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Posted · New UM 2+ help

I upgraded from a MonoPrice Maker Ultimate that I had for about two years. I wanted a more stable and care free printer. I finally pulled the trigger and my UM 2+ arrived today. I have spent the last 5 hours trying to get a single successful print. I haven't been able to do it. Nothing will stay attached for more than a few layers tops. Here is what I have done:

  • Leveled the build plate a dozen times 
  • Cleaned it with soap, water and rubbing alcohol many times
  • Tried several test prints included with the printer (probably 12 or so failed prints)
  • Tried glue
  • Tried other files in latest version of Cura with a brim. 
    • Double checked all settings
  • Flipped glass (this got my prints to stick for a couple more layers)

 

I am printing with 2.85 dark gray colorfabb PLA.

 

I am at the point where if I don't get this working soon, I am sending it back.

 

Any thoughts or advice? I have an email out to support, but they are closed for the weekend.

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Posted · New UM 2+ help

In 99% of the cases it is because the printing bed is not correctly leved. The distance between nozzle and glass is too high. If you calibrate with the calibration card or a sheet of paper, then you should feel a good friction of the nozzle already when you move the sheet. Better too much than too little.

 

I also use a glue stick, which I apply to the glass and spread with a wet cloth. This gives me a very thin layer, which is completely sufficient.

 

 

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Posted · New UM 2+ help

I understand that leveling would be the go to. I have leveled beds hundreds of times (on my old printer and now a dozen on this one). I thought the bed may be different than my old printer so I tried leveling it high. Of course nothing stuck. Then I leveled it low and it had the usual problems I leveled it as it should be, with the right amount of friction on the leveling card. 

 

I am getting a perfect first layer. 

 

Do you use the glue even with PLA? I can give that a go later, and I haven't done the wet cloth method. I won't get to it today, so hopefully some other tips will come through that I can test.

 

Oh also, I am really careful to remove the test pla that it spits out at the beginning. That ruined one of my early prints. 

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Posted · New UM 2+ help
1 hour ago, 1nf1n1ty said:

Do you use the glue even with PLA? I can give that a go later, and I haven't done the wet cloth method.

 

Usually, yes, because it's just safer. I've had PLA prints come loose from the glass.

I only put the glue stick 3-4 times over the glass and spread it with a wet cloth. In this case a very thin layer is sufficient and it can withstand many prints. I renew this layer relatively rarely.

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Posted · New UM 2+ help

The glue didn't work. Re-leveled and tried painters tape without luck. Cleaned it with Acetone and got a successful print. I'll try another one tomorrow and see how it does.

 

 

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Posted · New UM 2+ help

I still believe that your nozzle is too far away from the bed and the filament will not be squished enough into the bed.

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Posted · New UM 2+ help

So this is how I leveled it. When doing the second round using the screw nuts, I have the leveling card under the nozzle. I raise the bed using the screw until I feel friction. I then pull the card out and in and out while raising the screw slowly. At some point, moving the card in, pushes the bed down because the card is thicker than the distance from the nozzle head to the bed. I then back it off slowly until the bed no longer gets lowered by pushing the card in. There is lots of friction, and as far as I can see it, it is the minimum gap that I can get using the card as a guide.

 

 

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Posted · New UM 2+ help

Are your cooling fans working from the first layer on? I had similar issues like you described them. I changed the settings for the cooling fans: they start at a print height of 1.5mm and only with a few rpm. The rpm will increase with every layer starting at 1.5mm print height.

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Posted · New UM 2+ help
1 hour ago, 1nf1n1ty said:

I then back it off slowly until the bed no longer gets lowered by pushing the card in.

 

I level my beds in a similar way, but leave the card under the nozzle and turn the screws until I feel a lot of friction. When I now pull out the card I cannot put it again under the nozzle. It is hard to describe, but my first layer is ok and sticks very well. 

 

Try to level nearer to the glass and you will see it helps.

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Posted · New UM 2+ help

So first off, I really appreciate the time and advice. It is really nice to have the help and I am thankful for the effort.

 

I attempted another print this morning with the settings from the successful print last night. It came lose after it got about 3/8 of an inch in height.  I tried the closer leveling as suggested and a thin layer of glue. It was an instant fail. The very first line of the brim didn't stick.

 

Should it really be this difficult? I have about 25 failed prints at this point. I am not a total novice at this as I did all this and more over 2 years of printing with my old printer. I bought the Ultimaker 2+ because I wanted a solid printer that would be a stable workhorse for my printing. I am not getting that and it is very frustrating. I didn't go with the UM3 because I didn't need dual extrusion or the camera or the auto leveling (or so I thought). 

 

I feel like I have to mess around with a printer this much I should have just bought a $500 printer and saved the $2000. 

 

Very frustrating.

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Posted · New UM 2+ help

On the fans question, it is set to 100%. The first layer uses the back fan as expected, then the other two kick in on the second layer.

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Posted · New UM 2+ help

Ok, the settings I talked about were not the ones I'm using at the moment, had older ones in mind. But they are not that different:

Bildschirmfoto vom 2019-10-06 21-18-45.png

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Posted · New UM 2+ help
1 hour ago, 1nf1n1ty said:

 I tried the closer leveling as suggested and a thin layer of glue. It was an instant fail. The very first line of the brim didn't stick.

 

Can you post a photo please, I think then it will be clearer.

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Posted · New UM 2+ help

Here is a picture of the one good print base I had. Also picks of the first output to show PLA flow. Then pictures of the next couple fails. I re-leveled between them.

IMG_3981.jpg

IMG_3987.jpg

IMG_3989.jpg

IMG_3976.jpg

IMG_3978.jpg

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Posted · New UM 2+ help

I always use glue or "3dlack" (basicly hairspray) on the ultimaker 2+ and Ultrimaker 3 we have at work.

On bare glass, even if very clean I have experienced tons of warping with PLA... Since I use an adhesion layer I have no more trouble...

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