Spare part print issue?
I have printed a extrusion idler to have as a spare part
The holes are not round..
Anybody have any tricks to fix this or do i have to process them in order to get a good fit?
I hace included the gcode for anyone to evaluate.
Cheers.
Best Answer by Diem:
you have to fine-tune the prints efter they are finished
It is a mistake to imagine you are printing perfect finished parts. Better to think of it like casting; you are making custom blanks which you will finish before use.
RE: Spare part print issue?
You can almost certainly improve the circularity by careful tweaking of the slice ... but it's quicker and easier to post-process with a needle file or drill bit.
Cheerio,
RE:
I did use a countersink to round up the hole after I posted this and it looks much nicer 👍🏻
I do not want to use a drill to make the hole bigger so the pin for the bondtech gear does not fit.
I guess that even if everything is in order you have to fine-tune the prints efter they are finished
RE: Spare part print issue?
...I guess that even if everything is in order you have to fine-tune the prints efter they are finished
No. If part is properly ("printer friendly") designed, then there should be no need to do that manually.
Circular holes/pockets that are printed vertically, will never have perfect circular shape. Because of that, designer who takes care, will never use simple circle for vertically printed holes.
I just checked this extruder idler, and sadly, designer didn't bother.. he just used a circle.
[Mini+] [MK3S+BEAR]
A question of priorities
[...] The holes are not round..
Anybody have any tricks to fix this or do i have to process them in order to get a good fit?
It's really a question of where you want to put your time and effort. If I am designing the part, I'll try to avoid the problem. If I'm just printing off a part as a one-off or I don't have the design files, I take a rat-tail file to those holes and be done with it. I do this frequently with M5 GoPro mounts.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
.
you have to fine-tune the prints efter they are finished
It is a mistake to imagine you are printing perfect finished parts. Better to think of it like casting; you are making custom blanks which you will finish before use.
RE: Spare part print issue?
I downloaded the STL from Prusa website and followed the instructions
Is there any other parameters in Prusa slicer that can be altered with to make this print usable for a spare part of is it good to go?
I do not have the original part that came with the printe to compare with as it is already mounted on the extruder
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You could play with alignment, temperatures and speeds but really its an initial design issue - here we can assume that as a great many have been printed and used sucessfully the design tolerances are sufficient for the intended use.
Cheerio,
RE: Spare part print issue?
Agree with @diem on that. You can try various settings in slicer and maybe you can get better result.. but is kinda a waste of filament and time in this case. Just take a drill and take your time -it will still be faster than experimenting with slicer.
Anyway, in my previous post, I was only explaining why that happens -just so you wouldn't think there's something wrong with your printer. But then, no printer is perfectly adjusted... 😏 .
[Mini+] [MK3S+BEAR]