Poor Man's Digital Dentist Core XY build

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Qdeathstar
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Poor Man's Digital Dentist Core XY build

Postby Qdeathstar » Sun May 07, 2017 9:10 pm

Hi guys.

I'm not putting MR. Green Down, or sending him out to smell the roses, but i am building an new 3D printer!

I am working on a coreXY machine with an approximate build platform of 18" cube.

My design is inspired and almost entirely coppied from The Digital Dentist's build over at RepRap.org. His printer is almost done, but I was so impressed with his build that I took at look at his pictures and I'm in the process of building an approximation.

He has access to a milling machine, and I don't, so had to make some sacrifices to account for this, but over all its looking good.

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I was able to finish a version of the effector mount. I haven't fully decided on my hotend it yet so there is definitely going to be changes.... im thinking about either dual e3dV6 or i've already a cyclops i modified to have water cooling. I want to do a direct drive (no bowden) system, however. I have might have some Nimble extruders for the cyclops, and if they get here and work that might be OK. The only issue is now i have a big printer and i really need a .8 nozzle or larger to make practical use of it and they are only available with e3d v6.

-Not bowden
-Dual Extrusion
-different nozzle sizes available

Would be my main criteria in that order. If anyone has any ideas on the front i'd appreciate it!


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The motor mount didn't have enough "play" to get it to where i need to be in order to make the belts parallel, which is a requirement for coreXY printers, so i've got another one printing down that shifts the upper square over. derp. You can also see where i've added some mechanical stops to prevent the rail from sliding off the guides. Had that happen to me yesterday. Not again! (not a big deal, the rails have ball bearing retainers).

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Thanks to The Digital Dentist for the idea of the belt mount.

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Overall, the belts look parallel, which is good news. I'm waiting on the slowboat to get here for the larger pullys for the idler bearings... only option was to get them on aliexpress and wait forever. Well, unless you wanted to pay $15each for them. I've got an old RAMBO board hanging around so once i get the motor spacers reprinted i might fire it up and see how she chootches!. I've made some hole in the effector mount to attach a spare linear rail to so i can try the pencil thing DD did. I think that is a great way to check for backlash/optimum speeds, since you can easily see the ripple. Though, i expect with the hotend attached you might have to run a bit slower because of the added mass.

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Glacian22
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Joined: Thu Apr 04, 2013 6:07 am
Location: Seattle

Re: Poor Man's Digital Dentist Core XY build

Postby Glacian22 » Sun May 07, 2017 9:49 pm

Looks good so far!


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