Re: Lead Screw usage for X and Y axes April 23, 2016 02:02PM |
Registered: 12 years ago Posts: 5,794 |
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tobben
Wow, thanks for all the response! You're right that a full realization of the mockup will be flimsy and fail in many ways. Constructing and measuring failure is what I do to learn.
I'm not trying to build a prototype that is a working printer, well designed working printers already exist and I have many of them. I'm trying to make as naïve a first prototype as I can, to be able to learn and measure exactly how much it fails. The question I ask myself when I start designing is "what do I wish would work?". Limiting work hours of over-engineering in this way allowed my previous project Clerck to go big fast. See blog for more Clerck.
Re: Lead Screw usage for X and Y axes April 23, 2016 02:35PM |
Registered: 8 years ago Posts: 10 |
Re: Lead Screw usage for X and Y axes April 24, 2016 05:30AM |
Registered: 11 years ago Posts: 401 |
Re: Lead Screw usage for X and Y axes April 24, 2016 09:19AM |
Registered: 8 years ago Posts: 10 |
Re: Lead Screw usage for X and Y axes May 05, 2016 05:29PM |
Registered: 10 years ago Posts: 109 |
Anonymous User
Re: Lead Screw usage for X and Y axes May 06, 2016 03:07AM |
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AquaticsLive
Have you made any headway on this, I have been working on mine for over a year swapping back and forth between belt drive and a SFU1204 ball screw installed for my X axis. Printer is a home built 450mm cubed usable size. It has been a super pain to get it setup the tolerances between the slides and the screw, they have to be perfect. You can tell when its not correct when the carriage travels to either end if the space isn't perfect the stepper has a hard time moving. I am using MassMind drivers LINK. 48VDC with Nema 23 motors
So one thing that has helped allot was gearing the stepper so you get more movement per rotation. So 1204 is 4mm per revolution, I doubled that with gearing for I get 8mm now. Max speed at 4mm was 40. So now I am 80, which is still allot slower than the 120 the belt drive can do.
So a couple ideas I still have on the plate is using two ball screws so I can get rid of the slides, really not sure if it will work but would be nice to lighten it up a little. I tried one slide and the ball screw and got some tilt deflection of the head.
I still want to try to gear it up more to see how fast I can get it, but that is more of a fun thing than useful. lol
Re: Lead Screw usage for X and Y axes May 06, 2016 08:04AM |
Registered: 12 years ago Posts: 5,794 |
Anonymous User
Re: Lead Screw usage for X and Y axes May 06, 2016 11:51AM |
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the_digital_dentist
While I agree that the frame needs to be rigid to gain maximum benefit from linear guides, they have advantages that apply regardless of frame rigidity. For one thing, you can usually use just one linear guide in the X axis and make it more compact. It is very easy to design an extruder carriage to fit the bearing block.
....
Re: Lead Screw usage for X and Y axes May 06, 2016 12:56PM |
Registered: 10 years ago Posts: 9 |
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MKSA
OK but I am speaking about the average Joe, who seems to have no understanding about the fundamentals and expect that these will make miracle.
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MKSA
You just mentioned "degree of freedom", how many do you think understand what it means ?
Re: Lead Screw usage for X and Y axes May 09, 2016 05:03AM |
Registered: 9 years ago Posts: 312 |
Re: Lead Screw usage for X and Y axes September 01, 2016 06:30PM |
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Re: Lead Screw usage for X and Y axes September 02, 2016 03:29AM |
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Re: Lead Screw usage for X and Y axes September 02, 2016 02:21PM |
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Re: Lead Screw usage for X and Y axes September 03, 2016 02:57PM |
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Re: Lead Screw usage for X and Y axes September 04, 2016 03:12AM |
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Re: Lead Screw usage for X and Y axes September 04, 2016 03:25AM |
Registered: 10 years ago Posts: 14,685 |
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tobben
Thats interesting. What are the specs of the two different stepper motors (the Motech and the Folgertech one)?
I've noticed surprisingly high inductance in some shorter Folgertech 34mm Nema 17 motors before (see comments 14, 15 and 16 here: [opensourceecology.org]).
Are the axes much more noisy than belt-driven axes?
Re: Lead Screw usage for X and Y axes September 04, 2016 06:24AM |
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Re: Lead Screw usage for X and Y axes September 04, 2016 08:50AM |
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Re: Lead Screw usage for X and Y axes September 04, 2016 03:15PM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 02:55AM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 03:34AM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 07:53AM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 10:46AM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 12:09PM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 03:01PM |
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Re: Lead Screw usage for X and Y axes September 05, 2016 03:31PM |
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Re: Lead Screw usage for X and Y axes September 06, 2016 04:00AM |
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Re: Lead Screw usage for X and Y axes September 06, 2016 05:58AM |
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Re: Lead Screw usage for X and Y axes September 17, 2016 02:48PM |
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Re: Lead Screw usage for X and Y axes September 17, 2016 02:57PM |
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