Endstop on second x axis not detected



  • Afternoon all,

    I have designed and built my own IDEX printer, it has 2 independent X and Z axis.
    My V axis which is the second X axis refuses to home, limit switch is configured to NC, the Duet 2 wifi and Duex boards LED indicate when limit switches are compressed.

    Any help would be greatly appreciated

    ; General preferences
    G21 ; Work in mm
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"" ; set printer name

    ; Network
    M551 P"" ; set password
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0 S1 ; physical drive 0 goes Forwards X
    M569 P1 S0 ; physical drive 1 goes Backwards Y
    M569 P2 S0 ; physical drive 2 goes Backwards Z
    M569 P3 S0 ; physical drive 3 goes Backwards Vx
    M569 P4 S1 ; physical drive 4 goes Forwards Uz
    M569 P5 S0 ; physical drive 5 goes backwards E0
    M569 P6 S0 ; physical drive 7 goes forwards E1

    M584 X0 Y1 Z2 V3 U4 E5:6 ; set drive mapping
    M350 X16 V16 U16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation,
    M92 X160.00 V160.00 Y160.00 Z800.00 U800.00 E873.08:873.08 ; set steps per mm
    M566 X900.00 V900.00 U12.00 Y900.00 Z12.00 E120.00:120.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 V6000.00 U360.00 Y6000.00 Z360.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
    M201 X500.00 V500.00 U20.00 Y500.00 Z20.00 E250.00:250.00 ; set accelerations (mm/s^2)
    M906 X1000 U1000 V1000 Y1000 Z1000 E1000:1000 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 Z0 V0 U0 Y0 Z0 S1 ; set axis minima
    M208 X210 V210 U210 Y360 Z210 S0 ; set axis maxima

    ; Endstops
    M574 X1 V1 Y1 S0 ; set active low endstops
    M574 Z0 U0 S2 ; set endstops controlled by probe

    ; Z-Probe
    M558 P7 H5 F240 T6000 ; set Z probe type to switch and the dive height + speeds
    G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
    M557 X15:210 Y15:360 S20 ; define mesh grid

    ; U-Probe
    M558 P7 H5 F240 T6000 ; set U probe type to switch and the dive height + speeds
    G31 P500 V0 Y0 U2.5 ; set U probe trigger value, offset and trigger height
    M557 V15:210 Y15:360 S20 ; define mesh grid

    ; 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 T100000 B4725 C7.060000e-8 R4700 ; set thermistor + ADC parameters for heater 1
    M143 H1 S260 ; set temperature limit for heater 1 to 260C
    M305 P2 T100000 B4725 C7.060000e-8 R4700 ; set thermistor + ADC parameters for heater 2
    M143 H2 S260 ; set temperature limit for heater 2 to 260C

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H-1 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P2 S1 I0 F500 H1 T45 ; set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P3 S1 I0 F500 H2 T45 ; set fan 3 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; Tools
    M563 P0 D0 H1 F0 ; 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 P1 D1 H2 F1 ; define tool 1
    G10 P1 V0 Y0 U0 ; set tool 1 axis offsets
    G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C

    ; Custom settings are not defined


  • administrators

    Can you confirm that you have the V endstop switch connected to E0stop, and the U endstop switch connected to E1stop ?

    Edit: I just spotted this in your config.g:

    M574 Z0 U0 S2 ; set endstops controlled by probe

    S2 in that line is wrong for both Z and U, unless you really are using the Z probe as the U endstop.



  • I can confirm V is in E0, compressing the switch also confirms by LED

    Nothing in E1stop

    I am currently using z probe for both Z and U



  • although the probe says triggered when not compressed and not triggered when I compress it, seems to be backwards


  • administrators

    @nevur said in Endstop on second x axis not detected:

    although the probe says triggered when not compressed and not triggered when I compress it, seems to be backwards

    then you need to add parameter i1 to your m558 command.



  • @dc42

    now fixed! I didn't realise drive mapping didnt map end stops and V is E1
    now working as intended

    thank you


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