First layer question (Ultimaker Original)

[LePaul 323]

All calibrated on the bed, printing at 215C

FIrst layer seems to develop a "booger" and drags it around (see background)

Notice how this started, first layer seemed to dot away on top? Ideas? Just blue tape being what it is? Rest went fine

 

[LePaul 323]

I'm also noticing the "dotted line" , so wondering if the retraction isn't enough or...something?

I have it at the defaults for High Quality printer, lowered the temp to 212 a bit ago once the brim was done.

Note top, going from right to left

 

[zoev89 73]

The vertical dotted line is a in model travel move. No retraction is caried out. I don't know if you can influence this in expert mode. Since it is done in the infill area not much harm is done. It is quicker to not retract so that is likely the idea behind it.

I don't know what the problem is with the first layer fotoos. The thing that I see is a flow that did not stabelize in the beginning. Correct me if I am wrong..

[Dim3nsioneer 557]

The non-continuous line on the outside of the brim is just an effect from the unfinished priming at the beginning. As soon as the priming leads to a steady material flow the brim looks ok. It will not affect the print quality if the major part of the brim is printed correctly.

However, if you want to get rid of it, increase the amount of the pre-print-extrusion in your start.gcode.

The dotted lines inside the sparse infill are indeed from combing moves. If you loose too much filament with them and get underextrusion following such combing moves, deactivate it in the expert settings or use the RetractWhileCombing plugin. Printing cooler and moving faster (travel speed) reduces the effect.

 

[LePaul 323]

Thanks guys, I appreciate your feedback.

The print came out OK, I am printing in my (unheated) basement and the temperature stays about 55F I've found printing under 200C doesn't go very well, so 210 seems to be the happy number.

 

[printerfan 5]

Lepaul I print in my basement as well with the same temperature conditions. Having similar issues except I have to put my ultimaker original at 220 degrees to properly extrude PLA

[LePaul 323]

You may be on to something, I keep getting that first layer under extrusion since I tried printing at a cooler (210) temp.

Thankfully printing with brim fixes most of that, by the end of the first pass things are flowing well Its the first few seconds that seem to lack. Removing the brim after really stinks, I have to remove the build plate from the machine and pry like crazy to get the part removed. I certainly have adhesion! I just wish I could remove the part a whole lot easier!

Maybe I'll up the temp in Cura then after the first passes go OK, lower it manually.

 

[peggyb 171]

you have an Ultimaker Original, so then it is easy to start a print like this:

preheat pla

when it reaches 200 degrees you can start to turn the feeder wheel on the back by hand and let the pla flow.

then start your print, grab the string that leaves the nozzle.

this way you always start with a full printhead.

 

[LePaul 323]

you have an Ultimaker Original, so then it is easy to start a print like this:

preheat pla

when it reaches 200 degrees you can start to turn the feeder wheel on the back by hand and let the pla flow.

then start your print, grab the string that leaves the nozzle.

this way you always start with a full printhead.

 

Well true, it does flow, I started the print and the first layer does go on better

 

[amedee 349]

If you do not need a brim for adhesion, don't use one

But instead increase the size of the skirt in the expert setting, so that the head is properly primed before starting the object.

Also I changed my start gcode to extrude a bit more (but I always start to prime manually as Peggy explained)