slicer scaling behaviour... wild...

  • Hi! I need help with simplify3d scaling… I am trying to print figure as below… In the model external size (marked with red) is 29.214mm and internal circle is 6.4 mm.

    Once printed in 100% scale external is 28.9 and internal is 5.0 ☹ once I adjust scale to 101,08 external prints with tiny difference, but internal is still very small. To print internal in right size I need to use 128% scale ☹ but it drives external size far away…

    Which settings should I consider to be changed?

    Many thanks!

  • Under Other tab on the Process settings you should have Horizontal size compensation. Change that to 0,7mm
    You should be close for the internal diameter.

    But if you made the model, try increasing the dimensions.

  • That's a huge différence; you may have some over-extrusion?

  • At first I also thought of over-extrusion, but then also the outside dimension would be bigger, but it's also smaller.
    Something is not completely OK here.

  • My bad, I mis-read the outer dimensions!

  • @obeliks

    Under Other tab on the Process settings you should have Horizontal size compensation. Change that to 0,7mm

    thanks! that is a very strange parameter for me. with test i have figured out that -0.25 mm worked with my 101,08 scale.. however that ratio brought down external size 🙂 in my particular case i can live with that, but it is very and very strange...

  • Check X and Y steps/mm just to be sure.

  • slicer i guess is a crap... with settings above radial holes are tight as it should be, central one in loose.... in CAD they are all the same..

  • I'm pretty sure you have a hardware/firmware configuration issue... There is absolutely no reason S3D changes holes dimensions depending where they are on the plate.

  • CAD settings are below. as well as motor settings. printer is delta

    M569 P0 S1				; Drive 0 goes forwards
    M569 P1 S1				; Drive 1 goes forwards
    M569 P2 S1				; Drive 2 goes forwards
    M569 P3 S0				; Drive 3 goes forwards (extruder)
    M350 X16 Y16 E16 I1    			; Set 16x microstepping with interpolation
    M574 X2 Y2 Z2 S1			; set endstop configuration (all endstops at high end, active high)
    M666 X0 Y0 Z0				; put your endstop adjustments here, or let auto calibration find them
    M665 R102 L288.17 B75 H152		; set delta radius, diagonal rod length, printable radius and homed height
    ; H152 for standart 
    ; H142 for volcano
    M92 X80 Y80 Z80				; Set axis steps/mm 
    M906 X1250 Y1250 Z1250 E700		; Set motor currents (mA) 85% of rated
    M906 I30				; Set Idle factor to 30%
    M201 X1000 Y1000 Z1000 E120		; Accelerations (mm/s^2)
    M203 X20000 Y20000 Z20000 E600		; Maximum speeds (mm/min)
    M204 P500 T2000				; Maximum Print and Travel acceleration


  • As @OBELIKS said, re-check M92 values. And as your printer is a delta, re-check the calibration.

Log in to reply