[UM3 Extended wont print first layer]

So, as long as I keep it small and quick, it seems to work fine. this is a 9 mm hex nut I just printed. print was perfect. I was able to thread it onto a 9 mm bolt I had printed at home.

[UM3 Extended wont print first layer]

Here is a rendering of the entire model I am trying to build. I designed it using Fusion 360. We had an urgent need for a Non-metallic Indexed Turntable for testing a north finding assembly. I designed the entire model to be 3D printed, including the assembly screw. I originally started printing the base on the UM3. After a week of fails I had a friend print the base on his TAZ6, as it was too large for my Robox.

After working on the UM3, making all of the adjustments and calibrations and changing the second core to the BB 0.4 I started working on printing the rotating platter. The platter is smaller and has fewer features, so I thought maybe it would print. It too is really a little too large for my Robox, although I was able to print it successfully. I was hoping to get a cleaner print out of the UM3. Compared to a number of other models I have printed, this should really be an easy print. It takes a long time due to the size, but it is not complicated.

[UM3 Extended wont print first layer]

I started printing with a roll of Hatchbox Black PETG. I had previously used an entire roll of the Hatchbox Black PETG for several other prints with no problems. I also use Hatchbox on my other printer and have always had good results. When I started having failures on this machine the roll of Hatchbox was new; however, since I had seen it jam several  times I decided to try a different brand of material. I had a brand new, un-opened spool of eSun Solid Silver PETG, so I loaded that to make sure it was not the material. I have used eSun material (ABS and PETG) on this machine and my other machine with good results in the past. I also provided the roll of Hatchbox PETG to my friend who was able to use it to print the largest part of this model on his TAZ 6 with no problems.

I'm not sure why the silicone pad is torn, I noticed that as well. It appears to be seated correctly and no material is getting up inside the core. Some material may have gotten in there at some point but i am not sure when.

I think it just LOOKED like it was lower. Looking closer at the failed print, it looks like the in-fill may have failed at some point and it just wasn't adhering. It's hard to tell after the fact, but I have never seen the sort of infill pattern that this print used. The Cura Default appears to be "Triangles".

I have not tried printing this model with anything besides PETG. The UM3 is used at my place of business. At work I do not have a dehumidifier so storage and use of most materials is a problem.  For this machine I had started printing exclusively with PETG because it is less sensitive to humidity and has less of a tendency to warp than ABS. PLA is not suitable for higher temperatures (I had a print damaged when left in the car on a hot day), and Nylon is not suitable for this print. While I have a small amount of each of those materials, my last material purchase was exclusively PETG (2 rolls of Black, 2 rolls of Silver and a roll of white). In order to test this print using PLA I would need to buy another roll. Unfortunately the UM3 material is not compatible with my other printer, as it uses 1.75 mm filament.

I have printed this very same model on my other machine, at home. The other printer is a CEL-Robox. The model will just fit on the print bed. It extends to the very edge. I was able to get a very good print using PETG on that machine. The only problem was slight warping of one edge where it was setting next to the metal hold-down clip for the print bed. I assume the metal clip caused that spot to cool too quickly, causing the slight warp. Everything else about the print was perfect.

[UM3 Extended wont print first layer]

Can someone please explain this? Once again the print failed. It ran cleanly for over 6 hours yesterday. When I went home at 5:00pm last night the print looked perfect and was still running smoothly. When I arrived this morning at 6:30 am, the picture below is what I found. The printer was still running, there was about an hour left on the print time. I was able to abort the print through the menu, so there was no evidence of a system failure. However, after I let it cool for about 15 minutes and returned to the printer, it showed the error in the second picture.

I looked at the print head prior to shutting down, and it almost appeared that the head was lower than the height of the print and was digging a hole in the print. The print was a solid plate, printed at 80% infill. No support material was required and very few holes (2) where in the plate.

I just can't figure out why this thing can't print.

[UM3 Extended wont print first layer]

By the way, Yes I have seen "Chew Marks" on the filament after some of the fails. I have had several incidents of the Printhead jamming during the print. After each incident, I have cleaned material out and I have run the Clean Printhead routine. Each time that I reload the material I allow a large amount of material to flow from the head to ensure there are no further problems.  

In the case where I managed to print up to layer 4 the material just stopped flowing and again I found that it was jammed.

I have tried both print cores, and even moved from extruder 1 to extruder 2 to ensure there was not an extruder problem, like maybe it was slipping or something. It was after moving to extruder 2 that I got the Temp Sensor error.

I have sense moved back to using extruder 1, I removed the hot end from slot 2 and installed the A04 BB head. The printer is printing Layer 2 of the current print and I have not seen an issue.

PS: I also changed material from Black PETG to Grey PETG (Brand new role) just to ensure there was not a material problem. even the brand was different.

[UM3 Extended wont print first layer]

Sorry for the delay in responding. Yesterday was a busy day and I had no time to deal with the 3D printer.

Today I cleaned up the printer and put the A4 BB head in the Print Head 2 Slot. I reran the Heat Sensor test and got all passes. I loaded the PETG material into Material 1.

Below is a picture of the print nozzles prior to the change to the BB head.

I went back to the CPE profile and set the Temp to 240C and the Bed Temp to 80, print speed is 60. I'm printing at .1 layer height with 80% infill.

I restarted the print. The model is currently printing and the outer Perimeter is looking good. I will continue to monitor and see how this one does.

[UM3 Extended wont print first layer]

some other suggestions you could try:

Lower the model a little in -Z to be sure the bottom of your model is really flat.

Check if the x and y printhead axis are firmly seated in the slider blocks, https://ultimaker.com/en/community/39801-um3-critical-failure-x-x

https://ultimaker.com/en/community/49933-um3-x-axis-moves

Thanks for the suggestion.

In my early attempts to print this model (Day 1) I had exactly that problem. for some reason the smaller holes in the base had a "rim" around them that stood out about .1mm from the rest of the base. These were holding the majority of the flat base up off the plate just enough to cause it to not print correctly. I was able to go into the model and correct the issue. By rotating the print plate in Cura, it appears that the entire base is now in contact with the print surface.

I have actually gotten the updated model to print up to the 4th layer before failing, so I don't think that is the problem any more. In fact I gave the STL file to a friend of my and he was able to print it successfully using his TAZ 6 printer with no problems.

[UM3 Extended wont print first layer]

Here is an intermediate picture showing some of the features. there is a recessed or countersunk area in the middle. As you can see it put down support material, as expected. There is one anomaly in the flat area, sort of a blob in one of the tracks. At the time I was hopeful that this would not cause a problem. I din't take any more pictures after this as I was starting to have good confidence that the print was going to be successful. I walked away to take care of some other things and when I returned I found the mess above.

[UM3 Extended wont print first layer]

I was pretty frustrated last night, so I didn't post the pictures, but once again the print failed. As you can see from the first picture, it started out looking very good. All of the features were placed on the bed with good adhesion. Even in the second picture you can see that large areas of the print, at least in the beginning, printed very smooth with good adhesion. I was feeling pretty confidant at that point, and then a short time later things went south, as you can see from the second picture.

[UM3 Extended wont print first layer]

I tried some of the solutions suggested in other posts concerning the temp sensor failure. After pulling connectors, cleaning contacts, cycling power and various other clean-up options I reran the temp sensor test and got all passes.

I have restarted the print and It currently looks good; although, it hasn't been running long. all of the major features (hole and perimeter placement) seems to be fairly clean. I took several pictures and will post them later. There were a lot of strings spread between the features, so I did a little clean-up using tweezers. I thought this might help prevent build-up on the head and maybe reduce some of the globs of print material throughout the print. We'll see if this one is successful, 35 hours is a long time based on the problems I have been seeing.

Robert

[UM3 Extended wont print first layer]

SandervG:

As I stated in the previous posts, I have cleaned the bed multiple times, With alcohol and with soap and water. this last attempt was printing on Blue Painters tape, after doing a full calibration and bed leveling. I got good adhesion and the print was successful through the 4th layer, at which time I received the "Printcore in Head Slot 1 taking too long to heat up" error.

Yes, the silicone pad is still in place and yes, the fan is still working. I had recently cleaned out the fan as I noticed it was making some noise. There were some filament strings in the fan at that time but it is currently working and not making any noise.

The taking too long error has only occurred once.

I do not have any pictures of the previous first layers. I do have the 4 layers that just failed but I don't believe a picture of this would reveal any pertinent information concerning the current failure.

I just ran the heat sensor check under the maintenance menu. I got a failure on 2 = 14 degrees. I guess I will contact my reseller to see if it is stilled covered by warranty.

Thanks for the responses.

Robert

[UM3 Extended wont print first layer]

There is a core in slot 1. As I said, the print made it through about 4 layers. In fact, it was looking quite good. The print head then parked itself in the top left corner and the error was displayed. Now I can't even bring up the menu or anything. I will be forced to power-off and restart a 35 hour print, and hope that whatever I do fixes the current problem and doesn't cause any new issues.

Arrrgh!

Thanks for the response though. I will try the items you suggested.

Robert

[UM3 Extended wont print first layer]

I recalibrated the bed level, both manually and Auto Level, cleaned the plate, put tape on the plate, did a hot pull and a cold pull, cleaned the bowden tube and the extruder and then restarted the print. It finally got through the first layer. There were a few minor flaws and a couple of clumps of melted material but all in all it looked pretty good. It continued to print through about three or four layers and then popped up with a  "Printcore in Head Slot 1 taking too long to heat up" error and the print stalled.  I'M NOT EVEN USING Slot 1. I am using slot 2. Why is it trying to heat the core in slot 1?

This has been the print from hell!!

[UM3 Extended wont print first layer]

I have a UM 3+ Extended that I have been using since mid December. I have successfully printed PLA, ABS, Nylon and PETG. Monday I started trying to print a large flat object (with some mounting holes in it). I am printing using PETG. As in previous successful prints I started with the CPE profile and made some minor modifications to temperature, flow rate and speed to derive a profile for PETG. With this print I have not been able to get it past the first layer. I continually have problems with material not sticking to the bed, material jamming in Bowden Tube (right at the hot end) and any number of other problems. With previous prints the material stuck so well I had trouble getting it off the bed. This should be a very simple print but I have not been able to figure out what is going wrong. I have run the manual leveling, and auto leveling several times. I have tried printing straight on the glass, on blue painters tape and on glass with glue stick. What happens more time than not is that the material sticks to the nozzle until it build up to a point that it screws up the rest of the print. If I could get it past the first layer it would probably print OK, but just can't seem to solve the problem.

Would anyone have any experience printing PETG on the Ultimaker that might have some suggestions?

I also have a CEL Robox machine that prints PETG beautifully. Unfortunately this print is about 1 1/2 inches too large for that machine.

Robert

[Prusa i3 MK2(s) vs. Ultimaker II+ or Ultimaker 3]

"To summarise my thinking here. If you have say €1200-2500 lying around and want the best printer that money can give, buy an UM2 or UM2+, used or new depending on availability and preference. If you have €3600 lying around and want something even better, I think it will be hard to beat an UM3, although I would take my time and check out the competition that is in that price range as well. But I doubt there is any serious alternative."

At this point in the technology I don't think price is a fair comparison for printers. In my experience it is not appropriate to say the Prusa i3 is not nearly as good as the UM3 just because it is less expensive.

I currently own a UM3 Extended (>$4,500) and a CEL-Robox (<$1,400 with dual material head) and am considering the Prusa i3 MK2s with Multi-material upgrade (~$1,000). The only advantage the UM3 has is print size and Cura will not even let me use the full print area advertised for the UM3. For most prints the Robox prints better quality with much less hassle than the UM3. This is especially true for ABS, as I get less warp with the Robox. PETG is considered one of the most popular 3D print materials and the UM3 does not even have a print profile for PETG. The Robox has print profiles for all popular materials and many specialty materials. Based on discussions with a friend who owns a Pursa, it also has print profiles for a large variety of materials, including PETG. My Robox is 3 months older than the UM3 but has ~1000 print hours (Based on internal counter for two separate heads). The UM3 has less than 200 print hours because it is too much trouble to set up.

I have spent the last 2 days trying to print a simple flat plate on the UM3, using PETG, and can't get past the first layer. If it were 1 1/2 inches smaller, I could print it on my Robox and be done with it.

In my experience there is no such thing as out-of-the-box printing. If you are not "willing to get your hands dirty", 3D printing might not be for you.