Precious Plastic Extruder: Difference between revisions
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{{Hint|This work builds upond the precious work of Precious Plastic. We are indebted here to Dave Hakkens. See https://preciousplastic.com/en/videos/download.html}} | {{Hint|This work builds upond the precious work of Precious Plastic. We are indebted here to Dave Hakkens. See https://preciousplastic.com/en/videos/download.html}} | ||
=Working Doc= | |||
<html><iframe src="https://docs.google.com/presentation/d/e/2PACX-1vQVpCr4l4znaERO4xb2QzWN5tlorVIE_BNHabLZTI5TTevLED-35nT1-vjyMT6KdxP1ujDfe40KJ7jh/embed?start=false&loop=false&delayms=3000" frameborder="0" width="480" height="299" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html> | <html><iframe src="https://docs.google.com/presentation/d/e/2PACX-1vQVpCr4l4znaERO4xb2QzWN5tlorVIE_BNHabLZTI5TTevLED-35nT1-vjyMT6KdxP1ujDfe40KJ7jh/embed?start=false&loop=false&delayms=3000" frameborder="0" width="480" height="299" allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html> | ||
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* | * | ||
=OSE Version CAD= | =OSE Version Design Rationale= | ||
*Slow auger version powered by a Nema 17 with large auger. | |||
*Vertical hang to reduce auger power requirement | |||
*Remove flow control screw and rely on temperature and auger speed instead. PP version doesn't have speed control on motor, so motor control produces additional control required here | |||
* | |||
=Heuristic Calculations= | |||
*We want low speed equivalent to a strong corded drill such as [https://manuals.harborfreight.com/manuals/60000-60999/60495.pdf]. | |||
[[File:cordeddrilltorque.png]]. | |||
*[[Torque Calculator]] shows this drill has only about 30 in-lb torque | |||
*This is more like it - [https://manuals.harborfreight.com/manuals/63000-63999/63112.pdf] - 0-600 RPM, same power - means - 140 in-lb. | |||
*PP shredder is 1770 in lb - 10x stronger - [[Precious_Plastic_Shredder#Torque_and_RPM]] | |||
*We have experience with Lyman filament maker, 50W, 140 in lb: | |||
[[File:lymanmotor.png|600px]] | |||
*About 140 in lb for motor above. This should be plenty for an extruder application. | |||
*If we take a 1A, 12V motor - Nema 17 - that is 1/4 the power of the above. | |||
*But power for steppers apparently doesn't work like this - as that indicates 600x geardown if we consider power alone. 140 in lb is 140*16 in-oz = 2240 oz in. Then we need 30 geardown for a Nema 17 motor at low speed. That is well doable for a 3D printed geardown. | |||
:*Note that Nema motors retain good torque at 300 RPM, so we obtain 10 RPM within the good torque regime. | |||
*Let's move on to [[Planetary Geardown]]. | |||
=CAD - OSE Version= | |||
*This is the OSE version remake. See https://github.com/OpenSourceEcology/Extruder | |||
==Filament Extruder== | |||
[[File:filamenter_motor.png|100px]][[File:filamenter_auger.png|100px]][[File:filamenter_controller.png|100px]][[File:filamenter_bearing.png|100px]][[File:filamenter_flowcontrol.png|100px]][[File:filamenter_overall.png|100px]][[File:filamenter_flowadjust.png|100px]][[File:filamenter_final.png|100px]][[File:filamenter_wallmount.png|100px]] | |||
<gallery perrow=6> | |||
File:filamenter_wallmount.png|'''Overall Build''' - FreeCAD -[[File:filamenter_overall.fcstd]] | |||
File:filamenter_motor.png|'''Overall Build''' - FreeCAD -[[File:filamenter_motor.fcstd]] | |||
File:filamenter_auger.png|'''Auger''' - FreeCAD -[[File:filamenter_auger.fcstd]] | |||
File:filamenter_bearing.png|'''Auger''' - FreeCAD -[[File:filamenter_bearing.fcstd]] | |||
File:filamenter_flowcontrol.png|'''Auger''' - FreeCAD -[[File:filamenter_flowcontrol.fcstd]] | |||
File:filamenter_flowadjust.png|'''Auger''' - FreeCAD -[[File:filamenter_flowadjust.fcstd]] | |||
</gallery> | |||
==Extruder Controller== | |||
[[File:filementer_controller.png|100px]] | |||
<gallery perrow=6> | |||
File:filamenter_controller.png|'''Overall Build''' - FreeCAD -[[File:filamenter_controller.fcstd]] | |||
</gallery> | |||
=BOM Candidates= | =BOM Candidates= | ||
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*OD of pipe union | *OD of pipe union | ||
*1.25" and 1.75" nozzle heaters are available easily - [https://www.ebay.com/itm/NOZZLE-HEATER-1-5-X-1-5/172592368127?hash=item282f4e89ff%3Ag%3AonQAAOSwc-tY1Y6r&_sacat=0&_nkw=1.5%22+nozzle+heater&_from=R40&rt=nc&_trksid=p2047675.m570.l1313.TR3.TRC0.A0.H0.X1.5%22+nozzle+heater.TRS0] | *1.25" and 1.75" nozzle heaters are available easily - [https://www.ebay.com/itm/NOZZLE-HEATER-1-5-X-1-5/172592368127?hash=item282f4e89ff%3Ag%3AonQAAOSwc-tY1Y6r&_sacat=0&_nkw=1.5%22+nozzle+heater&_from=R40&rt=nc&_trksid=p2047675.m570.l1313.TR3.TRC0.A0.H0.X1.5%22+nozzle+heater.TRS0] | ||
=Links= | |||
*[[Low-Speed Drill]] | |||
[[Category: Precious Plastic]] |
Latest revision as of 21:47, 8 April 2021
Hint: This work builds upond the precious work of Precious Plastic. We are indebted here to Dave Hakkens. See https://preciousplastic.com/en/videos/download.html
Working Doc
BOM
- Wood bit - 1" - [1]. 7/16" shank, as in 1/2" version. Local - [2]
- Pipe flange - Menards $5 - [3]
- Pipe flange - pack of 10 - Amazon - $4 ea - [4]
- 1" pipe -
OSE Version Design Rationale
- Slow auger version powered by a Nema 17 with large auger.
- Vertical hang to reduce auger power requirement
- Remove flow control screw and rely on temperature and auger speed instead. PP version doesn't have speed control on motor, so motor control produces additional control required here
Heuristic Calculations
- We want low speed equivalent to a strong corded drill such as [5].
- Torque Calculator shows this drill has only about 30 in-lb torque
- This is more like it - [6] - 0-600 RPM, same power - means - 140 in-lb.
- PP shredder is 1770 in lb - 10x stronger - Precious_Plastic_Shredder#Torque_and_RPM
- We have experience with Lyman filament maker, 50W, 140 in lb:
- About 140 in lb for motor above. This should be plenty for an extruder application.
- If we take a 1A, 12V motor - Nema 17 - that is 1/4 the power of the above.
- But power for steppers apparently doesn't work like this - as that indicates 600x geardown if we consider power alone. 140 in lb is 140*16 in-oz = 2240 oz in. Then we need 30 geardown for a Nema 17 motor at low speed. That is well doable for a 3D printed geardown.
- Note that Nema motors retain good torque at 300 RPM, so we obtain 10 RPM within the good torque regime.
- Let's move on to Planetary Geardown.
CAD - OSE Version
- This is the OSE version remake. See https://github.com/OpenSourceEcology/Extruder
Filament Extruder
Overall Build - FreeCAD -File:Filamenter overall.fcstd
Overall Build - FreeCAD -File:Filamenter motor.fcstd
Auger - FreeCAD -File:Filamenter auger.fcstd
Auger - FreeCAD -File:Filamenter bearing.fcstd
Auger - FreeCAD -File:Filamenter flowcontrol.fcstd
Auger - FreeCAD -File:Filamenter flowadjust.fcstd
Extruder Controller
File:Filementer controller.png
Overall Build - FreeCAD -File:Filamenter controller.fcstd
BOM Candidates
- Insulator brick - [7]
- Carbon fiber welding blanket insulation - [8]
- Small high torque hydraulic motor - [9] $50
- Type K Thermocouple - [10] - $7
- SSR - [11] - $7
- 1" flange - $4 on amazon - [12] or $5 menards - [13]
- PID Controller - $23 - [14]
- PID with SSR + thermocouple - $14 - [15] - got 3.
- [3] band heaters - 35x45 mm - $4 + SH - [16]
- [1] band heater - 1.75" for next coupler
- 1-3/4" coupler - [17]
- 1.75" heater - [18]
Notes
- 1.75" is 45 mm
- 35 mm is 1.38 in
- 40 mm is 1.57 inches
- OD of pipe union
- 1.25" and 1.75" nozzle heaters are available easily - [19]