Hi Less, good to hear you are back! Hopefully it was nothing serious while you were gone.
Your project looks really good! Curious to see what Ivan will grow into!
Hi Sander! One "s" in "Les" please. The hospital stay was somewhat serious, but I feel 100% better now. I am currently making adjustments and some design changes to Ivan's planetary gearbox. It is thinner now which will improve print times. The tougher part will be to lower print times and improve printability of the arm pieces. Thanks for your interest!
Les
Edited by GuestI'm finally able to print out Ivan's parts and if you'll reference this forum thread:
forum thread on PETG printing and heat transfer
you'll understand why the big base part has a poor surface yet the gears are fine. Anyway, I have things tuned up right now. The design is also evolving as I go, with the gears much thinner and added posts instead of hollow gear mounts, etc.
Les
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Seems like different nozzles made a big difference! Curious to see how it will continue. Did you also use PetG as that thread you refer to, or is this PLA?
If PetG, why did you choose that over PLA?
Seems like different nozzles made a big difference! :)Curious to see how it will continue. Did you also use PetG as that thread you refer to, or is this PLA?
If PetG, why did you choose that over PLA?
yes, the nozzles made all the difference. I choose PETG because of its higher temperature coefficient. I want to use a filament that won't melt in a hot car.
Les
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LesHall 95
Here in this animated GIF image (click for animation) we see the drastic evolution of Ivan the robot arm that occurred yesterday. When I realized that putting the motors in-line with belt/chain drive meant that the planetary gear joints could be reduced to simple bearing joints, this was the result.
Ivan now accurately touches the magenta ball through -60 to 120 degrees at a radius of one to three section lengths, which I find to be quite a capable result for such a small amount of algebra and trig. He's also low in part count (about a dozen parts total) and both quick (relatively) and easy in printability. I hope you like my latest Ivolution!
Les
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