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Design for 3D-Printing

(blog.rahix.de)
837 points q3k | 1 comments | | HN request time: 0.001s | source
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alnwlsn ◴[] No.43894957[source]
In the old days you needed to be a lot more cautious with sharp corners.

If you print into a sharp corner, the hotend has to decelerate to a stop and then accelerate in the new direction. During this time, a little extra plastic will leak out of the nozzle. You can soften this transition with a rounded over corner.

Current printers usually have pressure advance, so this is a lot less important now.

replies(1): >>43926996 #
1. Ccecil ◴[] No.43926996[source]
Pressure advance has been around for at least a decade with many people using it.

I would say the biggest gain for the newer (cheaper) printers have is the input shaping and resonance tuning. This allowed for running higher accels/speeds with a machine that is less mechanically sound. Followed closely by the lack of slicer options and forcing use of branded filament, eliminating those choices makes it easier to make a slicer profile that is repeatable (in my case I have been using Atomic filament and the same basic slicer profile for close to 10 years).

In my shop...I still don't use advance or input shaping...but I build machines with very solid frames. The gains from input shaping seem to be less based on how solid the frame/motion is (based on what I have seen). Current printer is ~10 years old, still solid. Not as fast as the corexy (due to leadscrew drive) but prints very well and has a 320mm cubed area. Without pressure advance or other magic tricks I print at 100mm/s with PLA @150-200mm/s travels, not to mention I have a very heavy extruder.