Puppy cart prototype 1
by caser, published
Problems I'm running into:
- I printed the draft in low quality, so I don't know how much of the structural problems have to do with the low quality, and how much is design flaw. (The rounded bar where the dog's legs can rest, connecting both halves of the cart are particularly flimsy.)
- The framing is 1 cm in width, which will have to be widened at least where the wheel axles go, if not around the entire frame.
- The cart is not adjustable, and is almost at the maximum size for printing. In order to make the frame work for the puppy as it grows larger, I will need to be able to create smaller, assemble-able parts to be printed individually.
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I love cats but dogs (specially puppies) are OK too! It's nice what you're doing.
I'm still a complete newbie with 3D printing but I'm pretty experienced with FreeCAD and CAD in general. If you do give FreeCAD a shot, don't hesitate to ask me questions, or register to the FreeCAD forum (my nick there is normandc). I know it can be intimidating at first.
Sketchup is good for getting your feet wet, but in my opinion it's better suited for building a shed than designing stuff for a 3d printer. A CAD program is what you want for precision parts that will be fitting together (meanwhile Blender is best for sculptures and organic shapes).
Thread rod shouldn't add too much to the budget or weight as long as you stick with 5/16" diameter. That should be plenty rigid for a puppy. Go check out the display at your local big box hardware store. They have hollow tubes and aluminum rods too that might give you some inspiration.
P.S. My inspiration for trying to do this myself in the first place came from "The Rolling Dog Project" (https://www.facebook.com/photo... who designs carts for dogs out of PVC pipe. I may end up using his design, but since these puppies are so little, and since I'm learning 3D design anyway, I thought I'd give this a try.
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