Help ABS printing doesn’t work

[sierd]

My prints look like this how can I fix this? Thanks for the help

This is supposed to be benchy

[cobnut]

Looks like massive under-extrusion to me, so much so that I’d suspect it’s not just the extrusion rate but possibly something else. What are your temperature settings?

[sierd]

The temperature of the nozzle is 235 degrees Celsius and the bed is 100 degrees celcius.

[cobnut]

Hmm, well that’s about right for ABS. Is the filament feeding freely? Are you able to do a manual extrusion and see if it’s being extruded cleanly and at a decent rate?

Is the printer still printing PLA correctly? How old is the ABS you’re using?

[sierd]

So I just tried it with pla and it gives the same result. When I manually feed the filemant trough the 3D printer the fillemant comes straight out the nozel.

[MaddieG]

When you manually extrude, does it go straight down or does it curve up around the nozzle?

What speed are you printing at?

[cobnut]

If you’re seeing the same result with PLA that almost certainly rules out the filament as a source of the problem, which leaves the hot end assembly itself. There’s three likely issues, or possibly a combination of any or all of them. As @MaddieG said, if you’re seeing the filament curling around the nozzle that could indicate a blockage in the nozzle itself (as the filament extrudes faster from one area than another, causing it to curl). It could also be your PTFE tube (if you have one), they do degrade over time and are particularly at risk if you’ve tried printing at very high nozzle temperatures. It could also be the extruder gear, if this is clogged and/or if your idler is not providing enough pressure, the filament may not be being pushed through cleanly.

My guess would be a blocked nozzle or PTFE tube.

[wirlybird]

What print speeds, slicer?

[sierd]

So I cleaned everything and this had no affect on the print. The fillement comes straight out the nozzle. The printing speed is the following:

[wirlybird]

I would slow to 40mm/s max and then for the first layer maybe at 40%.
And make sure there is no fan on.

[cobnut]

Definitely what @wirlybird said, that printing speed is way too fast, which could explain things if your extruder is unable to keep up the pace. Outline underspeed can probably increase to 80%.

[sierd]

I changed the speed. This is de result I got.

[eckerj]

What settings do you have for filament properties (“Other” tab)?

What kind of printer/extruder? What are your retract settings? Are you using coast or wipe?

[sierd]

[sierd]

I have a cr-10

[wirlybird]

Is the cr10 a direct drive or Bowden setup? If it is direct drive then retraction is way to high. Should be 1.2-2mm to start and maybe more like 35-40 mm/s.

Extrusion multiplier should be more around 1 for ABS to start and also you need to measure the filament diameter in several places and take the average and enter it also. I find a lot of filament to be closer to 1.7 then 1.75.

You may be under extruding a bunch.

Also with ABS I tend to set an extrusion width a little higher such as .44 to .48 depending. Helps with layer bonding also.

[eckerj]

From what google has revealed, the CR10 looks to be a bowden setup. I agree with everything @wirlybird said, especially the filament diameter. I have yet to find a filament that was 1.75 in diameter. Most of the filaments I use tend to be anywhere between 1.65 to 1.71.

You’ll also want to check the tension on the extruder arm. It may be too light and not gripping the filament enough. Also check the extruder gear to see if it needs cleaning.

[sierd]

So it works a lot better now because I cut a small piece of the PTFE tube away. It blocked the fillement flow. But now I get the following result:

What do I need to do? Thanks for all your help so far.

[wirlybird]

Mainly looks under extruded. Could be from printing too fast.