gb86217
-
Posts
9 -
Joined
-
Last visited
Never
Content Type
Forums
Events
3D Prints
Posts posted by gb86217
-
-
Oh my god, I am a week behind! is it too late to order a full set? I am from Australia. Thanks.
-
Thank you very much for your help, the scar is happened at where the pattern changes for inline to outline, the wall is printed at two round, at the corner it shakes and start the second round.
-
I have no idea about temperature and noise. The voltage going to the z stepper is probably a little higher is my guess but I'm not an expert. I wouldn't worry too much - these steppers are very tough.
The X axis is connected to the rear side of the ultimaker which is a large piece of wood and I would expect that to be louder. Did you use the newer black plastic spacers for the x motor? Or did you use the wooden spacer? Supposedly the black plastic spacers are quieter.
I am sorry, I have made a mistake, it's actually the Y motor is hotter and louder than X motor.
-
Also the X motor is hotter than Y motor after a hour print, also the X axis has bigger noise, try to adjust everything still not fixed, is it suppose to be like that?
-
Hi Guys, just want to show some more pics, here are some new print that I just did and want to ask some new questions.
The left robot was printed when the machine just assembled, the right one is the new one printed with new settings.
old: speed: 80, temp: 220, slice: 0.2mm, filament: 2.89
new: speed: 50, temp: 210, slice: 0.1mm, filament: 2.85 (more driver belt tension, more extruder tension)
I can see the surface finish and overhang problems are improved, however other problems has become more obvious. the Z scar is worse due to smoother surface, but the biggest problem at the moment is the "wave" looking behind every turning point. it's seems the hot end has been vibrating every time it's changes direction, and that was the reason I try to increase the belt tension.
The following pic shows how bad the wave can get on a smooth finish. Also noticed the right hand lower corner of the object has left up a bit. Not sure thats called warping?
Any one could help please?
-
The warping issue is basically that the plastic contracts as it cools.
Thanks for all the info, sounds like a lot to learn, will keep eye on those things. I am doing a lots of readings around so will have a better idea.
-
Welcome!! Those are pretty nice first prints, well done! But yes, there's always room for improvement.
What temperature are you printing at? To get better overhangs - reducing the droopy bits on the robot - you generally want to print slower, and cooler, and be sure the fan is on.
Where the prints have some gappy parts, that may be due to under-extrusion - not laying down as much plastic as you should. Increasing the temperature might help a bit, as might slowing down a bit. You also need to make sure that you are using the right filament diameter when you slice the object. Do you know the exact diameter of your filament? Cura defaults to 2.89mm I think, but that's rarely the right size - most commercial filaments tend to be 2.85 or even 2.8 in most cases. If that's the case with yours, then you'll be extruding less than you should, because Cura thinks that every mm of plastic that gets fed in is thicker than it really is - and that's how it controls how much gets extruded out of the nozzle.
As you can see from those two statements... there's no one 'right' print setting; you have to adjust for the object you're trying to print. There are competing needs of temperature, speed, and layer height that effect the end quality.
You might also check the tension on your extruder drive spring. The spring should not be fully compressed - on mine, there is about an 11mm length of spring between the body of the extruder and the head of the spring. Check the filament in the bowden tube after a print.... it should have clear teeth marks in it from the drive bolt, but not be chewed up or worn.
The 'normal' settings in Cura are a good starting point, so I'd continue to tweak things around those settings while you get the printer bedded in and understand it better - and get a feel for what sort of settings an object needs. If you have problems, it's tempting to think that the 'High Quality' settings in Cura - slower, thinner layer heights are the solution. And really they aren't. It's not higher quality in the sense of fixing problems, but rather just improving the finish - less obvious layers, and better handling of 'almost horizontal' slopes and curves. Even on 'normal' quality, with 0.2mm layers, you should be getting perfectly good results. If you aren't, then keep posting here and lets try to tweak the hardware and settings until you are.
Well done on getting started though! Those are some pretty nice first prints - you should be pleased!
These prints are pretty good. Difficult to improve.
The robot has many overhang spots and of all of them, only one had the problem (circled). That part of the robot is very difficult to print because it is hanging in mid air when it prints that spot.
Whatever settings you used for the robot were slow enough - especially the antennas on the top - those look great so you must have printed them very slowly (the antennas). I don't think you can make the robot any better than that.
The other issue is more of a slicing issue. When the printer is printing *almost* level surfaces such as the top of a sphere, .2mm slices are more noticeable. This can be improved with .1mm slices. You can probably also double your speed if you slice at .1mm as the plastic will be coming out slower. But don't speed up your print so much that you have less than 10 seconds or so per layer as you will have other issues - especially with overhangs. It's critical that a lower level cool to a solid before adding the next layer. Especially for overhangs.
Next I predict you will have problems with warping when you print large parts. When you do, we will have solutions for you! Good luck.
Ok, First of all, you guys are amazing, did not see friendly forums like this one for ages. Big thanks to both of you.
The first two things I printed out was one of the fan duct and a bowden clamp (showed on picture is not my own), cause the bowden tube keep jumps out.
they came out really good and I am happy with them. the clamp worked good, I would recommend them for new users.
now for the questions, I kept temperature at 220C, you were right, cura's setting for filament is 2.89mm, I double checked the filament roll I got from ultimaker shop. sticker said they are 2.85, so changed that, I think it improved a little.
I will play around with the temperature settings to see whats going to happen, sorry I went to the lazy way that just asking questions around here but I am glad you guys are very helpful.
I think the extruder works fine as I can see little teeth marks on the filament. Checked screw, it was not too tightened, but, after a few hours print, I noticed one nut was loosed in the x-axies blocks, so I would recommend other new users to check around after a few print.
Will try to change the slice hight see what happens.
Could I ask whats the "warping problems" I going to have? only on large prints? so I can keep eye on it.
Thanks for all of you.
-
Hi guys
Just assembled my ultimaker, took me about 15+ hours.
Tried to print some parts and very happy with what it can do. However there are some imperfections with the result, I want to find out whether everyone get it or just my machine. and how to improve.
Do you guys get those bumps or gaps in the layers? I was using Cura with normal quality print settings, then for the forth part I tried increase print speed from 50mm/s to 80mm/s and it worked alright, slightly loose of quality but acceptable.
Anyway, thanks guys
Fixing Pulley Innacuracy
in Third party products & modifications
Posted
Ok, I am waitting.