TrinityLabs Micro Extruder 1.0

by ezmobius, published

TrinityLabs Micro Extruder 1.0 by ezmobius Jun 5, 2012
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TrinityLabs Micro Extruder 1.0 by ezmobius is licensed under the GNU - GPL license.

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This is the first 1.0 release of the new TrinityLabs micro direct drive extruder platform. This direct pinch extruder uses a small gear head stepper from eMinebea that is 56oz/in holding torque before the 30:1 delrin planetary gear head. So this little motor has way more then plenty of torque to direct drive 3mm or 1.75mm filament.

The motor is also so small it only weighs 118grams. And so this entire extruder including the motor, the extruder body, the idler, all vitamins, a 40mm fan and shroud and a Jhead hot end only weighs a grand total of 199grams. Compare this to 560grams for an average Wades or 790grams for a MakerGear plastruder and you can see that this little extruder can allow you to print very fast without the need for a bowden cable setup since the motor is so lightweight.

I have tested this extruder with 5 klilos of plastic and print quality is excellent all the way up to 200mm/sec and probably further even. It is even capable of lifting a MendelMax 3d printer off the table and have it climb up the 3mm filament if it it bnot rowing freely from the spool(don't ask me how I know this;).

The only issue I had with the entire 5 kilos of testing was during a 12hour + ABS print at 230C I melted the delrin gear head enough to warp it and ruin that motor.

So I have added a fan shroud with a 40mm cpu cooler fan that bows on the back of the gear head stepper motor and this has fixed that issue entirely. I am now very confident this extruder is ready for prime time.

So I hereby release version 1.0 that is well tested and printing very nicely.

Since this thing has so very light stay tuned for a dual extruder version com in very soon that will still weigh less then a single Wades extruder!

We now have this motor as well as the hobbled gear and all vitamins and printed parts in our store here >>



If you want to print the Extruder body, Idler and Fan Shroud all in one plater then print the trinity-micro-extruder-and-fan-shroud-plate-v1.0.stl file.

If you just want the extruder and idler then print the trinity-micro-extruder-v1.0.STL file.

If you only want the fan shroud for this motor to use with another extruder like RCX(Ron's Compact Extruder) then print the trinity-micro-fan-shround-v1.0.stl file.

Assembly is fairly easy. You will need:
1 x 605ZZ skate bearing that is 14mm OD, 5mm ID and 5mm wide.
1 x M5 10mm long bolt for the idler to spin on
1 x blddk or makerbot or mini hyena hobbed gear for a 5mm shaft
2 x M3 25mm long bolts
2 x M3 nylock nuts
1 x 40mm CPU fan
1 x M3 60mm long bolt with a spring on it and a washer on it for tightening the idler
1 x wood or aluminum adapter plate for mounting a wades extruder to a prusa x carriage
1 x eMinebea gearhead stepper model number PG35L-048-USC0 ( available in the http://trinitylabs.com store with the old gear pulled and a blddk or makerbot hobbled gear pre-installed)
1 x set of printed body, idler and fan shroud
1 x hot end with groove mount mounting system

Assembly is fairly easy. You can pretty much see how it goes together by looking at these photos attached to this thing.

The last 3 photos in the set of images are prints done with this extruder. The printed slot, the mendelmax x-end and the terminator skull were all printed with this extruder in 3mm ABS filament with a jhead 0.5mm nozzle.

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Neither of the links appear to work so that makes this project a non starter from my point of view

TrinityLabs appears to be defunct. Is there anywhere else I can find the matching stepper?

does anyone have settings for this motor type running 1/16 ramps 1.4 board handy

does anyone have settings for this motor type running 1/16 ramps 1.4 board handy

are you running this motor with a pololu or some other motor driver?? as the resistance on these motors is very high ...is it ok to run them with the pololu drivers?

Do you have a design file for that little aluminum bracket that holds the j-head in the extruder?


Which X carrier should be used? I have the self aligning bushings.



Will you provide the scad for the extruder too?

I just re-uploaded the STL files because one of them was not manifold and I accidentally uploaded a version of the extruder body that did not have the mounting holes to use a groove mount plate to mount it to an x carriage.

All the stl files should now be manifold as well as have the proper mounting holes.

A few issues with the STL and associated parts in your trinity labs vitamin kit.

1) The preconfigured build plate still has an extruder base without any holes for mounting to the x-carriage. The individual parts are accurate but you should probably update the build plate.

2). The M3 bolts that attach the fan shroud, motor and extruder are 5-10mm too short. The bolt that att
aches the idler wheel assembly is at least 20-30mm too short and has no spring included.

Other than those few issues, it looks like a pretty solid design, can't wait to get it up and running.

slic3r reports this being not manifold. Upon running this through netfab I was able to reduce it to only 20

Slicer 0.8.2 did not have a problem with the extruder or fan shroud files for me.

Hello Ezra,

I checked the stepper datasheets. (The ones I could find on the internet http://www.neuhold-elektronik.at/datenblatt/N8265.pdf)http://www.neuhold-elektronik....
I think the holding torque is after the reduction.
(The torque/reduction ratio between the two motors is in the same range. This is also the case for all other motors i
n this datasheet)




There are conflicting data sheets on the net. But I have here the tin can stepper with and without the gear head. The tin can stepper without the gear head is 56oz/in holding torque. The delrin gear heads I have on these motors is a 30:1 ratio.

Regardless of what the torque truly is, this littl
e extruder is capable of letting a full sized mendelmax printer climb up a 3mm filament that is attached securely to the roof without any slippage. So I am certain it has more then enough torque to push filament through any hot ends :P


Well no Minebea stepper in that shop. But why do i get to the mendelmax store from Trintylabs site?


the gear head stepper with the useless gear pulled and a high quality hobbled gear installed is now for sale in the store along with all the other vitamins and printed parts, you can customize it however you like now.

I had two of these arrive today. Both of the high quality gears are rusty
amp; some of the hardware is too short to fit the fan shroud, motor and extruder body? :(


Sorry about that, we had one batch of jibbed gears that weren't surface treated properly and a few rusted in the mail.

If you email me at [email protected] with your order number or the email address you sign into the store with I will take care of you, you can keep the rusty hobbed gears(a litt
le brushing with a steel bristle brush with clean em right up) ill send you brand new shiny bobbed gears as well as 2 prints of the 2.0 version of this Extruder I am going to release here on thing oversee today.

It's much improved with a hindged idler and way larger accessibility window.

Also the
stl file uploaded here appears to have no mount holes :(

Please email me ASAP and I will rush out some new replacements plus some free prints of the new Extruder body assembled with all vitamins free of charge.


I am wondering if you received my email?

Email sent to you, thank-you for the fast reply.

TrinityLabs is my company and maxbots and the mendelmax project recently joined. our website is a hit of a mess and I'm a tad embarrassed buy its current form :/

But wee are actually working on it right now to update the site to look the same as the store and get rid of the http://store.mendelmax.comstore.mendelmax.com url to redirect to http://store.trinitylabs.comstore.trinitylabs.com.

I will get the gear head steppers for this extruder put in the store by tomorrow along with full kits for this extruder in
cluding jhead or arcolv4 hot ends and all vitamins etc.

Just wanted to get the files and info released right away because folks have been asking for this for a while but I did not want to release until I had done rigorous testing,.

I have pushed more then 5 kilos of ABS through this extruder desig
n now and after the addition of the fan shroud it is a rock solid extruder that weighs almost nothing,.

I am sorry about the confusion with the websites, we will have that fixed very soon and you will be able to get these motors and all other parts for this extruder in the store by tomorrow.


Same company, Ezmobius, Maxbot and a bunch of other devs have went together to form TrinityLabs. Nothing shady I promise.

Well ok. That was new to me. So he just need to add that to his shop. :-)