MartijnvG

hahaha if you mouse over you can see the date when the picture was taken some things have changed. it is now a lot messier and more photo's on the walls. and yeah. i checked to see if anything unofficial was in view. not saying they are all gone.... or are they

@ian hahahaha, that made me laugh. it's said to hear that the work ethic is so bad there. my day has been cool. we unpacked the new shopbot. then i got back to working on the new user manuals (which can be quite boring). and i've been doing some printing so all and all not a bad day. now up to the next meeting

@Ian, there has been some research http://voxelfab.com/blog/2013/07/is-desktop-3d-printing-safe-will-it-harm-your-health-ultrafine-particle-emissions-and-vapors/ (not really definitive but it is a start) if you think that printing next to your bed is bad for your health, then stop it. if the headaches disappears than it probably was the machine. The thing is not a lot of dedicated research has been done because of the new nature of the technique. If placed in a big enough room with a decent air flow i don't think 3d printing is that bad for you. but placing it next to your bed and possibly not having enough good ventilation might not be such a good idea. Take care of your health! But to be back OT: this is my Ultimaker Corner

have you updated to the latest firmware? there was a bug in the previous versions. the upward movement after triggering the z-stop was not big enough and sometimes it would still be triggered. that would cause the difference in z-stage calibration.

I think adding the chamfer at the bottom is not such a good idea, during a print it might help but when it cools down it will create a lip on the pla which will cause it to jam. here at HQ we tested with ceramic but the pla just stuck to the inside walls and after cooling down we had no luck of getting it started again. a new PFTE part will always increase the improvement of the machine. Because the deformation takes place after a +80 hours of printing (@210c) Here you can see the machine we use to test all the different variations of the PTFE part... (don't pay attention to me on the photo , it was the best photo i could find cause the machine is half appart for the next series of tests atm) and then this one to measure the amount of force needed to just push it through the nozzle.

no comment?

it should be fine. according to david. Give me a heads up if it doesn't work. i'll try to get him to look at it.

so i had a talk with David. it seems that in the Ultimaker 2 there is a bug that overrules G92, he thought he fixed it but that only seemed to be the case in the Ultimaker Original firmware. so i'll ask him to fix it in the next firmware release for the UM2

if you know the exact hight of the plate you can write some start code that will firstly move the head down then set that hight as the home position and then everything else will start from there. you can move the z-stage by using G1 Zxx.x and then using G92 Z0.0 to set that as zero. please do keep your finger near the off switch. my G-code is a little rusty you can check here: http://reprap.org/wiki/G-code

aaww Nallath ur such a tease

we probably will, or at least make a video of it so more people can watch it afterwards

Hi Flashp0int, Retraction is a tricky thing. especially when it happens a lot like you said. This is because (the way cura works now), is that it retracts and primes the same amount. But because there is still a little oozing, it takes a little bit more material to get the material flow back up to the same amount it was before the retraction happened. as well as the material that is 'lost/extruded' as the nozzle pressure gets primed again. So if there are a lot of retractions in a row you keep missing that little bit that oozed out of the nozzle together with the bit that is lost while priming. In a normal print, the time it takes to print a layer gives the nozzle time to compensate and you won't really notice it. but when stress testing like this it can definitely occur. Slowing down the printing time and the retraction distance/speed (30mm/s seems a bit high) might provide a solution here. so play around with these settings. We are trying to come up with a clever way to incorporate it into Cura in the future, but it will take a while to come up with a proper algorithm for it. so, no real solution, but hopefully a little more understanding about the problem

You can check here for the latest http://software.ultimaker.com/. Which is 14.07

The evidence points towards it. See the brown coloring on the roof, this is an indication that the material (presumably PLA has been burning up and degradin in the nozzle). i have yet to see that on ABS as the nozzle just can't reach the needed temperatures to start degrading ABS without meddling in the firmware.

it looks like some layer shifting is happening. this might be because of a loose pulley. check if they are all still tightened

It also needs to provide a seal so the material won't flow anywhere else except up or down.

hi guy's i'm intrigued by this discussion and the difference in the layers touching and not touching I think i can partially explain why in the cube middle part gives more problems than the sides. The difference in temperature has been shown to be very subjective to change by Mnis in his previous post Because the head slows down at the corners in the red circles the material has more time to take in heat energy, then when the head speeds up again in the green corners and the material gets pushed through faster it has less time to take in the energy needed to be fluid enough to prevent under extrusion. This has been a sensitive spot in the Ultimaker 2 hot-end. Because the area where the material is being heated is fairly small these temperature drops are more likely to occur then in the Ultimaker original where the heating zone is larger. (+/- 1 cm Larger with a lot more mass so it won't fluctuate as much as the original) But this also results in the fact that the ultimaker 2 can print more detailed/fine models than the Original where to much material just leaks out and its harder to control the constant flow. Another thing that is a result of the different melting chamber height/mass is that the temperature input needed to get the PLA up to an certain temperature is different on both machines, and printing on 210c on an UM2 might result in the same extrusion temp as 190c on an UMO. So, printing a little slower might help the material to get up to temp and might fuse the layers together better. Making sure the extruder drive is set at the correct tension is always a good place to start with under extrusion. (my personal favorite is placing the indicator around the second notch). as well as checking if the knurled wheel is tightly secured. Can you also show me a picture of the pattern embedded in the PLA after it has been through the extruder? As for the patterns in the red printed squares, i think 3Dmaker4U gave a very plausible reason for the patterns, The layers releasing in the top left corner might be because of the uneven heat distribution, it might be an slightly warped glass plate and small differences can show up only in large prints. I'm looking forward to see what people think about my little talk and i hope it helped a little

i might drop in tomorrow if you guys are open i haven't recieved my file yet either though. so i can come and pick it up.

Hi Korneel What city are you from? A good idea might also be to visit one of the Ulti-evenings or visiting a Fablab in your neighborhood. Also, read through this post in the forum. it might help you with some basic starter errors. http://umforum.ultimaker.com/index.php?/topic/6574-a-visual-ultimaker-troubleshooting-guide/

i have sent my request as well

i'll probably be there!

Thank you David..... I feel honored being posted here. never a dull moment at Ultimaker HQ