Searched everywhere.
Posted by gilsah
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Re: Searched everywhere. March 13, 2014 01:37PM |
Hello gilsah,
Just a thought... It looks like you have a repetitive pattern of both over and under extrusion/flow rate.
Hopefully your not using an archaic hobbed bolt filament driver in your extruder... and your are using a precision MK7 Filament Driver (Quality Made in the USA).
In reference to a filament driver that is eccentric to it's rotational axis... If your filament driver/hobbed bolt is running eccentric (typical in a geared extruder design; my god people, it is crude hardware store bolt and not a precision machined purpose built filament driver), or the filament driver is eccentric in regards to the stepper motors shaft axis it's attached to (in direct drive extruder design), the filament driver pitch diameter would effectively fluctuate causing this effect (a repetitive pattern of both over and under extrusion/flow rate).
An eccentric running filament driver will also cause a similar affect to missed extruder steps, and of course a combination of under extrusion and over extrusion, and will always produce a similar repetitive pattern in your print. And if your extruder uses any printed gears (e.g. Wade's Geared Extruder), precise consistent extrusion flow is simply not possible, as printed gears are not geometrically perfect, nor ever concentric enough being able to maintain a constant pitch diameter for producing consistent extrusion flow.
You might want to read this before unnecessarily fiddling with you slicing software or firmware Extruder Drive Eccentricity Problems.
Another reason why you never want to use a hobbed bolt for a filament driver.
Hope this helps you... enjoy Happy Printing !
Shawn
__________________________________________________________________________________________________________________
25+ Years Experience as a Manufacturing Engineer and New Product Developer
Three Years Experience... Printing 6-8 hours a day, 5 days a week, complex and close tolerance functional engineering prototypes.
Printing PLA @0.1mm Layer Height with +- 0.05mm tolerance for all dimensional shapes (except slightly undersized hole I.D.s).
No printing of... toys, trinkets, low quality prints, or other useless printed objects.
Edited 3 time(s). Last edit at 03/13/2014 02:56PM by ShawnT98027.
Just a thought... It looks like you have a repetitive pattern of both over and under extrusion/flow rate.
Hopefully your not using an archaic hobbed bolt filament driver in your extruder... and your are using a precision MK7 Filament Driver (Quality Made in the USA).
In reference to a filament driver that is eccentric to it's rotational axis... If your filament driver/hobbed bolt is running eccentric (typical in a geared extruder design; my god people, it is crude hardware store bolt and not a precision machined purpose built filament driver), or the filament driver is eccentric in regards to the stepper motors shaft axis it's attached to (in direct drive extruder design), the filament driver pitch diameter would effectively fluctuate causing this effect (a repetitive pattern of both over and under extrusion/flow rate).
An eccentric running filament driver will also cause a similar affect to missed extruder steps, and of course a combination of under extrusion and over extrusion, and will always produce a similar repetitive pattern in your print. And if your extruder uses any printed gears (e.g. Wade's Geared Extruder), precise consistent extrusion flow is simply not possible, as printed gears are not geometrically perfect, nor ever concentric enough being able to maintain a constant pitch diameter for producing consistent extrusion flow.
You might want to read this before unnecessarily fiddling with you slicing software or firmware Extruder Drive Eccentricity Problems.
Another reason why you never want to use a hobbed bolt for a filament driver.
Hope this helps you... enjoy Happy Printing !
Shawn
25+ Years Experience as a Manufacturing Engineer and New Product Developer
Three Years Experience... Printing 6-8 hours a day, 5 days a week, complex and close tolerance functional engineering prototypes.
Printing PLA @0.1mm Layer Height with +- 0.05mm tolerance for all dimensional shapes (except slightly undersized hole I.D.s).
No printing of... toys, trinkets, low quality prints, or other useless printed objects.
Edited 3 time(s). Last edit at 03/13/2014 02:56PM by ShawnT98027.
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