Tevo Little Monster converstion - Endstop and Z height issue

  • Hello all,

    My first post on this site. After reading about others conversion of the TLM I decided to go down the same route. I have to say this forum is packed full of info and it has helped me get up and running, a big thank you. Sadly I am stuck with just two problems and I am sure its simple and connected:

    1. When I home not all of the towers make it to the top, I am not sure why. A second home always fixes this problem but if the printer travels over any distance, its seems to be a little bit off. I don't move fast as a slow functional printer is preferable to a fast non functional one.

    2. When I try and print the printer seems to be set to the wrong Z height, to the point I feel the motors could be skipping steps. I did run the test and as I am using a BLTouch. Just to say I read the wiki and the external post regarding that sensor and how to check and set the height.

    This makes me wonder if I am skipping steps, could be another problem but I am at a loss - being so close to finishing the printer any help would be greatly appreciated. ☺

    Files posted below.

    Best regards,



    ; Configuration file for Duet Ethernet (firmware version 1.17)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; General preferences
    M111 S0 ; Debugging off
    G21 ; Work in millimetres
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves
    M555 P1 ; Set firmware compatibility to look like RepRapFirmare
    M665 R157 L397.1073 B200 H520 ; Set delta radius, diagonal rod length, printable radius and homed height
    M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them
    M208 Z0 S1 ; Set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; Define active high microswitches
    M558 P1 X0 Y0 Z0 H5 F120 T6000 ; Set Z probe type to unmodulated, the axes for which it is used and the probe + travel speeds
    M557 R130 S20 ; Define mesh grid

    ; BL-Touch
    M307 H3 A-1 C-1 D-1 ; reserve pin 21 for M42 or servo use
    M558 P9 H5 F200 T5000 ;P9 is a key BLTouch Value
    G31 P25 X0 Y0 Z3.78 ; Set Z probe trigger value, offset and trigger height
    M557 R150 545

    ; 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
    M350 E32 I0 ; Configure microstepping without interpolation
    M350 X32 Y32 Z32 I1 ; Configure microstepping with interpolation
    M92 X160 Y160 Z160 E837 ; Set steps per mm
    M566 X1200 Y1200 Z1200 E3000 ; Set maximum instantaneous speed changes (mm/min)
    M203 X39960 Y39960 Z39960 E3000 ; Set maximum speeds (mm/min)
    M201 X1000 Y1000 Z1000 E1500 ; Set accelerations (mm/s^2)
    M906 X1800 Y1800 Z1800 E1500 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Heaters
    M143 S285 ; Set maximum heater temperature to 285C
    M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4607 C8.950070e-8 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1

    ; 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

    ; Network
    M550 PTEVO Little Monster ; Set machine name
    M540 PBE:EF:DE:AD:FE:ED ; Set MAC address
    M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

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

    ; Custom settings are not configured

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


    ; bed.g
    ; called to perform automatic delta calibration via G32
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; Clear any bed transform

    ; Probe the bed at 6 peripheral and 0 halfway points, and perform 3-factor auto compensation
    ; Before running this, you should have set up your Z-probe trigger height to suit your build, in the G31 command in config.g.
    M98 Pdeployprobe.g
    G30 P0 X0 Y129.9 H0 Z-99999
    G30 P1 X112.5 Y64.95 H0 Z-99999
    G30 P2 X112.5 Y-64.95 H0 Z-99999
    G30 P3 X0 Y-129.9 H0 Z-99999
    G30 P4 X-112.5 Y-64.95 H0 Z-99999
    G30 P5 X-112.5 Y64.95 H0 Z-99999
    G30 P6 X0 Y0 H0 Z-99999 S3
    ; Use S-1 for measurements only, without calculations. Use S4 for endstop heights and Z-height only. Use S6 for full 6 factors
    ; If your Z probe has significantly different trigger heights depending on XY position, adjust the H parameters in the G30 commands accordingly. The value of each H parameter should be (trigger height at that XY position) - (trigger height at centre of bed)

    M98 Pretractprobe.g

    G1 X0 Y0 Z150 F1500
    G1 X0 Y0 Z150 F1500


    M280 P3 S90 I1


    ; homedelta.g
    ; called to home all towers on a delta printer
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; Use relative positioning

    ; Move all towers to the high end stopping at the endstops (first pass)
    G1 X505 Y505 Z505 F1500 S1

    ; Go down a few mm
    G1 X-5 Y-5 Z-5 F1500 S2

    ; Move all towers up once more (second pass)
    G1 X10 Y10 Z10 F360 S1

    ; Move down a few mm so that the nozzle can be centred
    G1 Z-5 F2000

    ; Switch back to absolute positioning and go to the centre
    G1 X0 Y0 F2000


    M280 P3 S160 I1
    M280 P3 S10 I1

  • administrators

    @Tef9, welcome to the forum!

    Your homing issue is covered in the FAQ page in the Troubleshooting section of the documentation.

    You have the maximum speeds set very high in your M203 command. Try reducing the XYZ maximum speeds to 12000 and see if that fixes the missed steps.

  • Hi There,

    Thank you for the reply. Although the speed was set high this was not the issue. The issue lay in the homedelta.g file, I set each axis to 505 instead of 520. All working fine, I have another question, but will post separately. 🙂




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