Beginner's questions about a custom delta design March 21, 2018 04:20PM |
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Re: Beginner's questions about a custom delta design March 21, 2018 06:02PM |
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Quote
dc42
Steel core belts will fracture if you used them with the small (16 or 20 tooth) pulleys
Re: Beginner's questions about a custom delta design March 21, 2018 06:07PM |
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Re: Beginner's questions about a custom delta design March 25, 2018 03:34AM |
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hercek
The ball joints in the video SUCK BIG TIME!!!
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Re: Beginner's questions about a custom delta design March 27, 2018 03:02PM |
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How can it be achieved a diameter of 270mm, when there seems to be a limitation for a maximum 253mm? Just to be clear, I am not trying to be nitpicking or pedantic here. All I want is to understand how to calculate the limits, and I am asking this to be sure that I am not missing something.Quote
dc42
I suggest you choose a smaller printing radius, to avoid adding too much extra mass to the rods. It looks like you are using Traxxas rod ends, so the overall rod length between bearing centres will be around 330mm. With that length, I think you should be able to achieve a 270mm print diameter if you design the rest of the machine carefully.
Re: Beginner's questions about a custom delta design March 27, 2018 07:09PM |
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Quote
RoGeorge
3. The next limitation is not so obvious, and is given by the ball joint's maximum allowed angle. For me, it was a surprise how small this angle is, about 45* (or +/- 22.5 degrees around the normal position) for a Traxxas like ball-joint. Some metal only ball joints have even smaller angle, like +/-15* only.
Now, let's make a rough approximation. If the rod is 330mm and the maximum angle is 45*, this will give an isosceles triangle where the 3rd side is 253mm. Then, no matter what, the most far away points that can be reached by the printing nozzle must be somewhere between a circle of 253mm diameter.