drawing is printing a lot smaller than object measures in onshape

julian_carr097

I apologize, I'm new at this, so I am still learning. I didn't want to ask for help since I need to know this, but I've tried for the past 3 days and I'm getting no where.

I get everything created in Onshape, export it to an STL file, and open it in Bambu Studio. When I go to print it, it is less than half the indicated size in the drawing and in Bambu. I've shared the files here. If anyone wouldn't mind taking a look at them and see if you can figure out what I've done wrong, I'd really appreciate it.

Thanks,

J.

Try 3.zip

nick_papageorge_dayjob

Wild goose chase… I downloaded your files. Both the 3mf in bambu and the stl in onshape measure 11.7mm tall. The slicer in Bambu looks good.

The issue is your calipers! First, you are not measuring properly in the jaws. Your part looks to be in the undercut area of the jaws. Second, your calipers were not zeroed before you started. The printed mm scale clearly shows over 10mm, while the digital display shows 4mm.

martin_kopplow

Less than half? About a factor of 1/2,54? Smells like an inch/metric conversion issue. You probably need to check te unit settings.

wille_j

Huh, my first though was unit differences. I.e. export in inch from Onshape and import in Bambu Studio as cm, or vise versa, but it don't seem like that's the case since Bambu Studio is showing the same dimension. STL is by definition dimensionless, so any import/export needs to be told what unit interpret the values as. But this don't seem to be the case here.

Does other things print in the correct size from Bambu Studio?

Gut feel is that there's a unit mismatch in Bambu Studio/ Gcode/printer settings, but I've not used Bambu Studio myself so I can't tell you where to exactly look. But I'd look for export or printer settings in Bambu Studio, and some machine settings menu on the machine. Double check that all units match in all places you can find.

nick_papageorge_dayjob

Export as step instead of stl. Stl doesn’t carry-forward units between different cad systems. Step does.

nick_papageorge_dayjob

Although agree with Willie above. Something is not adding up because the measurement on your Bambu Studio screenshot matches the Onshape CAD.

nick_papageorge_dayjob

Wild goose chase… I downloaded your files. Both the 3mf in bambu and the stl in onshape measure 11.7mm tall. The slicer in Bambu looks good.

The issue is your calipers! First, you are not measuring properly in the jaws. Your part looks to be in the undercut area of the jaws. Second, your calipers were not zeroed before you started. The printed mm scale clearly shows over 10mm, while the digital display shows 4mm.

julian_carr097

https://forum.onshape.com/discussion/comment/128791#Comment_128791

you hit the nail on the head! I actually was zeroing out my calipers when I was using them but for some reason the calipers weren't measuring correctly. I ended up having to do a battery pull to get it fixed.