Need help printing Mars rover as a blind Prusa user
Hello,
I'm attempting to print the Mars Perseverance rober from this link:
https://nasa3d.arc.nasa.gov/detail/M2020-Model-Rover-STLs512020
On the first attempt to print the chassis, I ended up with a spaghetti monster. I've printed other prints before this and they worked fine. This is on the new MK4. I'm using the standard nozzle and 0.15 layer height. Printing using PLA.
When I selected the option in Prusa Slicer to add supports, my print went from 13 hours to over 17 hours. Before I do that, can someone check the chassis file and let me know if I need to do something with rotation or supports to get this to print?
I'm totally blind, so haven't figured out a way to check rotation since I can't look at it.
Thanks much!
RE: Need help printing Mars rover as a blind Prusa user
Ouch, the chassis is placed vertically, only touching the bed with a (probably) back pin. I suggest to rotate it by 90 degrees on the X axis. That will place it on its belly, which is almost flat, only containing some embossed text (the way the benchy has on its bottom). That way it fits on the bed but it is spanning all the way from the front to the back, so I would rotate it another 90 degrees on the Z axis to orient the length left-right same as the bed is.
Some supports (on the plate only) will be needed as there is at least one feature that is almost a 2cm long horizontal overhang. Most of the other overhangs seem to be somewhere around 45 degrees and most probably printable without supports, but they contain some small features that are a bit sharper and will get supports generated anyway on default settings. You could get rid of most of them by setting the overhang threshold to 15 or lower, but that is quite a stretch - I tried higher values but it still gave a lot of supports anyway, so unless you feel very adventurous I would keep the defaults.
RE: Need help printing Mars rover as a blind Prusa user
Awesome! This is the exact info I needed.
Did you have a chance to look at any of the other parts? I think this is the largest one. If the rotation was screwed up on this one, I'm a bit worried about the others.
RE: Need help printing Mars rover as a blind Prusa user
I checked them now and unfortunately it is not good. There are many cylindrical parts laying on their side, couple parts are upside down etc.
Many parts will require supports anyway, but most can be at least rotated properly. But there are some complex ones (probably wheel suspension parts) which are a couple or more of tubes at weird angles.
I will try to re-export the parts in some better orientations and upload it here.
RE: Need help printing Mars rover as a blind Prusa user
That's frustrating. I wonder why they didn't orient the parts correctly.
I really appreciate your help on this.
RE: Need help printing Mars rover as a blind Prusa user
I am attaching the zip archive with a bit over half of the parts rotated. Where it was not straightforward, I went with the variant that needed less time/supports.
RE: Need help printing Mars rover as a blind Prusa user
Awesome! Is this all the parts that needed rotating or are you still working on it?
RE: Need help printing Mars rover as a blind Prusa user
Ah, sorry for that, English is not my first language so I sometimes write weird. All parts that needed rotating (in my opinion) are rotated.
RE: Need help printing Mars rover as a blind Prusa user
Just to buzz in here to help the parts included in the zip file that @jkavalik posted are all ones that I too agree needed rotating and they are now rotated correctly if it still prints funny if your able to a picture could help us
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