Delta printer November 23, 2016 08:42AM |
Registered: 7 years ago Posts: 6 |
Re: Delta printer November 23, 2016 11:38AM |
Registered: 9 years ago Posts: 483 |
Re: Delta printer November 23, 2016 05:00PM |
Registered: 10 years ago Posts: 14,672 |
Re: Delta printer November 24, 2016 01:45AM |
Registered: 7 years ago Posts: 6 |
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dc42
If you mean 300mm printable diameter, that happens to be the size of my 1m Kossel. Horizontals are 355mm and rods are 350mm between bearing centres. See the link to my blog in my signature for more build details. As etfrench says, the dimensions you need will depends on the design details of your printer, such as whether you mind the bed extending outside the horizontals (mine does) and how large the effector is.
Re: Delta printer November 24, 2016 01:45AM |
Registered: 7 years ago Posts: 6 |
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etfrench
It will depend on the design. You can put the bed entirely inside the horizontals or it can extend outside. This will determine where the towers are placed and the length of the arms. It's pretty simple geometry to lay it out. Basic formula for arm length is 20 degrees to reach the edge of the print area and 60 degrees with the effector centered.
Re: Delta printer December 03, 2016 10:08AM |
Registered: 7 years ago Posts: 6 |
Re: Delta printer December 03, 2016 02:39PM |
Registered: 9 years ago Posts: 483 |
Re: Delta printer December 03, 2016 02:49PM |
Registered: 12 years ago Posts: 1,450 |
Re: Delta printer December 06, 2016 06:40AM |
Registered: 8 years ago Posts: 356 |
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leadinglights
The thing about scaling is that you often need to increase some parts much more than you may think. For example, many small printers have a working volume of about 200mm wide but 200mm deep by 200mm high and they use 8mm smooth rods - the individual errors over this size tend to be a bit less than 0.1mm and they add up to about 0.1mm or thereabouts with care. If however you wanted to double the size of everything then you would need to use shafts of 16mm and this is the bitter point -- the errors would also be twice as big at about 0.2mm. To get back to the 0.1mm figure you would need shafts and other load bearing bits about double as big again, that is 32mm shafts. The above applies to cartesian printers admittedly, but the forces are the same in delta printers. so you will be better off by squaring the increase so even 50% bigger will need 125% thicker bits.
Re: Delta printer December 06, 2016 04:07PM |
Registered: 10 years ago Posts: 14,672 |
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talha10com
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dc42
If you mean 300mm printable diameter, that happens to be the size of my 1m Kossel. Horizontals are 355mm and rods are 350mm between bearing centres. See the link to my blog in my signature for more build details. As etfrench says, the dimensions you need will depends on the design details of your printer, such as whether you mind the bed extending outside the horizontals (mine does) and how large the effector is.
can you please give the details for dimensioning? I'm a novice on this subject
Re: Delta printer December 07, 2016 04:52AM |
Registered: 7 years ago Posts: 6 |
Re: Delta printer December 07, 2016 07:03AM |
Registered: 10 years ago Posts: 14,672 |
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talha10com
there are too many threads can you throw a link to access?
Re: Delta printer December 13, 2016 01:35PM |
Registered: 8 years ago Posts: 601 |
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GroupB
Quote
leadinglights
The thing about scaling is that you often need to increase some parts much more than you may think. For example, many small printers have a working volume of about 200mm wide but 200mm deep by 200mm high and they use 8mm smooth rods - the individual errors over this size tend to be a bit less than 0.1mm and they add up to about 0.1mm or thereabouts with care. If however you wanted to double the size of everything then you would need to use shafts of 16mm and this is the bitter point -- the errors would also be twice as big at about 0.2mm. To get back to the 0.1mm figure you would need shafts and other load bearing bits about double as big again, that is 32mm shafts. The above applies to cartesian printers admittedly, but the forces are the same in delta printers. so you will be better off by squaring the increase so even 50% bigger will need 125% thicker bits.
This do not apply to delta, he want a bigger bed, he only need to scale the bottom and top extrusion in length. Even if he want to scale the height, you just use 20X40 tower for around 1 -1.5 meter tall and I say 40X40 for more than 1.5 meter, then no one use linear rod in delta anymore, you use MGN rail or if its really tall Vslot carrier might be better price/length. A larger delta do not throw more error than a small one, its all about the quality or part and build.