jcoutts

How much are you asking for it ?

So if material is drooping out of the nozzle you could have the temperature too high so the plastic is running quite a bit. Also make sure you have retraction turned on in your print settings, that causes the plastic to be pulled back. I would try turning down the temperature a touch. As for the short belt issue, there are two stepper motors that control the x and y directions of the print head. Sometimes those motors can move up a bit causing the short belts (look where the stepper motors are, they are the pully belts attached to the stepper motor) to become loose. This makes slip, which can cause the infil lines not to touch the outer wall lines. The solution is to undo the screws slightly on the side of your ultimaker and push the stepper motors down by hand, then tighten up the screws again't, while pushing down the stepper motors. I suggest look at the visual ultimaker trouble guide (google it) It explain this process better. you will find infill not touching wall as one of the problems.

so my friends are setting up a print center, they had purchased a MB 5th gen, UM2 extended and a Robo3D. I told them not to buy the MB 5th, gen but they decided to anyways. Well 4 months down the road, the MB5th gen doesn't work and has been nothing but problems, the Robo3D is working but the quality isn't the best, where as the UM2 extended in their words is "killing it" in terms of 3d print quality. So I have used alot of different printers, I like the UM2, mainly because its extremely easy to service and the software is great. plus the quality and speed is top class.

to clarify I would try a cool head lift time of around 10 seconds, see if that helps. Its under the advanced tab

You can also trying printing at a slightly lower temperature, that might make it better.

I had a Similiar issue, First make sure your fans are actually spinning when printing. Second if they are, you need to try a cool head lift, basically this usually happens when the plastic hasn't been given enough time to cool before trying to print the next layer. Also It looks like you may need to tighten your short belts, as your infil is not touching the sides properly on that print.

Hi Guys, Just wanted to share with everyone an update on project we have been working on. Here is the new hand! I have attached a video that shows some of the function of the new hand. Hope you enjoy it! If you want more pictures and some info on what we are doing you can check out www.victoriahandproject.com

I have the same Issue. There was another post about this about a week ago where the fellow had a good video. He had to send his Ultimaker back.

Interesting I am having the same Issue. I will try and reload the firmware and maybe try deleting the card information.

Also I find gray tends to be the most likely to underextrude of the colors I have tried from UM. Plus .25 is a pretty large layer height, so I would try decreasing the layer height for your next print. Specially with gray.

No we are not, however its been really neat to see the terrific job you guys have been doing. Helping people is the name of the game and we hope that we will be able to participate in some form or another.

The hand is purely mechanical, It is used with a shoulder harness which is pretty standard for body actuated prosthetics.

Hey Everyone, Just thought I would take some time to share with you a newly designed 3d Printed prosthetic that our University has been working on. The prosthetic is called Victoria, after where it is being developed. The prosthetic will eventually be released as an open source hand available for people to modify as they see fit. Its still being developed, but we feel we have it in a state for now where we can start demonstrating it and seeing what people think. Hope you like it!

I understand, but I have had around 6 prints fail in the exact same spot. Its more just the first spot where it skips. Also I know the spool issue, however the spools are quite new with only around 30% of the spool being used so far. Its definitely an issue with the Z axis or the encoder, I just don't know if there is anything I can do to try and fix the issue

Ok I think its fixed, didn't know my album was private

Oh sorry, Didn't even know that was possible, I'll change that now

Hi Guys, So where I work we have 4 UM2's and one of the UM is having a consistent skip problem. It basicaly makes the parts unusable. Just wondering if anyone has had this issue and if so what have you done to fix it. I have also emailed UM help, but have probably a week or two till they get back to me. Thanks in advanced.

Just as a note, I had a teflon piece that looked exactly like yours, and I actually ended up using a deburing tool to ever so slightly cut off that burnt ring. Then I reassembled the extrude head and now it is working fine. Don't know if thats worth a shot or if you just went for another one.

It looks like my Ultimaker is back up and running, Although I ended up cutting off that black ring that was on my teflon piece. The other thing I did was to get a very small drill and poke it through the nozzle tip. I always could see light at the other end, but after the drill, the light was much clearer with a bigger hole.

Hey, First your Bowden Tube is probably stuck because the expanded plastic is stuck in the teflon piece, If you heat the nozzle up to 220/260, you should be able to pull the tube up. Go to maintanence - advanced - and heat up nozzle Second, If your plastic is clogged, before taking it apart, I would try the atomic method. Just google atomic method ultimaker. Hope that helps a bit

Thansk a lot. I cleaned it out the best I could and cleaned the teflon piece, Hopefully that fixes it a bit. Did you end up getting rid of that that black gunk that was stuck in your tip?

Ok I'll try that, hopefully I can get it clean, I might try a deburing tool, too

Should I soak the tip in acetone, also is there a way to clean that black ring from the teflon, because it seems attached

These are the best pictures I could get, sorry I am using a cellphone camera. Also it looks like the ID of the teflon piece is warped and is slightly oval

Also here is what the actual extrude head looks like. It was suprising to see so much gunk on the bottom. But as for the inside of the actual tip, I can see straight through IE a tiny hole of light, but there is a lot of dark around the edges. Is that normal, or should I clean it? Thanks, Josh