I would add to what @Smithy says: when you print the test parts with holes/slots in them, make sure they are 2-4mm thick. If there’s any elephants foot going on, the first layer or two will be significantly smaller than the rest of the hole. This can be easily remedied with a craft knife after printing,
What clearance should I leave between parts that are supposed to fit together perfectly when using a .6mm diameter nozzel?
Usually I also start with a clearance of 0.2mm, and then adjust as trial and error indicates. However this is on a 0.4mm nozzle.
As Smithy says, small holes tend to get closed down a bit, and small rods tend to get too big (slightly overextruding). Also layer height has a big influence, as well as the amount of blogs, strings, ringing and other defects.
Probably you will need to post-process tiny holes anyway. I always go through them with a drill (see pic): manually, not electrically, because that melts the plastic.
The tiny purple things probably won't print correctly at all, so you would be better off using standard nylon screws or pins, or whatever you need.
4 hours ago, geert_2 said:The tiny purple things probably won't print correctly at all, so you would be better off using standard nylon screws or pins, or whatever you need.
That was my thought initially, but with the scale @sean513 mentioned they look like they are 3-4mm diameter. Should print fine, but probably want to be sure there are taller parts and/or cooling towers being printed at the same time.
Trial and error indeed. For instance, after some trials with PLA and my usual settings I came up with 0.1mm.
Worked great with whatever I printed but trying to print the same things with ABS messed up the fitment.
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Smithy 1,146
This is very difficult to say and depends on many factors. Material, layer height, printing speed, flow, temperature etc. all have an influence on accuracy.
I usually start 0.2mm clearance and split the object to make a few test prints that are printed quickly.
Also keep in mind that holes are generally smaller with 3D printing than you drew them. As a guide you can assume 0.4mm.
Try to extract the relevant parts of your model to quickly make multiple test prints without having to wait hours.
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