Show all posts by user
Printing issues ...
What is your nozzle diameter, how do you know, and what is the nozzle diameter set in your slicer?
by
IMBoring25
-
Printing
Depending on what type of feature you're dimensioning, +/- .1 to .2 mm can be in the neighborhood where you have to start paying significantly extra at traditional manufacturing operations using traditional, truly industrial-grade machining and forming equipment. That's not a bad tolerance in most types of work. To do better will take some significant OCD with accurate diameters for a high-qual
by
IMBoring25
-
General
The smaller the individual object cross-sections, the greater risk of dramatic slow-down and/or print quality problems associated with sequential printing.
Numerous print quality problems can arise when you try to lay another layer on a layer that hasn't yet solidified. If you have not properly set a minimum layer time for your material and temperatures (or even if you have and you hit the mini
by
IMBoring25
-
Reprappers
Slic3r does have this functionality, in Print Settings --> Output Options. There's a Sequential Printing section with a Complete individual objects checkbox and dimensions for the size of your print head.
In addition to the risk of collisions with previously-printed parts (which properly setting the print head clearance dimensions should mitigate) note also that the print is likely to take l
by
IMBoring25
-
Reprappers
For one thing, every printer is different. A given thermistor reading might men different things for the print surface depending on placement of the thermistor and the construction of the bed.
All the temperatures you list, if taken as actual print surface temperatures, are too hot for PLA. It is generally regarded you don't want to go over the glass transition temperature of the material, whi
by
IMBoring25
-
Printing
You can set endstop coordinates and/or nozzle offsets in the firmware and/or EEPROM to put the (0,0,0) position at some logical location over the bed. The slicer doesn't care, as long as the firmware and slicer settings are compatible, but it does make for more logical inputs when you're driving the tool head(s) around manually with g-code.
by
IMBoring25
-
Slic3r
Even with a closed firmware there should be some way to recalibrate the extruder. Passing gcode M503 should show if your EEPROM is setting your steps per mm. Failing that, you could use a 1.25 extrusion multiplier in Slic3r.
by
IMBoring25
-
Slic3r
Good luck...I'm not seeing that without support. Better than what I was anticipating, but not by much.
by
IMBoring25
-
Slic3r
Quote3Dmaker4U
What I do not get by looking to your pictures is how the bottom of the case will be printed... in the air? I see no support, so I cannot imagine how print will continue.
That's a profoundly salient point, and it may solve everything. Not only is the bridging about to become a problem the way it's being done now, but if the part in question is such that it can be printed upside-do
by
IMBoring25
-
Slic3r
Yes, even at 3x scale it looks like your cooling settings are likely driving your speed on that.
by
IMBoring25
-
Slic3r
You don't mention bed temperature. That may be on the high side. Aside from that, you can keep trying speeds and temperatures or working with a part fan. That said...
I had a hot-end fan shroud I was trying to print (out of ABS) that had a similar aggressive overhang starting with the first layer and gave me so much of the condition you're seeing I got impatient with repeated attempts and cha
by
IMBoring25
-
Slic3r
Exactly what settings did you change to 25 mm/s? All the printing move speeds?
How big are the slices of the part you're printing and what are your cooling settings? If it's a part with small layer cross-sections and you have a conservative minimum layer time, you might already be at less than 25 mm/s.
by
IMBoring25
-
Slic3r
Chimney effect is a special case of convective heat loss. Because the air in the chimney is warmer than the ambient air outside, it causes an updraft in the chimney that carries out the air, and the heat with it. You will have exactly this same effect in the air in your build environment regardless unless you put a lid on it. Enclosed sides will not cause more heat loss than open sides but you
by
IMBoring25
-
Reprappers
Around the time I added the MatterControl software for my Rostock to the laptop I've been using to control the printers, all installed versions of Slic3r...Legacy, current stable, current experimental, you name it...started consistently crashing on me (as did MatterControl, from the beginning). I switched the Rostock to Repetier and am running latest experimental Slic3r on another (more powerful
by
IMBoring25
-
Slic3r
Converting curved surfaces to polygons is always lossy. Most programs can be configured for how much tradeoff you want between accuracy and polygon count. Not having used native AutoCad I'm not sure if it is one of them. SolidWorks is.
by
IMBoring25
-
Printing
Are you by chance SD printing? If you have the checkboxes to include start and finish gcode selected when uploading your file to the SD card that may be messing with your results.
by
IMBoring25
-
Slic3r
Automation only works as long as it works, though. On the commercial machine at work, when its bed leveling algorithm decides the build platform is bent you have no choice but to try more build platforms until you find one it likes, and it seems to be both far more susceptible to nozzle jams than my machines and far more work to clear a jam when one occurs.
by
IMBoring25
-
General
That's the right answer. There's no such thing as a 3D printer that's maintenance/adjustment free, and it will be really expensive to try to get close.
by
IMBoring25
-
General
Do they exist? Yes. SeeMeCNC has one they call the PartDaddy with a build volume of over three cubic meters. Are they readily available as kits to the general population or cost-effective or practical for the average hobbyist? Not to my knowledge. Numerous design challenges that drive cost and complexity scale non-linearly with build volume.
by
IMBoring25
-
General
To do what you're wanting to do directly in Slic3r you'd need the ability to perform math and/or use conditional statements on the Slic3r environment variables, and I've not found any documentation suggesting either is currently possible.
What you can do is add a commented line to the layer-change G-code to make it easier to find and modify after the fact, either for a post-processing script or
by
IMBoring25
-
Slic3r
Wow, that's goofy. They designed the machine so you have to look at it from the back to see it as the slicers and interface programs do.
How comfortable are you with editing firmware? I'm still barely getting into it myself but I think it would look like this to do it without changing any hardware or wiring:
In pins.h:
Reverse the pin numbers for X_MIN_PIN and X_MAX_PIN
Reverse the pin numbe
by
IMBoring25
-
Printing
You don't mention what version you're using, but the experimental branch of Slic3r does currently support this.
Under Print Settings, then Output Options there's a checkbox for Complete Individual Objects, which will print the objects sequentially, and then the only thing you have to manually modify in the G-code would be to input the temperature-change commands each time Z goes back to the firs
by
IMBoring25
-
Slic3r
If you don't want to tinker, this may not be the hobby for you. I occasionally work with a commercial RP machine at work that ran $20,000 when it was new and it's still a fiddly piece of equipment...In some ways even more so than my home machines.
The writeup on that Hephestos amuses me...That they thoughtfully omitted the heated bed to reduce burn risk and lower power consumption was very cons
by
IMBoring25
-
General
In my experience, Opus is correct...Infill only where needed only changes the result under a sloping side face.
As for infilling every n layers, I don't know how much checking is in the code...It may specifically not be doing it if n times your layer height is more than your nozzle diameter.
You can manually create internal voids in the model, provided you give some consideration to having adeq
by
IMBoring25
-
Slic3r
The experimental branch of Slic3r supports modifiers that will let you use different settings for different portions of a part.
by
IMBoring25
-
Printing
The RepRapPro design differs from the stock i3.
Anyone with a printer should be able to make the printed parts. There's a section of the forum here specifically for people offering that service. RepRapPro makes the basic STLs available on their github. Sourcing them separately might allow you to find them from someone who will make them of different materials, different colors, or modified de
by
IMBoring25
-
General
You may have a non-manifold STL that Cura is handling more gracefully. Slic3r has a tendency to repeat the previous layer when encountering a non-manifold condition. Look for a note about a number of errors. If there is one, running it through Netfabb or another program with the ability to repair broken STLs could help.
by
IMBoring25
-
Slic3r
You don't say what kind of machine you have or what settings you're using now, but you're probably either skipping motor steps or belt teeth. Could be too fast motion, motor driver voltage incorrect, axis binding, belts too loose or too tight...
by
IMBoring25
-
Printing
It only costs you build volume if the overall dimension of the machine is fixed. While moving the bed in X or Y does mean the overall dimension which that axis can occupy during use has to be slightly over twice the intended build distance on that axis, this doesn't result in an unreasonably sized machine at the build volumes of the most common RepRap designs. As build volume increases, it beco
by
IMBoring25
-
Reprappers
There are a lot of reasons for this, many of which are outlined in the Slic3r manual at . Correct the listed issues you can correct. If you still need tighter tolerances you may need to compensate your STLs or be willing to fettle the holes.
by
IMBoring25
-
Printing