Scale is doubled, steps/mm no help

  • After initial calibration on my Delta (formerly anycubic predator) the X,Y, and Z are moving 200mm when commanded to move 100. Found this beauty out when I jammed my smart effector into the bed 😞

    Steps on the reprap calibration tool were at 80 so I changed to 40 to halve it, and no change was made. What am I missing here? Thanks in advance!

  • post your config.
    maybe you selected the wrong microstepping. i.e x8 instead of x16

  • also check your Config-overide file to see if anything has got in there?

  • @Veti Here's my most recent try at a config. I'm super new to this so it might be a very obvious mistake

    ; Configuration file for Duet WiFi (firmware version 2.03)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool v2.1.4 on Sat Dec 21 2019 01:10:13 GMT-0600 (Central Standard Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"My Printer" ; set printer name
    M665 R247 L442 B177 H402 ; 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

    ; Network
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0 S0 ; physical drive 0 goes backwards
    M569 P1 S0 ; physical drive 1 goes backwards
    M569 P2 S0 ; physical drive 2 goes backwards
    M569 P3 S1 ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3 ; set drive mapping
    M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
    M92 X160.00 Y160.00 Z160.00 E663.00 ; set steps per mm
    M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
    M201 X1000.00 Y1000.00 Z1000.00 E1000.00 ; set accelerations (mm/s^2)
    M906 X1500 Y1500 Z1500 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 Z0 S1 ; set minimum Z

    ; Endstops
    M574 X2 Y2 Z2 S1 ; set active high endstops

    ; Z-Probe
    M558 P5 R0.4 H5 F1200 T6000 ; set Z probe type to effector and the dive height + speeds
    G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
    M557 R247 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 X200 ; configure PT100 for heater 1
    M143 H1 S280 ; set temperature limit for heater 1 to 280C

    ; Fans
    M106 P0 S1 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

    ; 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

    ; Custom settings are not defined

  • Moderator

    @Reista said in Scale is doubled, steps/mm no help:

    M92 X160.00 Y160.00 Z160.00 E663.00 ; set steps per mm

    Doesn’t look like you halved it, you doubled it! Change the X160 Y160 Z160 to X80 Y80 Z80


  • @droftarts Nothing was working no matter what the number it was 2x. After putting in some .9 degree motors who's data sheet i had in hand to be sure i was fiddling with settings even more and Z was set to ballscrew! (not by me, this was a fresh config file) but after changing it to belt and restarting all seems to be well. I told you it would probably be something stupid lol Thanks for the help guys

    These new drives are buttery smooth, but also maybe that's just the duet 🤷

  • @Reista Glad you got sorted. For future reference, always mention that you use 0.9 degree motors because if don't, people will assume that you are using the more common 1.8 degree motors. So for 20 tooth 2mm pitch pulleys, your steps per mm are indeed 160 but if you were using the more common 1.8 degree motors, they would be 80.

Log in to reply