Extruder performance - can it be measured? June 25, 2012 06:37PM |
Registered: 12 years ago Posts: 88 |
v = sqrt( u^2 + 2 * a * s ) where: v = final velocity (mm/s) u = initial velocity (mm/s) a = acceleration (mm/s^2) s = travel (mm) t = time (s)
s = 20mm/2 = 10mm
u = 20mm/s, initial speed a = 3000mm/s^2, acceleration
v = sqrt( (20mm/s)^2 + 2*3000mm/s^2*10mm = 245.7 mm/s
s = (v^2 - u^2) / (2 * a) s = ((350mm/s)^2 - (20mm/s)^2) / (2 * 3000mm/s^2) = 20.35mm
Re: Extruder performance - can it be measured? June 25, 2012 06:47PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 25, 2012 07:01PM |
Registered: 13 years ago Posts: 301 |
Re: Extruder performance - can it be measured? June 25, 2012 07:48PM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 25, 2012 08:11PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 25, 2012 09:01PM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 25, 2012 09:11PM |
Registered: 13 years ago Posts: 301 |
Re: Extruder performance - can it be measured? June 25, 2012 09:52PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 26, 2012 03:00PM |
Registered: 12 years ago Posts: 88 |
1. Formalized tests require well calibrated machines and standard/known quality of filament. 2. Test conditions that must be stated: 2.1 - X,Y,Z axis feed rate, mm/s 2.2 - X,Y,Z acceleration, mm/s^2 2.3 - Filament average diameter, mm 2.4 - Die swell (mid air extrusion diameter), mm 2.5 - Ambient temperature, °C 2.6 - Ambient humidity, % 3. Test results should include the following: 3.1 - Quality grade, [1,2,3] or [low, average, high] 3.2 - Minimum Usable Feed Rate, FRMN, mm/s 3.3 - Maximum Usable Feed Rate , FRMX, mm/s 3.4 - Recommended Feed Rate, FR, mm/s 3.5 - Filament Grip Force, GF, N or kp 3.6 - Filament Grip Deformation, GD, % 3.7 - Description of grip failure reason, [slippage, filament break, other] 3.7 - Photographs for each of FRMN, FRMX, FR, as follows: 3.7.1 - Overview of print 3.7.2 - Closeups of the four test box corners 3.7.3 - Overview of failed test box, where test ended
Re: Extruder performance - can it be measured? June 26, 2012 03:11PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 26, 2012 03:31PM |
Admin Registered: 17 years ago Posts: 7,879 |
Quote
I believe what I have read (don't quote me on it) was that the force required to extrude goes up by a fourth power as the nozzle exit hole length doubles.
Re: Extruder performance - can it be measured? June 26, 2012 03:42PM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 26, 2012 03:55PM |
Registered: 13 years ago Posts: 2,947 |
Quote
J-head blog [url]http://jheadnozzle.blogspot.com/[/url]
This will leave the following nozzle orifice lengths:
Budaschnozzle: 0.0095 (0.24mm) Prints fast but known for ooze
MakerBot Mk V: 0.0515 (1.32mm) Prints well but known for not going fast
MakerGear: 0.0335 (0.85mm) Known as an all around good hotend
J-Head: 0.0495 (1.26mm) Prints well but known to have speed limitations
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 26, 2012 04:58PM |
Registered: 12 years ago Posts: 88 |
Draft Extruder Performance Test, rev. 0.2 ----------------------------------------- 1. Formalized tests require well calibrated machines and standard/known quality of filament. 2. Test conditions that must be stated for each test: 2.1 - Filament 2.1.1 - Material, [PLA, ABS, other] 2.1.2 - Filament average diameter, mm 2.1.3 - Die swell (mid air extrusion diameter), mm 2.2 - Thermal conditions 2.2.1 - Melt zone temperature, °C 2.2.2 - Temperature fluctuation, % 2.2.3 - Ambient temperature, °C 2.2.4 - Ambient humidity, % 2.3 - Mechanical conditions 2.3.1 - X,Y,Z acceleration, mm/s^2 2.4 - Nozzle data 2.4.1 - Nozzle orifice diameter, mm 2.4.2 - Nozzle orifice length, mm 3. Test results should include the following: 3.1 - Quality grade, [1,2,3] or [low, average, high] 3.2 - Minimum Usable Feed Rate, FRMN, mm/s 3.3 - Maximum Usable Feed Rate , FRMX, mm/s 3.4 - Recommended Feed Rate, FRR, mm/s 3.5 - Filament Grip Force, GF, N or kp 3.6 - Filament Grip Deformation, GD, % 3.7 - Description of grip failure reason, [slippage, filament break, other] 3.7 - Photographs for each of 3.2, 3.3, 3.4, as follows: 3.7.1 - Overview of print 3.7.2 - Closeups of the four test box corners 3.7.3 - Overview of failed test box, where test ended
Re: Extruder performance - can it be measured? June 26, 2012 05:14PM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Extruder performance - can it be measured? June 26, 2012 05:37PM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 26, 2012 05:48PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 26, 2012 06:41PM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Extruder performance - can it be measured? June 26, 2012 06:54PM |
Registered: 12 years ago Posts: 88 |
Draft Extruder Performance Test, rev. 0.3 1 Procedure 1.1 Formalized tests require well calibrated machines and standard/known quality of filament. 2 Test conditions 2.1 Filament 2.1.1 Material [PLA, ABS, other] 2.1.2 Filament average diameter mm 2.1.3 Die swell (mid air extrusion diameter) mm 2.2 Thermal 2.2.1 Melt zone temperature °C 2.2.2 Temperature fluctuation % 2.2.3 Ambient temperature °C 2.2.4 Ambient humidity % 2.3 Mechanical 2.3.1 X,Y,Z acceleration mm/s^2 2.4 Nozzle data 2.4.1 Nozzle orifice diameter mm 2.4.2 Nozzle orifice length mm 3 Test results 3.1 Quality 3.1.1 Quality grade [low, average, high] 3.2 Speed 3.2.1 Minimum Usable Feed Rate, FRMN mm/s 3.2.2 Maximum Usable Feed Rate , FRMX mm/s 3.2.3 Recommended Feed Rate, FRR mm/s 3.3 Mechanical 3.3.1 Filament Grip Force, GF N 3.3.2 Filament Grip Deformation, GD % 3.3.3 Description of grip failure reason [slippage, break, motor, other] 3.4 Photographs 3.4.1 Overview of print [photo] 3.4.2 Closeups of the four test box corners [photo] 3.4.3 Overview of failed test box, where test ended [photo]
Re: Extruder performance - can it be measured? June 26, 2012 07:21PM |
Registered: 12 years ago Posts: 88 |
Quote
nophead
I don't think feed rates are relevant to extruder
performance, it should be flow rate.
Re: Extruder performance - can it be measured? June 26, 2012 07:53PM |
Registered: 12 years ago Posts: 88 |
- Set the temperature to 185°C - Extracted 10mm of filament - Cut the extrusion at the nozzle - Waited for 60s - Turned off the heater - Waited for it to cool to ambient temperature - Cut the ooze at the nozzle and straightened it - Measured the oozeIt measured 16.5mm in length, ϕ0.98mm.
Draft Extruder Performance Test, rev. 0.4 3.3 Thermal 3.3.1 Ooze length mm 3.4 Mechanical 3.4.1 Filament Grip Force, GF N
Re: Extruder performance - can it be measured? June 26, 2012 08:27PM |
Registered: 13 years ago Posts: 2,947 |
FFF Settings Calculator | Gcode post processors | Geometric Object Deposition Tool Blog |
Tantillus.org | Mini Printable Lathe | How NOT to install a Pololu driver |
Re: Extruder performance - can it be measured? June 27, 2012 03:31AM |
Admin Registered: 17 years ago Posts: 7,879 |
Quote
So the question is which units will be more useful to the end user.
Re: Extruder performance - can it be measured? June 27, 2012 06:49AM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 27, 2012 07:37AM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 27, 2012 09:56AM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Extruder performance - can it be measured? June 27, 2012 07:22PM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 28, 2012 04:25AM |
Admin Registered: 17 years ago Posts: 7,879 |
Re: Extruder performance - can it be measured? June 28, 2012 06:56AM |
Registered: 12 years ago Posts: 88 |
Re: Extruder performance - can it be measured? June 28, 2012 07:37AM |
Admin Registered: 17 years ago Posts: 7,879 |