This is my latest design and build 3-D printer May 27, 2014 04:20PM |
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Re: This is my latest design and build 3-D printer May 27, 2014 08:49PM |
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Re: This is my latest design and build 3-D printer May 28, 2014 08:27AM |
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in my opinion the extruder is the most important part of 3-D printer needs to be tremendously reliable again this is a smaller version of one I built my large machine. It uses the same drive system which is a serrated drive wheel off a mig welder it's over an inch in diameter and that's driven by 100 to 1 gear motor. I don't seem to have any problems by letting it overhang that much I could've done it the other way around so that the hot end was feeding off the backside but I didn't like the spring pintch system the that way. Plus something I definitely wanted was my design of the sliding extruder only held down by gravity it slides on a little ball slide and the screw you see on top is for adjusting height. The large diameter of the drive wheel is the key many more teeth are engaged in the filament at a time if you click on the last picture it should be a link to a video the X carriage and the whole machine is very rigid and takes the overhang well . 90% of the materials and the components I had on hand I had the 8020 and the aluminum plate three of the four motors and the linear rails and bearings I bought the Arduino ramps LCD and E 3-D hot end one motor and two of the belts so I basically designed around what I had the XY and Z are 23'sQuote
jamesdanielv
how do you keep the chatter down on the z axis. you want the nozzle to be as near the center of z stage as possible. perhaps move the nozzle in another inch?
Re: This is my latest design and build 3-D printer May 29, 2014 02:29AM |
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Re: This is my latest design and build 3-D printer May 29, 2014 06:26AM |
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Re: This is my latest design and build 3-D printer May 30, 2014 03:57PM |
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Re: This is my latest design and build 3-D printer May 31, 2014 09:11AM |
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Re: This is my latest design and build 3-D printer May 31, 2014 03:59PM |
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Re: This is my latest design and build 3-D printer May 31, 2014 05:29PM |
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Re: This is my latest design and build 3-D printer May 31, 2014 06:40PM |
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this is where gearing comes in I personally run 100 to 1 gear motor the drive wheel is approximately 26 mm diameter. With 16 micro step it's 3200 steps per millimeter very accurate. And like I said many times before you have the picture it in your mind little teeth in the small diameter it's not a good scenario but even the Pro machines use a small drive wheel which I think is wrong the more teeth engaging the better you can do anything you want with gearing and get whatever resolution you wantQuote
iquizzle
The amount of filament that gets driven per revolution is equal to the circumference of the drive gear... so for a smaller diameter drive gear, your motor doesn't have to work as hard to push the filament. I think this is probably more important for a bowden setup (due to the extra friction from the tube) than non-bowden, which is why you are likely to be able to get away with a range of drive gear diameters.
If it works, go with it. But I don't think this is a one size fits all situation.
Re: This is my latest design and build 3-D printer May 31, 2014 07:19PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 10:35AM |
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Re: This is my latest design and build 3-D printer June 03, 2014 10:52AM |
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Re: This is my latest design and build 3-D printer June 03, 2014 02:50PM |
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I just did a Dragon I got off thingaverse in ABS.not that high of a resolution I used a .2985 layer height came out very good little cleanup and I just sprayed some clear lacquer on it now when it's dry post a picture of it was a six-hour print when I was cleaning it up I did snap the tale myself not when it was printing but while I was cleaningQuote
MrDoctorDIV
You've shown your printer and extruder, but I don't believe I've seen prints you've done.
Re: This is my latest design and build 3-D printer June 03, 2014 04:39PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 05:31PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:02PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:08PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:23PM |
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sorry I have thrown a little 20 mm test cubes away this is how you set the machine up yes it produces accurate straight walls if you think printing a square cube is easier than printing something like the Dragon I just printed your out of your mind if it's not set up exactly it will knock the legs off before they are attached to the body the tail will come out terribly never mind the wings I've done Stratis gliders which are difficult because there only one layer thick wings. I've done the screw cap Bottle test and multiple squares but obviously I didn't hold onto these. And the Yoda was printed on a larger machine that I made a couple years agoQuote
tkole
The yoda is definitely nice, but these objects don't give a good measure of a printer's capability in my opinion. I want to see an object with flat vertical faces and sharp corners. All of the curves and irregular borders mask the limitations of the printer.
Re: This is my latest design and build 3-D printer June 03, 2014 06:27PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:31PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:37PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 06:42PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 07:28PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 07:42PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 07:49PM |
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I got off thingaverse I don't remember what they called it something like a singing Dragon no supportsQuote
MrDoctorDIV
PLA vs ABS can sometimes tell a different story. I am exclusively PLA, but upon certain need for one customer I will be getting another material, not sure yet which one.
Where's the file for the dragon? I'd love to print that out for test. Did you print with supports?
My speed was 60mm/s, acceleration was 5000, and I think my firmware has a jerk of 20, but I can't remember since I just left the default value for that one, I've had no bumpy curves and therefore no need to change it.
Re: This is my latest design and build 3-D printer June 03, 2014 08:22PM |
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Re: This is my latest design and build 3-D printer June 03, 2014 09:04PM |
Registered: 11 years ago Posts: 474 |
I agree I think most problems with the reprap printers is exactly what you said throwing the mass around that's why you have to build the system sturdy enough to take the acceleration and deceleration of the X or light enough which I don't agree with because the extruder and hot end is the most important thing I don't like Bowden personally. I think The main problem with most reprap designs is z guide system and the frame. This is another picture that people hate to see here this was done on my large floorstanding machine I made a couple years ago very strong very accurate all ballscrews. I did print one of these these on my new little machine with belts and it didn't come out anywhere near as good as this but still better than most i gave it away to somebody that was at my house the picture is from the large machine URL=http://s1333.photobucket.com/user/richard_nelson1/media/IMG_7886_zps7e95bf6e.jpg.html] [/URL]my large machine with ballscrews look at the layersQuote
tkole
It's not so much for the hole as it is for the inertia check. You can unmask many acceleration issues by throwing a hole in the path of a vertical wall. With the mass of your xcarriage and bed, I imagine printing this piece would be very telling. I'm not sure why PLA vs. ABS has anything to do with the discussion.
Re: This is my latest design and build 3-D printer June 04, 2014 08:18AM |
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Re: This is my latest design and build 3-D printer June 04, 2014 02:02PM |
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