Belted Extruder V.3 for 1.75mm
There are 3 versions here.
Two for m6 thread push-fittings (with and without support) and one for 1/8BSP thread.
I have made a Belted Extruder V.3 for 2.85mm as well.
If you are looking for a direct-drive (still geared with belt) I have made a Direct-Drive Belted Extruder 1,75mm V2 compatible with Prusa.
Everything for my Belted Extruders, including Mounting brackets can be found in the my Collection: Belted Extruders by Dintid.
- You do not have to open idler to load filament, which makes it very easy to change filament!
- Silent running due to belt operation
- Higher accuracy and longelevity due to aluminium gears instead of printed gears.
- Build in mount points on 3 sides. Compatible with standard Nema 17 brackets - 31mm mount hole distance from center to center.
- I have succesfully printed using Shore D40 and D60 Flexibles, where number denotes softness. Pure Ninjaflex (shore A 85) does not work due to bowden.
* Read wiki: Shore durometer if interested.
- I use a 60-GT2 aluminium pulley to avoid inaccuracies and avoid wear and tear of printed gear.
- I am using a 16-GT2 Pulley for my small gear, which gives a ratio of 1:3.75
- If you use a 20-GT2 Pulley for small gear you get ratio 1:3
- Belt needed 172mm/86 teeth - 188mm/94 teeth
- A Nema 17 motor - I use a small 0.9 steps pancake motor.
- Belt is tightened by sliding motor away.
- Strongly advice you to buy Hobbed Bolt from E3D - you can also buy it from Filastruder if that is easier for you.
- Push-Fitting with m6 thread
- With 32 microstepping and normal 1.8 degree Nema, the steps are about 1100mm/s filament, so ultra high definition and high torque
- 60GT-2 Pulley
- 16GT-2 or 20GT-2 Pulley
- E3D Hobbed Bolt - Hobb-Goblin-8mm-Shaft
- A belt with length between: 172-GT2 to 188-GT2.
- Note: 200-GT2 is too long.
- 2x m6 Push-Fitting for 1.75mm filament
- 2x 20mm steel springs. 1mm thick
- 2x m3 50mm (or longer) Partially Threaded Socket Head Cap screws
- 3x 608 bearings. 8x22x7 - Type doesn't matter.
- Various m3 nuts, screws and spacers
Nema 17 used
I am using Nema 17 "pancake" as in flat model.
Manufacturer Part Number: 17HM08-1204S
0.9deg Nema 17 Stepper Motor 1.2A 11Ncm/15.6oz.in 42x42x20mm
It's plenty to drive this, and I am currently using it to pull filament from a huge 2.3kg roll of filament.
You can ofcourse use bigger motors, but I rather like this model for it's compact size and great accuracy.
I found it on german ebay.
Print files as oriented.
- I printed using 0.4mm nozzle
- I used normal PLA
- 3 Perimeters/Borders
- 3 Top and Bottom layers
- Use a strong Infil like Triangles in Cura 2.3
- All necessary supports are build in
- Use 44% infill or higher.
- Do not make weak finger-release parts
Brackets for my Extruders
I've made a Collection named Belted Extruders by Dintid where all my items related to my Belted Extruders is going to be added.
Please let me know if you need a special bracket.
Remove supports colored red here.
Tested ok using 172-GT2 to 188-GT2. 200-GT2 is too long.
Use some painters tape or similar if the bearing is wobbling when assembled, which it most likely does.
If your bearing sits loosely, try downloading
A few stepper examples. Remember to do a proper measurement yourself. I have rounded the numbers up/down.
- 16-GT2 + 60-GT2 pulleys + 1/32 multistepping + 0.9degree motor = 2050 steps/mm
- 16-GT2 + 60-GT2 pulleys + 1/16 multistepping + 0.9 degree motor = 1025 steps/mm
- 16-GT2 + 60-GT2 pulleys + 1/32 multistepping + 1.8 degree motor = 1025 steps/mm
- 16-GT2 + 60-GT2 pulleys + 1/16 multistepping + 1.8 degree motor = 510 steps/mm
Do not skimp on Hobbed Bolt. Left one is E3D.. other one is from respectable local shop... Just go E3D.