3D Printed Filament Pelletizer v3 (Page 1 of 2)

Very cool!

Have you thought about using some printed gears to eliminate the need for a separate feed motor?  I've been experimenting with my own worm and pinion gears for my own pelletizer and winder projects, and found them fun to design and surprisingly functional.  I used gearing to feed filament into my own meat-grinder based pelletizer, which I also drive with a drill when i have a large amount of filament to chop.

http://www.soliforum.com/topic/5877/fil … ment-tool/

Your design seems more robust than mine (since it doesn't have metal-to-metal contact) and well suited for this if you extend the shaft holding the hobbed gear so it can line up with the shaft of the forstner bit, and maybe add a pair of gears (with about a 4:1 step-down ratio I would guess).   I may give it a shot myself if this isn't a direction you think would be worthwhile, but I really like what you've done.

Yeah, but chopping a lot of filament gets pretty tiring and the result would probably be like and old Simpson's episode where Homer is given a single barbell and gets super buff only in one arm (and uses it to swindle folks in arm wrestling). 

For longer jobs I have been attaching a drill to the end using a socket bit, which works pretty well except for the maiming threat of a handle spinning around at high speed

This may seem like a dumb question but I've never used one of the 12v gears before.  How do you adjust the speed of the motor?  Is there something on the motor to adjust or do you vary the voltage?  I can't see from the video how you have it hooked up.

bbriggsgeek,

In my opinion there is no such thing as a dumb question.
I varied the voltage with a variable power supply that
I built from plans. So all you need is a power supply that regulates
the output voltage and puts out enough amps to handle the load.
Here is nice one that you can get on eBay for $39.99 with free shipping.
This is very similar to the one that I built.
It will put out 2 amps which is more than enough to handle a small
motor that probably draws only 0.15 amps under load:

http://www.ebay.com/itm/Tekpower-HY152A … 3a8e31fcb6

A voltage supply  like this is great to have around for many uses. I have used it
countless times over the years for many different projects.

Hi wahada,

Is this a unit you could custom make for someone like myself if the price was right? I'm looking for a pelletizer.

hi wahada
which bearing do you use to fit in the pelletizer frame?
thx

thx  wahada
but i  can't print your product 
because   it's in inch  not in millimeter
could you  post yours prod  stl in mm ,please?

thanks

hi
thx elmoret

hi wahada
not yet  because i'm waiting  a 12v  motor gear 200rpm from china
actally a 12 v motor gear 3 rpm  cut very small pellet  0.7mm!
of course when i'll receive it!

hi ian

this one

http://www.ebay.fr/itm/40mm-12V-200RPM- … 097wt_1077

ho ok
this one

http://www.monsterscooterparts.com/24v10mowsp.html

You need metal for the forstner to shear against. You'd wear the printed frame quickly. You can get vented bolts from McMaster, no need to drill one.