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DSH Alternative Extruder

I don't know if this is better in the DSH sub forum or here, but as I got the DSH with my Proforge 3, here we are...

I understand why the DSH has the cheap plastic arm extruders; we are consumers, and for most, cost is king... I bought it, expecting these. But before I start calibrating e-steps and running anything, I want something a little nicer.

Does anyone have a suggestion on a nice, dual gear alternative? Preferably something like a BMG, or something that is mostly just a bolt-on swap? (I don't feel like custom designing a mount...)

7 comments

7 Comments

Dries Douterloigne

Jun 29, 2022

Just, tried with a BMG clone I have laying around and first test are great too. My goal is still trying to make it work with most parts stock

Peterg

Jun 28, 2022

Wow, that is super cool! Thanks for sharing!! Please share your experiences, when you do get the mosquitos in and tested! I'm going to start saving up some $$. 🙂

Peterg

Jun 27, 2022

Wow, that sounds great! Would you be willing to share the design? I'd love to hear how you make out switching with magnums... I've considered moving to them a few times, for my bigger machine. But without switching/lifting ability, I'm not willing to invest the money...

Thanks for the tip on switching the wire! I was thinking I'd have to do that in the config or GCode, but moving the wire would be infinitely easier!

David Ewen

Jun 27, 2022

Replying to

@Peterg

Hi Peter,

Here's the files. I design in Fusion 360, so I've included the Fusion and STEP files.

NOTE: the tip of the nozzle is 1.3mm closer to the bed, so you will need to adjust the Probe and the Ooze shields accordingly.

Ok. I'm unable to upload the files directly to the forum, so here is a link to the model on GrabCAD. https://grabcad.com/library/proforge3-dsh-for-mosquito-hot-end-1

I printed with the rocker with ASA+CF laying flat on the back so that the arms have the greatest strength. I have tested the rocker on my printer and it works great. I do not have the Mosquito hot ends yet. They will be here the end of this week. I have a spare heatsink, so confirmed fit to Rocker. You will need (4) M2 x 30 screws and M2 nuts to mount the Mosquito with 20mm fan. You will also need (2) 20mm fans. The stock fans are 30mm, so will not work with the Mosquito hot ends.

Now, if I can get the frame in all 40/20 extrusion and the X-Axis in 20/20 extrusion, get the machine squared up, I think I can get speeds up to 100-120mm/s. The QR extruders push some with some serious force, and the Mosquito hot ends can certainly handle the flow. What I'm not sure of is how much extra ghosting/ringing those speeds will add to prints, but jerk control might help a bit.

David Ewen

Jun 25, 2022

@Peterg

I just installed Bondtech QR extruders.

They work great, but the hot ends can't keep up. They consistently clog around 2mm layer height. And that is just with PLA.

Note: You'll need to order the standard and mirrored version. Then on the right side you will need to swap the wires to get it to run in the correct direction. I swapped the Red and Blue wires.

I have designed and printed a switching arm for Slice Engineering Mosquito (Magnum) hot ends. I just ordered the hot ends today. These things are fantastic. I am using them on my Prusa MK3s and my Ender 6. Both with Bondtech direct drive extruders.

Peterg

Mar 03, 2022

I actually have that one on an ender 3, and it is decent, with some modification... The secondary extruder gear doesn't have a bushing, so it grinds out the lower portion of the aluminum tensioner, and you have to replace it. I machined down the gear to fit a steel washer in between and that has fixed it, but I don't know that the cost savings is worth the effort.

I'm thinking I may just buy two BMG extruders, but I'm wondering if I should do standard+mirrored, or just two standard.

I haven't gotten to this part of the assembly yet, so I'll probably wait until than to decide.

Akisame -

Mar 03, 2022

What about the "3Dman Dual Gear Extruder, Works with Creality Ender 3 CR10 CR-10 Pro CR-10S Tornado Upgraded Aluminum Drive Feed for 3D Printer 1.75mm Filament"?

It is 19 bucks and all metal.

Unfortunately, I can't tell if it is a quick swap because my printer is in customs limbo but it seems to be very simple