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Discussion in 'DrawBot' started by David Bunch, Dec 25, 2019.
To build a simple EggBot
David Bunch published a new build:
Read more about this build...
That looks cool. I had some 3D printed egg holders on mine, but I switched to these cabinet bumpers and I like them better. They seem to hold the spheres more securely. Everbilt 7/8 in. Clear Heavy-Duty Anti-Skid Bumper Pads (4-Pack)-804694 - The Home Depot
That looks like a good idea. Thanks. How did you attach them to each side? I might try printing the egg holders in TPU to see how they hold up. Seems like they may be sturdy enough to hold eggs.
I redid the 3 main mounts & only using 2-M5x12mm screws to hold them to the V-Slot. The egg motor mount might need 2 more screws, but will try it like this for 1st fit.
I like your TPU idea. I have just never tried printing with it, otherwise I would have tried the same thing you are planning. If I recall, I 3d printed some pieces with flat ends that I screwed those pieces onto.
I am finally getting back to this design. I had some printer problems to resolve before I could start printing this. I added most of the hardware to the design to pick up problems & did find a few interferences that were easy to resolve. The only other thing I will change are the endcaps. Think I will make them single endcaps similar to the way they are now. I want to make another variable adjustment for the distance between the V-Slots using a slotted hole on the one end. Think I am ready to print all the parts except the endcaps & the parts that hold the egg in place. Here is what it looks like now.
I have most of the parts printed now. I started looking at redoing the Pen motor mount to have the V-slot connection on the other side to make it easier to adjust that mount if the egg was in place. I didn't really like the way the mount would look, so am going to leave that as is for now. I was originally going to use an M8 rod for the idler connection, but then realized 5/16" (7.9375mm) bolts will work just as well & would be easier to design for. These bolts are used on the MPCNC machine. I made the egg holder on the idler side threaded to connect to that bolt which is less design than a set screw and the handle fits over the hex head. I did have to use the set screw connection on the motor side of the egg. It might be time to start putting this together. I still need a couple of short motor cables & P/S for the Uno.
Starting putting it together last night. Looks like I do not need a P/S for now. This LED strip I bought a while back & have not utuilized yet happens to have a 12v 3A Power supply that should work for this. I just need to buy a DC Power Jack Adapter Plug Female Pigtail to be able to connect it the 12v terminals on the CNC shield. Now I am looking for some short nema 17 cables. I am having a hard time finding any shorter than 1 meter. I could always cut them to size & splice the wires, but would prefer to just find some short ones. Seems like I saw some 400mm-500mm lengths, but can't find them now. 12" lengths is probably all I really need. I also need to find a spring which I think I have around here somewhere. I am considering redoing the idler mount to not use bearings & make the internal length the same as if the bearings were there. I will at least test print a part to see how good it feels. Would probably print that in PETG instead of the esun PLA+. I also have to print the egg mount for the motor side. Here are all the parts I have together so far. I will make the electronics case more enclosed after I see how all the connections fit together. I printed a plastic egg for reference.
I started looking at putting an order together for the electronics parts I still need & came across the CNC Shield V4 using the Arduino Nano. I read that grbl has some problems with this board, but that should not be relevant to using it with the eggduino firmware. I really like it being one board & it has a barrel jack on the board for plugging in the 12v power supply brick I am planning to use. With the CNC shield V3 that I have, I would need to get a DC powerjack pigtail to plug the power supply into the Shield. There is one by keyestudio that is less than $5 for just the board & another no name brand for a $1 or so less. I was looking on ebay or aliexpress for the board. They are also on Amazon, but more expensive there & probably the same board as the other places. I already have a nano board & some driver chips. I have seen where people have used the nano board with the eggduino, so that shouldn't be a problem. I also uploaded the firmware the nano I have to see if that worked ok & it did, but no further testing other than that yet. I will ponder it a day or so before ordering & to see if anyone comments pros or cons of this.
Would you share the files? I ordered a CNC shield v4 and have all the parts to build the eggbot but all the eggbots which are available now are not as good as yours! I hate printing a frame for 20h where the mounting holes are different for my board.
I uploaded a zip file of all the STL files as well as a sketchup file of the assembly to the Files and Drawings tab. The sketchup file should be useful to see how the parts go together. Let me know if I missed something. I finally received my CNC shield last week, so I will finish this as soon as I finish my current project.
Thanks for the files. I will give some feedback when it's finished.
Thanks for trying the design. Hope it works for you.
Dear David Bunch.
I have 3d Printed all the Parts with only 2 Print starts. This STL Files are Awesome. Thank you for this great work.
I wait 3 Weeks for delivery from the V-Slot Profil. Now I must see they deliverd the wrong one without "V-Slot". Now the 3D Printed Parts dont fit inside.
Can you please send me the STEP files from this Build ? Than i can remove the V Slot Marks @ the Parts and Print me new fast.
I cant Change STL files :-(.
Please help Me out with the STEP Files and SAVE MY EASTER. :-(
You are in luck. I had exported all my fusion 360 files to Step files last fall. I added the zip file VEggBot_StepFiles_210327.zip to the files area which has all the stp files. If you would prefer the fusion 360 files, I have them also. There might be a couple different versions of some of the parts, but did not take the time to sort them out. The file VEggBot v20 v1.stp is the complete assembly. Happy Easter
Your are my Hero. Thank you very much. You safe my Easter for me and my Familie.