bridge test - run this gcode to find out your bridging speeds. it means your plastic will float above surface!
by jamesvilleneuve, published
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Description
This g code is code from a program i am releasing soon called 3d_simple. This code is a step forward as it visually tells you what you speeds and feeds should be on your printer.
Bridging is the ability to cross over an open area and have the filament stretch and not melt or bend down. This program takes the guess work out!
Just remember to set the temp "M104" in the gcode file to whatever temp you print at.
Bridging is the ability to cross over an open area and have the filament stretch and not melt or bend down. This program takes the guess work out!
Just remember to set the temp "M104" in the gcode file to whatever temp you print at.
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yes. that's right. i am developing a test and a printer style program for the reprap. what i really need is programmers to dive the project into.
That sounds like a really good idea. It's like a 2D printer nozzle/alignment test sheet where you observe the output to determine the correct settings.
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bridge test - run this gcode to find out your bridging speeds. it means your plastic will float above surface! by jamesvilleneuve is licensed under the Public Domain license.
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Instructions
open gcode up and modify the line/lines that say M104 Sxxx, change 'xxx' to the working temp of your machine in Celsius. I'm going to be brave and tell you that a few degrees above what is needed for plastic flow is ok.
the way this test works is it bridges at several feed and extruder rates, you look for the 1st bridge up from the bottom where there is no sagging. (the 3d simple test is more complex, but this will get you in the ballpark)
count lines bridged up until the perfect bridge. use these values based on that info. also keep in mind it is only set for the temp you set code too!
count lines from bottom up, so first bridge up is 1, second bridge from bottom is 2,
count of perfect bridge= extrude rate
20EXTRUDE = .053
19EXTRUDE = .054
18EXTRUDE = .052
17EXTRUDE = .051
16EXTRUDE = .054
15EXTRUDE = .055
14EXTRUDE = .0545
13EXTRUDE = .068
12EXTRUDE = .069
11EXTRUDE = .07
10EXTRUDE = .072
9EXTRUDE = .073
8EXTRUDE = .0735
7EXTRUDE = .075
6EXTRUDE = .0765
5EXTRUDE = .0785
4EXTRUDE = .080
3EXTRUDE = .084
2EXTRUDE = .086
1EXTRUDE = .091
so look for first perfect bridge. then take your feed rate multiply it by the above number to get your feedrate with a bridge! don't slow extruder too much though, although plastic will go thin, it may also break apart.
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That sounds like a really good idea. It's like a 2D printer nozzle/alignment test sheet where you observe the output to determine the correct settings.
yes. that's right. i am developing a test and a printer style program for the reprap. what i really need is programmers to dive the project into.