1.75mm filament

I just accidentally bought some 1.75mm ABS filament when I intended to get the 3mm I've used so far, and I want to ask, how well does it work with existing extruders? I have a Wade's extruder with an old type hot end. Will I need to make another hobbed bolt with a thinner groove? Will this work out of the box? Will I have to double E_STEPS_PER_MM?

from what i know, and from some testing of my own, you will need to pretty much make a smaller hot end, it will not seal so there would be no or very little pressure to push the liquid out of the tip.

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[mike-mack.blogspot.com]

Your e_steps_per_mm will need to be much higher. 3 mm cross section is 7 mm^2, where 1.75 mm cross section is 1.2026 mm^2, meaning your e_steps_per_mm will need to be 5.82 times higher. Also, you will be able to do short runs of 1.75 mm filament in your hot end, but it will backflow eventually and plug up. You will need a new, smaller hot end. You just need a new thermal barrier and barrel, everything else can stay the same.

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The area of a 1.75mm circle is 2.4053mm, so steps per mm is 2.94 times higher, i.e. (3.0/1.75)^2.

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[www.hydraraptor.blogspot.com]

nophead Wrote:
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> The area of a 1.75mm circle is 2.4053mm, so steps
> per mm is 2.94 times higher, i.e. (3.0/1.75)^2.

Eh, you're right. I mistyped something in my calculator :/

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Interesting. I'll see if I can get a small hotend working. Thanks everyone

jsadusk
can you comment on how 1,75mm filament printes compere to ones made of 3mm? Are they better quality?

Makes. No. Difference.

The only difference is how easy it is to route the filament from the spool to your nozzle.