1.75mm Filament vs 3mm Filament April 14, 2012 01:38PM |
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Re: 1.75mm Filament vs 3mm Filament April 14, 2012 03:33PM |
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Re: 1.75mm Filament vs 3mm Filament April 14, 2012 09:40PM |
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Re: 1.75mm Filament vs 3mm Filament April 14, 2012 10:02PM |
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Re: 1.75mm Filament vs 3mm Filament April 15, 2012 01:19AM |
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Re: 1.75mm Filament vs 3mm Filament April 15, 2012 07:24AM |
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Re: 1.75mm Filament vs 3mm Filament April 15, 2012 05:14PM |
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Re: 1.75mm Filament vs 3mm Filament April 18, 2012 11:21PM |
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Re: 1.75mm Filament vs 3mm Filament April 19, 2012 02:34AM |
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Re: 1.75mm Filament vs 3mm Filament March 31, 2014 11:23AM |
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Re: 1.75mm Filament vs 3mm Filament April 01, 2014 05:04AM |
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Quote
Sublime
It seems that everyone thinks that 1.75mm takes less force but as far as I understand this is not true. A certain volume of plastic going through a certain size hole at a certain rate takes exactly the same pressure regardless of the filament input size. Or to put it simpler, the nozzle diameter determines the pressure required to extrude not the filament.
Its like assuming a hydraulic system with 2" lines some how has more force than one with 1/2" lines. The only difference is the maximum volume per minute that one gives over another. The actual force is determined by the cylinder diameter which is the equivalent of the nozzle hole.
The only difference I am aware of with 1.75 over 3mm is the volume of plastic per step. 3mm puts out almost 4 times the volume of plastic per step as 1.75mm in the same extruder. The only time this matters is when printing really small layers, like 0.1 and less combined with a really complex model. If you want to try and print really tiny layers with 3mm you can make an extruder with a lower gear ratio, like 10:1 instead of the stock 3.3:1
Re: 1.75mm Filament vs 3mm Filament April 01, 2014 05:26AM |
Registered: 12 years ago Posts: 258 |
Quote
Sublime
It seems that everyone thinks that 1.75mm takes less force but as far as I understand this is not true. A certain volume of plastic going through a certain size hole at a certain rate takes exactly the same pressure regardless of the filament input size. Or to put it simpler, the nozzle diameter determines the pressure required to extrude not the filament.
Its like assuming a hydraulic system with 2" lines some how has more force than one with 1/2" lines. The only difference is the maximum volume per minute that one gives over another. The actual force is determined by the cylinder diameter which is the equivalent of the nozzle hole.
The only difference I am aware of with 1.75 over 3mm is the volume of plastic per step. 3mm puts out almost 4 times the volume of plastic per step as 1.75mm in the same extruder. The only time this matters is when printing really small layers, like 0.1 and less combined with a really complex model. If you want to try and print really tiny layers with 3mm you can make an extruder with a lower gear ratio, like 10:1 instead of the stock 3.3:1
Re: 1.75mm Filament vs 3mm Filament June 25, 2014 07:00PM |
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Re: 1.75mm Filament vs 3mm Filament June 25, 2014 09:46PM |
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Re: 1.75mm Filament vs 3mm Filament June 25, 2014 11:40PM |
Re: 1.75mm Filament vs 3mm Filament June 26, 2014 12:36AM |
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Re: 1.75mm Filament vs 3mm Filament June 26, 2014 03:39AM |
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Quote
andyinyakima
So sheepdog43, you think 1.75 mm jhead would be a better place to start and compare results with the one I have now?
If I do decide on metal I will research it well, thanks.
Re: 1.75mm Filament vs 3mm Filament June 26, 2014 04:46AM |
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Re: 1.75mm Filament vs 3mm Filament June 26, 2014 10:17AM |
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Quote
Srek
I agree with vegasloki. You will get more out of calibrating your machine than changing the filament. In the german forum the user Hardwarekiller is using 3mm filament to print to the highest standards i have seen yet. The filament size does not make the difference in quality, the calibration of your machine and the quality of the hotend does.
Re: 1.75mm Filament vs 3mm Filament June 26, 2014 10:39AM |
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Re: 1.75mm Filament vs 3mm Filament June 26, 2014 11:04AM |
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I tried both direct and geared, honestly, there isn't much of a difference most of the time. The geared ones have more power, the direct ones are faster. With 3mm filament a direct drive is usually to low powered for any kind of printing speed so those are mostly used for 1.75mm.Quote
andyinyakima
The last part of your statement is what I suspect on my hotend, not so great quality. That's why I was thinking of a metal hotend.
I have also been thinking about direct drive extruder versus gear drive; any comments appreciated.
One last question how critical is g-code? I am using Slic3r 1.0.1.
Re: 1.75mm Filament vs 3mm Filament June 26, 2014 01:36PM |
Registered: 10 years ago Posts: 439 |
10% is far too high. I see no reason to use a supplier who can't guarantee 5% .Quote
sheepdog43
Another problem is filament precision, anything over 10% out of spec is considered problematic. On 3mm, this is .3mm that is a HUGE deviation and very easy to stay within spec, on 1.75mm, you are allowed only .17, which is troublesome for some manufacturers. I have had some 1.75mm filament that was .24mm out of spec and jammed my bowden tube so bad I had to hammer a stiff metal rod into the tube to get it out.