Does (bed) size matter? November 03, 2015 06:44PM |
Registered: 8 years ago Posts: 67 |
Re: Does (bed) size matter? November 03, 2015 07:23PM |
Registered: 10 years ago Posts: 140 |
Re: Does (bed) size matter? November 04, 2015 03:43AM |
Registered: 8 years ago Posts: 67 |
I take it you have a delta printer then. These seem to be easier to scale, right?Quote
3DRapidClone
My printer is 14" diameter and 18" tall in build volume which is just about right for me.
I'm not too concerned about noise, as I will be using the printer in my workshop (detached garage), but the weight might be an issue, though sagging under load might be a bigger oneQuote
3DRapidClone
12mm rods will be pretty heavy, and with the linear rod bearings you will get a lot of ringing.
Re: Does (bed) size matter? November 04, 2015 04:30AM |
Registered: 8 years ago Posts: 5,232 |
Re: Does (bed) size matter? November 04, 2015 07:40AM |
Registered: 11 years ago Posts: 5,780 |
Re: Does (bed) size matter? November 04, 2015 08:54AM |
Registered: 9 years ago Posts: 517 |
Re: Does (bed) size matter? November 04, 2015 10:55AM |
Registered: 10 years ago Posts: 140 |
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Dalius98
That's quite similar to what I've been thinking recently - building a smaller printer is just easier...
They are much easier to build.
I take it you have a delta printer then. These seem to be easier to scale, right?Quote
3DRapidClone
My printer is 14" diameter and 18" tall in build volume which is just about right for me.
About the build volume... May I ask how often do you need to print something close to 12"? (and what kind of things are these big prints if that's not a secret?)
It is in fact a delta printer. They are easier to scale in the Z as you only have to replace the 3 linear rails and belts. For X and Y you need to replace 9 extrusions and the 6 arms.
For a cartesian, you need to replace 4 vertical extrusions for Z, use a longer leadscrew and replace at least 2 longer linear rods.
For X and Y, you need to replace the belts, and 4 linear rods and 8 extrusions, then you must go to a triple leadscrew for any decent size as the cantilever style bed will not work, so 2 more lead screws, and bottom belt which has to be a closed loop belt and 3 pulleys, with a bearing tensioner below as well.
Also, I print a lot of things in batches, so the space is really nice and I print 1:1 scale cosplay items. You'd be surprised how much money they can go for especially for cosplayers for a very intricate pieces.
I'm not too concerned about noise, as I will be using the printer in my workshop (detached garage), but the weight might be an issue, though sagging under load might be a bigger oneQuote
3DRapidClone
12mm rods will be pretty heavy, and with the linear rod bearings you will get a lot of ringing.
As far as heated chamber goes, I've always thought I'll be encasing the printer with something, but never actually considered what impact that might have on the components... The hotend would probably need water cooling, or at least a flow of fresh air from the outside, and the belts... well, I have no idea how would they react...
Re: Does (bed) size matter? November 04, 2015 12:22PM |
Registered: 8 years ago Posts: 67 |
ah, I remember seeing this problem discussed before, didn't realize it's called ringing... Unstable or wobbling Z axis on a CoreXY would cause that too, right?Quote
3DRapidClone
Ringing doesn't refer to noise, but rather the memory that polymeric materials have where your machines vibrations and momentum due to high acceleration leave ringing ripples in your print, mostly when you print holes in the Z direction.
A "regular" cartesian, or a corexy cartesian?Quote
the_digital_dentist
I was using 1/2" end supported guide rails in my 12 x 12 x 11 build volume machine and ultimately swapped them out for fully supported linear guides. The machine is so stable now that I recently adjusted the level/zero for the first time in 6 months. If I were designing another printer today, I would not consider using anything else.
See? this guy has the right ideaQuote
ElmoC
It's not the size that matters, but how you use it.
Re: Does (bed) size matter? November 04, 2015 01:58PM |
Registered: 10 years ago Posts: 140 |
Re: Does (bed) size matter? November 04, 2015 03:51PM |
Registered: 11 years ago Posts: 5,780 |
Re: Does (bed) size matter? November 04, 2015 04:22PM |
Registered: 8 years ago Posts: 67 |
Ah, stupid me, somehow didn't see that... tried pretty hard to find it by looking at your recent postsQuote
the_digital_dentist
My machine is a "regular" cartesian- see the link in my sig, below.
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ElmoC
Have you looked at the designs on openbuilds.com?
Re: Does (bed) size matter? November 04, 2015 04:30PM |
Registered: 9 years ago Posts: 517 |