not printing with correct mesurements

flopes_ct

Hi everyone,

This is my first post here so I hope someone can help me out.

I have an i3 prusa mk2 printer and I want to print some files that need to be precise.

I am using sketchup to draw the part and then I export to .stl to print. I open the .stl file with repetier host V1.6.2 and when printing the part I have a difference of about 4mm on all the axes. I opened the .stl file with another program to be sure of the size and everything is ok, I guess it must be some parameter in slicer that makes the part reduce in size.

Anyone could help me out? Thank you soo much

Filipe

Repetier

More likely is a wrong steps per mm resolution in firmware settings.

flopes_ct

ok, I will have a look, any idea how many mm per step it should be?

flopes_ct

BTW thanks for the very fast reply

MartinH

post a link to your .stl and i will test for you.

at 1/16 microstepping motors

normall steps/mm on a I3 is X80 Y80

Z depends what type srew rods are fitted.

4000 for M5 0.8 pitch threaded rods. 2560 for M8 1.2 pitch threaded rods ,400 for M8 4 start leadscrews,

flopes_ct

here it goes

https://www.dropbox.com/s/7pserpjvk6gqhf1/front_1.stl?dl=0</div><div>

here is what my config for my i3 prusa was at default, I did not change it yet

https://www.dropbox.com/s/esfc4azs2hm0iww/Image%205.png?dl=0 </div>

MartinH

stl comes out at aprox 157x92 when loaded into my RH

flopes_ct

yep, that's exactly it.