SoliForum - 3D Printing Community — LEAD SCREW DESIGN FOR HIGH RESOLUTION

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T22:24:42Z

I got curious when I read about leapfrog Xeed 3D printer having 20 micron layer resolution. Checkout the link: http://www.lpfrg.com/en/blog/xeed-10-mi … t-quality/

I am really curious how they achieved it in FDM style.

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T22:03:44Z

A completely different printing process utilizing an entirely different material. 20 microns is simply beyond and realistic expectations of any FDM style printer. Achieving 20 micron precision of motion is difficult enough. Getting extruded plastic to comply is in my opinion, not a real possibility. The bigger question is, what are you planning to print that needs that level of precision?

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T21:52:52Z

So what modifications need to be done for lets say 20micron Z movement of bed?

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T21:45:22Z

Just because the bed is capable of moving at that resolution, doesn't mean the rest of the system is capable of utilizing it. The biggest drawback is the molten oozing plastics ability to comply with that degree of precision.

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T21:38:39Z

I agree we cannot edit XY resolution, Pirvan. By 8 steps do you mean 8 microsteps of the stepper? And why are you using a ball screw? A normal acme screw would not give that accuracy? And you mentioned the wide trace of the nozzle, what about the Z trace? That depends on the speed only right? So if we need to go for very low Z steps, we need to increase the speed of nozzle movement? Some commercial printers advertise 10 micron and 20 micron layer resolution as their unique feature. But then why do most printers use only 100microns when a small change in lead screw design can achieve much finer resolution?

Re: LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T19:25:55Z

You do realize that this will only "improve" your vertical resolution, right?

Your X/Y resolution will still be governed by the positional accuracy of your printer, and mostly by the diameter of the nozzle. A .35mm nozzle will output a .42mm wide trace. Therefore a single dot/pixel or line can't be any smaller than 420microns (21x larger than your layer height).

Having said that, I have a SF1204 ballscrew on my Sd3, and I can move it in 10 micron increments (8 steps).

LEAD SCREW DESIGN FOR HIGH RESOLUTION

2015-12-25T15:53:32Z

HOW SHOULD WE SELECT THE LEAD SCREW 'DIAMETER', 'LEAD' AND 'PITCH' IF WE WANT TO ACHIEVE A LAYER ACCURACY OF AROUND 20 MICRONS?