[SOLVED] Nozzle drag and rough perimeters on bottom layers

[Ben]

I'm a rather new user of S3D and my new printer. As the last one died some time ago I haven't been able to test this on another machine, but it seems to be an issue of S3D as Cura doesn't produce this problem.

As I'm printing the bottom layers, the nozzle seems to be over extruding and keeps dragging material off the surface - which is then deposited on the outer perimeter. example

...

And I hit "Submit" instead of "Preview" ...

Further Information:
Printer: CR-10S
First Layer Height: tested 100%, 120%, 150% (funny thing is: 100% seems to result in the least drag. I don't think I understand this setting correctly)
Extrusion Multiplier: 0.85 (tried with 0.90 as well)

The results seem to vary depending on the filament used. I get the worst results with FormFutura HD Glass. Worst ... not on the perimeter, but on the "shaved" material. second example

I'm not sure it's the extruded amount as I'm tuning my current print and adjusting the flow setting while printing. I'm at 92% currently and it's shaving like before. But then it's been half a year since I've started printing and what do I know ...

I'm in pain as well, as I've taken that last pic from an unlucky position and my beard got caught a bit in my Y belt. The belt is ok if you are worried ...

[Geek2Nurse]

I'm a bit of a n00b myself, but thought I'd at least try...

The first layer height setting is an exception to your overall print resolution. So if your overall print layer setting is set to 0.2mm, for example, and your first layer height is 150%, then the first layer will print at 0.3mm. (I had to pick easy math, since I haven't finished my coffee yet.) So I don't think that's where your problem is. I'm wondering if it might not be a heat issue, since there's some stringing going on too. Maybe try lowering your nozzle temp a little?

Sorry about your beard, that's one printing issue I don't have to worry about!

Oh, and just a tip -- post a factory file QUICK, before people start yelling at you. (Of course then they'll just ignore you, but at least you won't get yelled at first thing in the morning!)

[Ben]

Thank you for your reply!

I'm a bit of a n00b myself, but thought I'd at least try...

The first layer height setting is an exception to your overall print resolution. So if your overall print layer setting is set to 0.2mm, for example, and your first layer height is 150%, then the first layer will print at 0.3mm. (I had to pick easy math, since I haven't finished my coffee yet.) So I don't think that's where your problem is.

I don't think so as well. 150% should be ok as PETG doesn't need to be squished down.

I'm wondering if it might not be a heat issue, since there's some stringing going on too. Maybe try lowering your nozzle temp a little?

I've played with temperatures as well, but it doesn't seem to be much of a difference. Currently I'm printing PETG at 225°C (that's the lowest I'd go for that brand) and it looks horrible (only the bottom layers of course ...). The printer is new and maybe the heater is going bonkers. I have to check this.

Sorry about your beard, that's one printing issue I don't have to worry about!

Well, nobody forced me to grow one. My wife doesn't allow me to shave it off, but she didn't force me to grow it either ... I should trim it though. Maybe the printer could help

Oh, and just a tip -- post a factory file QUICK, before people start yelling at you. (Of course then they'll just ignore you, but at least you won't get yelled at first thing in the morning!)

Thank you, I'll do! Nobody wants to be yelled at ...

[Ben]

Just out of curiosity ... will the "wait one to two days until your post is published" situation in this forum ever change when I've proven to be one of the good guys? That's kind of ... well ... If I wanted to use my 14 days return option I should be efficient regarding questions in this forum

I think I'll stick with reddit...

...

Edit - sure, now it's posted instantly

[Ben]

I've managed to fix it, I have no clue what exactly has been causing it.

I went kind of frustrated and changed the nozzle (wanted to install the hardened steel e3d anyways), had to completely level the bed due to the different nozzle length, leveled the X axis (I have the dual Z version, but sometimes the axis shifts a bit) and I extended the Z offset even more. Together with the excellent bed adhesive I've brewed (sugar syrup...) I've managed to print that little monster! That's by far the best benchy I've ever created. And that's only a .2 resolution. I'm happy

Thank you!

[Funknug]

print at 258c

[Ben]

print at 258c

Why? That's not remotely the issue. Besides, it was solved in January. And it happened with PLA as well. Why the specific, strange number?