Endstop issue - stopping delay



  • I have an endstop issue.
    I have a Makerbot clone (CTC) and have replaced the control board with a Duet WiFi.
    When clicking on XHome head moves ok; upon pressing the endstop with my finger I can see the x movement actually increases slightly, and carries on for about 7mm, then stops.
    If I leave the head to track across it crashes into the endstop.
    The endstops seem to work ok, in that LED illuminates on duet when pressed.
    I suspect I am missing something in my code!

    HOMEX.G
    ; generated by RepRapFirmware Configuration Tool on Sun Jan 14 2018 11:51:47 GMT+0000 (GMT Standard Time)
    G91 ; relative positioning
    G1 Z5 F600 ; lift Z relative to current position
    G1 S1 X-280 F400 ; move quickly to X axis endstop and stop there (first pass)
    G1 X-5 F600 ; go back a few mm
    G1 S1 X-233 F400 ; move slowly to X axis endstop once more (second pass)
    G1 Z-5 F600 ; lower Z again
    G90 ; back to absolute positioning

    CONFIG.G
    ; Configuration file for Duet WiFi (firmware version 1.20 or newer)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Sun Jan 14 2018 11:51:46 GMT+0000 (GMT Standard Time)

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates…
    M83 ; ...but relative extruder moves
    M555 P2 ; Set firmware compatibility to look like Marlin
    M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Configure automatic saving on power loss
    M208 X0 Y0 Z0 S1 ; Set axis minima
    M208 X228 Y148 Z156 S0 ; Set axis maxima

    ; Endstops
    M574 X2 Y1 S0 ; Set active low endstops
    M558 P0 H5 F120 T600 ; Disable Z probe but set dive height, probe speed and travel speed
    M557 X15:213 Y15:133 S20 ; Define mesh grid

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards
    M569 P4 S1 ; Drive 4 goes forwards
    M350 X16 Y16 Z8 E16:16 I1 ; Configure microstepping with interpolation
    M92 X94.118 Y94.118 Z1280 E420:420 ; Set steps per mm
    M566 X900 Y900 Z12 E120:120 ; Set maximum instantaneous speed changes (mm/min)
    M203 X6000 Y6000 Z180 E1200:1200 ; Set maximum speeds (mm/min)
    M201 X500 Y20 Z250 E250:250 ; Set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800:800 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T110000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T95000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S270 ; Set temperature limit for heater 1 to 270C
    M305 P2 T95000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 2
    M143 H2 S270 ; Set temperature limit for heater 2 to 270C

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

    ; Network
    M550 PCTCdu ; Set machine name
    M551 Pxxxxxxx ; Set password
    M552 S1 ; Enable network
    M587 S"abcdefghijkl123" P"abcdefghijkl123" ; Configure access point. You can delete this line once connected
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

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

    ; Custom settings
    G21
    M558 P0

    ; Miscellaneous
    M501 ; Load saved parameters from non-volatile memory



  • One thing that leaps out at me is that you don't move away from the end stop, you move further towards it. You have this….....

    G1 S1 X-280 F400 ; move quickly to X axis endstop and stop there (first pass)
    G1 X-5 F600 ; go back a few mm
    G1 S1 X-233 F400 ; move slowly to X axis endstop once more (second pass)

    That second line should be
    G1 X5 F600

    That is to say, take out the minus sign.
    HTH


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