing failed
    The axes cannot be moved either

    So I tested the test scripts in the UI. The motors are moving.
    At the Z-axis the motors rotate only briefly, then stop and start screeching.

    I hope someone has time and want to make this work with me.

    Greetings



  • @gummix Well the first thing that leaps out at me is that you say it's a CoreXY but the config.g you've posted seems to be for a Delta.



  • Well....
    I dont know why, i was sure i made a new one with core XY...
    I will make an other one and test it again.

    Thanks



  • Ok i will make it with the Beta tool.
    But what are the best axes settings for the Wantai?
    My opinion:
    Microstepping: x16
    Stepps per mm (depends on the used hardware)
    Max Speed Change?
    Max Speed?
    Accele­ration?
    Motor Current (mA)? (I can not find the formula right now)

    Thanks



  • @gummix said in Many problems (Homing, Z-Axis...):

    Microstepping: x16
    Stepps per mm (depends on the used hardware)
    Max Speed Change?
    Max Speed?
    Accele­ration?
    Motor Current (mA)? (I can not find the formula right now)

    • x16 microstepping with interpolation

    • Max speed change, aka Jerk, start at 600mm/min or 10mm/s

    • Max speed should be what you intend to use for your travel moves (18000mm/min or 300mm/s is probably a good max)

    • Accel, start with 6000mm/s^2 for the max. You may want to also configure M204 to set separate accel for print moves and travel moves.

    • For motor currents, target 70-85% of the rated max for the motor.



  • Okay, I've got it now.
    However directly a new problem, I have constant connection breakdowns....

    Failed to connect
    The connection between the browser and your machine has been interrupted.
    Reason: Request Timeout
    Please wait while a new connection is being established...

    I go to the UI website home the axes and making 2-3 movements in the X or Y direction and the connection breaks off....
    It can't reconnect either. Then it only helps to pull the plug


  • administrators



  • U are right.

    Thanks


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