First printer build January 22, 2015 02:32PM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 22, 2015 03:50PM |
Registered: 9 years ago Posts: 1,159 |
Quote
mrn26
hello
I'm building my first 3d printer.
I'm using a arduino uno running teacup firmware
The question I had was regarding phase current for my stepper motors. How much current/torque do I really need for a printer?
The motors I found run at 4.4V and have per phase current draw of 2A resulting In holding power of 63 oz.
The drivers I found are: (Geeetech Stepper driver Pololu DRV8825 & heatsink for RAMPS1.4 Sanguinololu) they have a 2A max output and 1.5A output without cooling.
So would this setup be able to produce a decent 3d printer?
I know the torque depends on what kind of drive system I'm using, either a belt or screw but I'm not sure yet.
I'm also worried about being able to fit all four of the drivers on the Uno, but It's possible with easy drivers
Re: First printer build January 22, 2015 04:43PM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 23, 2015 04:01AM |
Registered: 9 years ago Posts: 1,011 |
Re: First printer build January 24, 2015 12:47AM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 24, 2015 06:37AM |
Registered: 9 years ago Posts: 1,011 |
Re: First printer build January 24, 2015 09:34AM |
Registered: 9 years ago Posts: 119 |
I read, that sometimes it is pretty good to have the possibility to adjust both temperatures after the first 2-3 layers. So, yes, it would be advisable to have this option.Quote
mrn26
[...]The extruded heater and heat bed, I was thinking I could create some separate setup for that, since the just have to heat up and sit off at the correct temp. Or is that something that should be computer controlled? [...]
Re: First printer build January 24, 2015 11:29AM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 26, 2015 04:37AM |
Registered: 9 years ago Posts: 1,011 |
Re: First printer build January 26, 2015 10:08AM |
Registered: 11 years ago Posts: 5,780 |
Re: First printer build January 26, 2015 01:44PM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 26, 2015 06:15PM |
Registered: 9 years ago Posts: 1,011 |
Re: First printer build January 26, 2015 08:07PM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 27, 2015 04:19AM |
Registered: 9 years ago Posts: 1,011 |
Re: First printer build January 27, 2015 11:09AM |
Registered: 11 years ago Posts: 5,780 |
Quote
Zavashier
The digital dentist your printer represents one vision of what a good printer must be. In many ways you're right, and your philosophy about machines argues. It's easy to estimate the cost of your printer, it's realy not the same budget compare to $300 repraps. Compared to yours, some printers will print perfectly for a small part of your overall budget. Heavy structures needs powerfull motors and so on, with an expensive bill at the end.
IMHO; a 3D printer don't need to be as heavy as a CNC mill because it won't have to stand the same forces, like a laser by the way. There's some vibrations issues to manage, but nothing comparable to a CNC mill. In 3D printing velocity is important. Even with large servomotors you won't have the same velocity on a heavy machine. If you compare a real plane to a RC plane, both fly pretty well but the RC one accelerate and change direction faster, because of its dimensions and light weight. I totaly agree with you than ultralight components brings another issues. That's why a new machine design must be studied with a lot of calculations around speed and components. All must match together, neifher too much or too little.
According you may have the budget to build a machine like yours, you must have access to a pretty well equiped workshop and be skilled enough to manage the whole project. Don't you think the goal is too high for a beginer with maybe no print experience ? Designing a fully functionnal machine, that works first time, anytime, is an engineer team work. And it's a long way through. Maybe it's easyer to follow the BOM of a good reprap already engineered and working worldwide. What do you think ?
Re: First printer build January 27, 2015 11:18AM |
Registered: 9 years ago Posts: 12 |
Re: First printer build January 27, 2015 02:08PM |
Registered: 9 years ago Posts: 1,011 |
Hmmm. Very difficult question. Says it depends under which star you're born. Sometimes the cheapest works as good as the expensive ones, sometimes no. There's great chinese brands too : Leadshine, for example.Quote
mrn26
Zavasheir: so the Chinese clones on eBay are bad products then?
Re: First printer build January 27, 2015 03:01PM |
Registered: 9 years ago Posts: 12 |