rickyg32

Hey Slashee_the_Cow Yes that is exactly what I was doing. Run it hot for the initial layer and then drop it to 195 for the balance of the print and it works well. GregValiant I wanted to update you on my testing. I ran the part a few times doing so tests. First I ran it at 100% Flow and 195c as the temp. I got the results you saw in the original post. Ick. I then ran it at 100% Flow and 220c as temp. I got better results, but not by much. So temp had no affect on the results. I then ran it at 110 flow and 195C as the temp. I much better results, but not perfect. I then ran the print again at 120% flow and 195c and it was perfect. I then ran it again on a second machine to see if it was machine specific and the results where the same. Perfect. So the profile has now been backed up with those settings. Thanks very much for your assistance. I can now get my project started except now I need a new battery in my UPS. Power went out for a second and the print went off. Always a challenge. lol

Thank you for your insights. I have been checking other forums for information on this particular material. Most people print at around 190 but I found I could never get the first layer down till I upped the temp. The other thing people have reported is having to up the flow as much as 20% to get a good print. Seems the extruder would starve in some way. So I printed a few parts at 110% flow and had no issues with them. I might try this part again with the higher flow and see if that makes a difference. I agree it's filament starvation of some sort. Will let you know. Thanks again.

ok I finally got a picture of the issue with the 4.13.1 you suggested. I think this is a tuning issue just not sure what to look at. IT's like it under extrudes after a hole. CE3PRO_Rhein-Flugzeugbau Fanjet 600 Servos Landing Gear Insert.3mf

Hey Greg I installed the 4.13.1 version and wow the print was bordering on perfect. There is one weird issue that I hope to get a photo of and share. But this issue I suspect is tunable and minor in nature. So thank you ever so much.

Awesome thank you. I thought I was doing something wrong. I can install the older version. Cheers

Hey all. Sorry I don't have a photo at the moment. Was just thinking back to a part I printed this morning and sanded. I thought hey whats the cause of this defect. So here is what I have seen. I am printing items that are a bit thin. 12mm or less in thickness. The part has a horizontal channel for a piece of carbon fiber to be insert. For some reason on the surface of the part there is a bulge of sorts. This happens all the time for me and I am unsure what setting helps to correct that. I know sand paper does lol. Anyway I thought I would ask. Latest cura version on a direct drive ender 3. Printing Polymaker Pre Foamed LW PLA CE3PRO_Rhein-Flugzeugbau Fanjet 600 Elevator.3mf

wow bang that doesn't sound good. Never seen the spool move like you describe. wow. A for the photo yes its the same pla. Something in the transition from the flat to the other surface causes the line. No idea what it is.

So guys first thanks for jumping in on the subject I really appreciate it. I have a theory. I am using a direct drive Sprite hot end. Love it. Works great up until now. I sat in front of the printer and watched for a few minutes and observed something odd. You guys I think are in the right ballpark. I think lol. Anyway the Polymaker Pre Foamed PLA comes on a cardboard spool and they have a lot higher drag on the spool holder. I suspect 2 possible problems. First that the sprite isn't pulling hard enough that the filament gets pulled back by the weight of the spool. I have noticed how it can suddenly rock backwards when the print head moves. For instance on the part I was watching. It was printing a support at the front left corner of the build plate then moved all the way to the back right to print there. The roll of filament suddenly rolled back with a bang. I imagine that bang was the filament rolling back onto the spool and reaching the end of it's freedom due to the extruder holding the filament...who knows how much filament was pulled out due to that but even a mm or 2 can screw with the print quality. IT may take some time for the machine to catch up. I cranked the pressure up on the extruder to hold it tighter. So far the printing is much better. I have also ordered a spool holder with bearings in it to help reduce the tension on the filament. But apart from those two ideas. I am not sure what other options there are. I have one other issue I can't explain. If you see the photos attached. You can clearly see that there is a line being created where the print transitions from a flat surface to something else. I am at a lose to know what causes this or what setting needs to be changed. Anyway thanks everyone I will let you know how the test goes.

I agree I level the bed before any major printing. Which I had done in this instance. Also if it was a level issue why would it print fine when the rear part is removed. It's strange.

Hey there thanks for looking into this. I confess I am stumped. So get this I printed the same part in the same location but this time I removed the rear part and it printed just fine. um weird lol I then printed a part that ran the whole length of the bed. I printed the first 10mm or so and got an under extrusion at the front end just like the photos I posted. I am running the same part on an angle and will see if it has something to do with creeping up on the edge for the bed. I will try the scaled up cube as well. I upped my Z hop, it shouldn't be that low as I have had print strikes in the past. AS for Gyroid. It should be Cubic Subdivision. I had sliced a part before had that requires Gyroid and it got left behind. User error. The tree support...ya doh that was my stupidity. I don't typically print two objects at a time and so didn't take the support into account. A learning opportunity as my boss use to say. From a machine point of view I can't think of anything that would cause under extrusion only if your near the edge of the bed. It's a direct drive printer and well the print head doesn't do anything different anywhere it is unless it's commanded to do so. Z height could affect it by perhaps binding the filament but that's in a bowden machine. The only positional affect I can see on the machine is the slapping of the filament roll. Carboard rolls suck as they have way more drag on them. So I have ordered a bearing roll holder. But apart from that I see nothing on the machine that would cause it and why didn't it when I printed the same part on it's own. Weird.

This is Polymaker Pre Foamed LW PLA. Attached is the file you requested. CE3PRO_Rhein-Flugzeugbau Fanjet 600 Canopy Base B.3mf

Hey all Happy New Year. So last night or over night I was printing an 18 hour print. Normal thing for me. However this went south in a strange way. I had two parts on the bed. The parts filled most of the bed, two basically flat parts. The part at the rear printed perfect. The part at the front failed. It seem to randomly under extrude. As if there was a nozzle jam. But if there was a jam it never affected the second part in any way. The first 12mm of the print was a disaster, the remainder seem to have a layer of serious under extrusion every 12 mm...yet the second object was fine. I am stumped. Cura 5.6.0 Ender 3 with direct drive sprite extruder.

So it looks like the biggest issue was mechanical in nature. I think I had a wheel or two a bit to tight. However I am left with one issue and I am convinced it's Slicer related. If you see the hole at the top of the top of the lower hole there is a line that is showing up where the holes stop and start. Not sure what causes that.

Hey out there. Any thoughts on what would cause these lines. The pen mark is there to tell me at what point I tighten then Y Axis. I am puzzled. I assume it's slop in the axis. But not sure. It appears to repeat every 12mm or so. I am stumped.

Well dang that worked. Thank you. IT appears that it must have something to do with the top and bottom function. Once I adjusted like you it worked great. Thanks ever so much.