Delta-Six

Here is a super rigid design for a Delta Printer frame using V-Slot 20X40.
I've been working on variations of this design on and off for ~1 year, but I'm finally posting this, because I think its actually 'done'. I like the name, (and its nearly V6 of the design anyway ) so I'm going to call this Delta-Six. I was originally looking for an alternative to an expensive linear rail based Delta, and after many other (successful, but floppy) attempts, I think 20X40 Vslot provides just that, AND its solid as as a rock.

I'll post more files as I'm satisfied with them, but 6 of these "vertices" + 3 1500mm 20X40 V-slot extrusions and some M5 hardware will get you a very reasonable start on creating a delta printer.

*Edit* - I added files for carriages, idler end plates, and an effector. The carriages are based around using 3" X 1/8" aluminum flat stock (available at most local hardware stores). Use the included template file to punch pilot holes for some 9/32" holes. (9/32" matches the size of the Openbuilds eccentric spacers) I didn't end up actually using the eccentric spacers, but the extra slop will also give you the necessary room to snug up the mini-v wheels.

Sadly, this design requires that you already have access to a 3D printer. I've uploaded the source OpenSCAD files if anyone wants to improve or alter the design. Please let me know if you do, so I get to see what you make.

The design currently supports the following:

• Nema17 motors bolted directly to the frame.
• Endstops using standard micro switches
• Running power/signal wires up/down the frame in the V-Slot channels
• Idler bearings for belt or string drive.
• Built in belt/string tension mechanism using m3 hardware

-Sage


Build It:

1. Decide how big you want your Delta Printer to be
   1. Based on that calculate the length of your shot triangle sides.
   2. This is likely ~300mm-400mm
2. Use a chop saw to cut 2 short sides (again ~300) from each 1500mm 20X40 extrusion. For a total of 6 short, and 3 long segments.
   1. The exact measurement here isn't critical, but you do want all the sections to be EXACTLY the same length when your done.
3. Verify that the 3 remaining long sides are also identical in length. If not you have done something wrong, and you will be ordering more V-Slot stock from Mark...
4. Use the M5 hardware and T-nuts to bolt everything together.
   1. Once you start putting things together it will be evident that there is a specific order things should be done, or you will have a hard time getting that last vertex in the triangle...
   2. Hint - put all the hardware in place first, then simultaneously slide 3 short sections into 3 verts and form one of the upper/lower triangles. Don't torque down the long M5 bolts!
      
   3. Now connect both small triangles with the longer V-Slot sections and torque down all the bolts.
5. The frame is now done. Pick your favorite Delta electronics setup, and end effector/hot end.
6. I'll post the carriage design I'm currently using shortly, but its nothing special.
   1. Essentially mini v-wheels sandwiched between two aluminum plates, with a printed belt connector and arm connection points.

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