YouMagine

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johntron

almost 9 years

Any chance you can upload the design documents, or at least dimensions? I just ordered a kit to replace the puny extruder on my delta printer, and need to modify the design to fit a 1/8" BSPP male compression fitting for 4mm OD tubing.

wsguy

about 9 years

If you upgrade and have the ability to print in ABS or other higher temp filament DO IT!  I recently switched to printing with PETG which prints at 240-250 C and twice I had the hot end come out of the geared extruder!   Fortunately the wires to the hot end were not damaged.Have also tried printing the flexible PLA made by INLAND (Micro Center brand, but likely eSun) but could never get more than about 1 gram out before the filament folded under the extruder gear.Had to go back to the aluminum extruder will try to print PETG body which should be able to then print PETG.

Jerry Siegel

over 9 years

I have gone back to the original aluminum set up. Problems with the gear drive: There is not enough "tooth" on the gears to grip the filament. Requiring very high pressure to keep the filament from slipping. Which puts a high load on the mounting screw. (Already dicey, being screw into the motor aluminum.) Thus requiring max setting on the motor potentiometer. Thus motor runs hot. Would work great for Ninja Flex and the like if the bugs get worked out. Jerry Siegel

nhfoley

over 9 years

So, after using this for a few months now, the gears have worn down to the point that they no longer seem to work properly. The amount of torque necessary to drive the filament has risen enormously. It seems that over time, the plastic housing of this extruder crept very slightly, and as a result, the tooth engagement became progressively less optimal. The tooth profile is obviously now worn down & misshapen, and no longer an involute. It seems that: - using a harder/stronger gear material, - increasing the gear contact area, - or using a metal housing for these gears so that perfect spacing is maintained are necessary steps for the long-term survival of this extruder design. Interested to hear your thoughts on this.

HYKGOML

over 9 years

@WyldeRhide  ouch yeah.. I have a feeling I should have found that.  Thanks for the LMGTFY!  <blush>

WyldeRhide

over 9 years

<a rel="nofollow" target="_blank" href="/users/HYKGOML" class="mentioned-user">@HYKGOML</a> Check out the article at <a rel="nofollow" target="_blank" href="http://help.printrbot.com/Guide/Installing+Gear+Head+Extruder+Gear+Head+v0.03/197">http://help.printrbot.com/Guide/Installing+Gear+Head+Extruder+Gear+Head+v0.03/197</a>

3DMakeMe

over 9 years

The arm is also too long. It can't be mounted on a dual metal plus. You need to shorten the lever.

printrbot

over 9 years

We had to move the mounting holes based on new design constraints. I wish they matched but they don't

cpederkoff

over 9 years

The mounting holes on this are 16mm apart in x and 30mm apart in y. On the aluminum extruder they are 17mm in x and 32mm in y. For revision 0.04, consider changing the mounting holes to better match the aluminum extruder (if you have the clearance between the hotend and the nuts).

HYKGOML

over 9 years

Any help on how to put V3 together?

tjb1

over 9 years

Steps for this are right around 123.6 with 200 step motor at 16x microstepping.

BuchnerB

over 9 years

I just installed V3. It is working but I need to adjust parameters. Flow rate seems to be a little less per turn an I think the retraction needs to change. Anybody have good parameters for the geared extruder?

chris25b

over 9 years

yea parts back in stock, can't wait to try it out.

ecodad

over 9 years

will this work on a Printrbot Jr. v2?

tjb1

over 9 years

WyldeRhide - That is correct, it should allow you to print everything without any support.

WyldeRhide

over 9 years

The v0.02.1 model has screw-holes that are closed off. Is this intentional (and we're supposed to drill them out)?

nhfoley

over 9 years

@Helmi Not as good as source but I modded this design to work with a bowden tube & posted a STEP file of the modified version here: <a target="_blank" rel="nofollow" href="https://www.youmagine.com/designs/printrbot-gear-head-extruder-bowden-mount">https://www.youmagine.com/designs/printrbot-gear-head-extruder-bowden-mount</a> It's a messy STEP since I converted it back from the STLs here, but it is usable.

Helmi

over 9 years

Any chance to get some source files or specs (like distances etc) for modifications (different hotends/mounts)?

techno_hippieGuy

over 9 years

Can you post a materials list? Your site is out of these, and I'd like to try modifiying it to work in a dual hotend bowden/direct hybrid for my Robo3D, but need the specs of the gears and hardware so I can order.

AmazingSpanoMan

over 9 years

Never mind. Figured it out. lol It was a late night

AmazingSpanoMan

over 9 years

Ok so how does this cone together? Cant figure out what the 3rd bearing is for and what screws to use where. Lol

printrbot

over 9 years

Just released v0.02

TomG

over 9 years

I had some problems with the bridges, especially the first layer of the hole where the back plate seats to the motor. I ended up with some hard curly strings instead of a smooth layer, but I can easily clip/sand that out. The bigger problem I have is my first print produced holes that were slightly too small. I'm planning to try again (and again and again ;) until I can get that sorted out.

FenianEMT

over 9 years

TomG, how were you able to print without support? I tried (without having looked closely enough at the model), and it failed miserably due to the holes in what would otherwise have been bridges. I'm trying to figure out how it would even be possible to print this without support.

MichaelD3D

over 9 years

Which printrbots does this upgrade work on? Will it work on my LC v2? I have the appropriate upgrade for the Alu Extruder

TomG

over 9 years

I printed it at 0.2mm and 40% infill. No supports. The bridging is tough to get right, I might try to reprint to see if I can get an even cleaner result.

AmazingSpanoMan

over 9 years

Any print setting suggestions? It looks like this will need supports?

cyclone

over 9 years

Since there is no pinch spring, Is there no issue with filament size being slightly larger or smaller than 1.75?