Over / Under Feeding

[RocketMagnet]

I was printing out a new Layer Blower and was getting a very poor quality print, really horrible actually (for the first time).

It was just on one of the side lugs the other was nowhere near as bad so initially I thought it was a levelling issue but rotating the model
and the mess was in the same place. So this ruled out physical setup (I had just replaced my hot end adaptor) which made me think this in the first place.

I had just upped my current to my stepper motor so this was something else I'd added as a factor but I was forced to as it was underfeeding at 160 (now at 170)

Then assumed it must be how it was sliced and tool paths etc, but I've printed this item in the past with no issues. So I experimented with various settings in slicer
but it was always the same.

So it looked like over extrusion which only really manifested itself mainly in one location due to tool pathing.
So after much testing and tweeking I checked the obvious.. yep my filament was 1.90 and not 1.70 DUH!, changing it to 1.90 in repetier/Slicer fixed it.

Shows how important it is to check the absolute basics when you get printing issues and how easy it is to overcomplicate things....

[Eaglezsoar]

I was printing out a new Layer Blower and was getting a very poor quality print, really horrible actually (for the first time).

20150131_105205.jpg

It was just on one of the side lugs the other was nowhere near as bad so initially I thought it was a levelling issue but rotating the model
and the mess was in the same place. So this ruled out physical setup (I had just replaced my hot end adaptor) which made me think this in the first place.

I had just upped my current to my stepper motor so this was something else I'd added as a factor but I was forced to as it was underfeeding at 160 (now at 170)

Then assumed it must be how it was sliced and tool paths etc, but I've printed this item in the past with no issues. So I experimented with various settings in slicer
but it was always the same.

So it looked like over extrusion which only really manifested itself mainly in one location due to tool pathing.
So after much testing and tweeking I checked the obvious.. yep my filament was 1.90 and not 1.70 DUH!, changing it to 1.90 in repetier/Slicer fixed it.

Shows how important it is to check the absolute basics when you get printing issues and how easy it is to overcomplicate things....

Thanks for pointing out that checking the small things is also important. The filament should always be tested at random points before using, now we
know why.