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rosmo-robot / Rosmo_3D

3D printing and design files
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Reduce size of 'rear connector' to correspond to lego hole #9

Closed samuk closed 2 years ago

samuk commented 2 years ago
legoaxle

The connector part is too large and does not fit into the wheel

sathya131295 commented 2 years ago

-0.5mm reduction on all sides would do?

samuk commented 2 years ago

Yes i think so.

samuk commented 2 years ago

The circular part could do with being around 1mm thicker too I think to give clearance between lego sprocket and robot body IMG_20220119_091617

IMG_20220119_091623

runger1101001 commented 2 years ago

hey, as an aside comment, for my 3D-printable designs with press-fitting parts or screw-holes, I always introduce a parameter (I call it "tolerance" but I'm sure there's a better name). I use this parameter on all the close-fitting parts, either adding or subtracting it from the dimension involved. Then I can adapt the model to new 3D printers or filaments just by changing one parameter.

I have 3 printers and like to try different materials now and then. And I can tell you that each printer and material have slightly different properties regarding dimensional accuracy.

0.5mm is the kind of tolerance that needs to be changed depending on the printer, filament and how "tight" you want the fit to be. Depending on these things I might set it to 0.0, 0.25, or even 0.8...

Often I will then export a series of STLs with slightly changed tolerance settings, print them all, and see which fits best...

samuk commented 2 years ago

IMG_20220119_143713

This connector should match the front connector in terms of depth? So that front and rear wheels align

sathya131295 commented 2 years ago

@runger1101001 Yes, I too call it "tolerance", a well calibrated printer can do with 0.2mm tolerance is guess. @samuk I shall increase the size of all the slots by 0.5mm.

sathya131295 commented 2 years ago

Added some clearance for "rear connector"