u/Embarrassed-Emu-6322

Hello everyone,

I recently update my Neptune 3 plus to have an all metal hot end and acre in thermistor in hopes to print ABS for props. I completed two benches but was having oozing occur on the overhangs and random holes inside the layers.

I was advised to do some filament calibrations and have been printing temperature towers, retraction towers and flow towers.

I printed three temperature towers and did not have a complete bridge on any of them. The cooler I got, the closer I got to a completed bridge. I ended up using Cura’s ABA, ABS and PLA + temp towers since they had a wide variety of temperatures. I found that 210 C is the closest I got to a completed tower. (Pics 1 and 2)

I printed a retraction tower in cura next. At 210 I had no problems with the towers completing and zero stringing. However I found a 2mm retraction worked best.

I moved on to a flow tower and that’s where it went haywire. Non of the flow towers worked and they just created a bunch of oozing. (Pic 4)

I threw in a picture of the benchy to show the problem I was having with the holes.

I’ve had no adhesion issues since I come out and the prints are super stuck to the plastic.

I’m currently printing a speed tower to see the results there.

So far I have the following calibration:

Printing temp: 210 C

Bed temp: 100 C

Retraction: 2mm

Flow: IDK

I’m printing with an enclosure and turned off the venting fan. I’ve also been allowing the chamber to preheat for 30 minutes by heating the bed at 100 C

Am I overthinking? Should I just move on to bigger prints?

Neptune 3 Plus

After market All Metal Hotend and after market tent

Layer Height: .2mm

Wall Thickness 1.24mm

Infill: 15%

Printing Temp: 250 C initial printing temp: 260 C

Bed Temp: 100 C

Flow: 100%

Print Speed: 40.0 mm

Travel speed: 150.0 mm

Retraction Distance: 1.5 mm

Retraction Speed: 40.0 mm

Cooling: 0.0

Hello everyone. I feel like for my purposes(prop making) I’m almost there when it comes to ABS printing. Recently I changed out my Neptune 3 to an all metal hot-end as recommended by another forum. I printed benchy and then adjusted retraction settings. The problem I’m finding is the arches on benchy have some pooling of material and there’s random holes throughout the prints. Between 1 and 3 I’ve lowered the retraction distance, increased the retraction speed. I also got rid of the fans. So far the only fan running is the exhaust fan to the tent which sends the fumes out of the garage. I’m at a loss right now. Idk if I should increase fans a little bit, slow the print speed further.

(There is no #2 because I completely blew up the setting on #2 with even worse results than #1)