JunkBot

JunkBot

Postby REPRAP SQUAD » 2014-Jan-Thu-14-Jan

I wanted to build a printer that could be built using primarily junk or recycled parts. I always caught myself seeing something that could be used to build a printer at a thrift store or on the side of the road. When I saw a friend of mine throwing away some outdoor solar lights I decided it was time to build the JunkBot. The stands that held up the outdoor solar lights would be perfect for a frame as they made up from were 25 millimeters square aluminum tubing. I started putting together anything I could find that I might be able to use to build the JunkBot.

I also didn't just want to be able to build a printer out of junk, I wanted to be able to build one that functioned great and looked even better. Making the parts from random different printers and things on thingiverse I printed out anything that would work with this setup. I am now getting fairly close to being finished as all I have left to do is setup the controller, do some wiring, set the rest of the y axis up and print a few more small parts. I probably have more usable junk than most when it comes to building a RepRap out of it but, if you be creative you can build one for a minimal expense.

I have recently decided to use a ramps 1.4 controller as a friend of mine is letting me borrow his spare in order to complete the build. I have yet to decide if we will do future iterations of this build but, I do know that we will be eventually setting it up with a dual extruder setup.

I have a complete build log that I started a few weeks or so ago on my site linked within my signature. I update it almost daily, so if you would like to check it out feel free.

****And yes that is a key. The purpose of it is to take the power supply off of standby in order to completely power up the printer. It was recycled off of an electric rascal skooter. Of course I had to add the open source color change key chain. It changes from black to a white semi clear above a certain temperature. ****
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Last edited by REPRAP SQUAD on 2014-Jan-Thu-14-Jan, edited 1 time in total.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Thu-14-Jan

I figured it would add a few more pictures so you can get a better idea of the build. The z and x axis are integrated, the x axis rods hold the z axis bearings in place. It also has an auto tensioner system for the z axis bearing system. That way rod sizes for the z axis can range from 8mm to about 14 plus mm with no modifications.

It also has a PTFE tube feed system that travels through the upper right vertex with quick disconnect plugs. The top mounted spool coaster is adjustable to fit any size spool. I have applied quite a few ideas that have been bouncing around in my head into this build. I decided to toss out conventional mechanical lever actuated homing switches for one's used on the enventorbot. They have worked great so far. I expect this project to be up and running within the next few weeks.

On the picture below you will also see a little LCD screen. The purpose of the screen is to log total print time. It was recycled off of a gas riding lawnmower. When the extruder turns on it starts to log time. This gives me an overall operational time of the printer. You can also buy these by themselves at any lawnmower store. They are very easy to install.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-00-Jan

A couple new pics as I finally got a decent camera for pictures.
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Re: JunkBot

Postby DJNOS1978 » 2014-Jan-Wed-08-Jan

This is very cool! Congratulations on your success and build.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-12-Jan

Thank you. I just hope it helps people that can't afford a RepRap. That way they can get into 3D printing and be well on their way to building whatever printer they would like. It just got picked up by a couple sites so I've been getting lots of emails about it.
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Re: JunkBot

Postby Lemm » 2014-Jan-Wed-14-Jan

REPRAP SQUAD wrote:I figured it would add a few more pictures so you can get a better idea of the build. The z and x axis are integrated, the x axis rods hold the z axis bearings in place. It also has an auto tensioner system for the z axis bearing system. That way rod sizes for the z axis can range from 8mm to about 14 plus mm with no modifications.


But more high resolution pics please, and if you want to share it I would like to know more about your z - x combination. So far a really awesome job you've done there
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-14-Jan

I'm currently experimenting with different items for the auto-tensioners. I started with a 4 point spring setup and lately I've been testing out other materials. The 3rd rod on the x axis moves forward or backwards to accomplish the task of multi rod sizes. The 4 point spring setup keeps it tight to whatever rod is on the z axis. The x rods actually hold the z axis bearing system in place using 6-608 abec 5 bearings on each side. There's a lot going on but really it's quite simple.

Did you want more high res pics of the x + z axis's and the auto tensioner?
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Re: JunkBot

Postby Lemm » 2014-Jan-Wed-14-Jan

REPRAP SQUAD wrote:I'm currently experimenting with different items for the auto-tensioners. I started with a 4 point spring setup and lately I've been testing out other materials. The 3rd rod on the x axis moves forward or backwards to accomplish the task of multi rod sizes. The 4 point spring setup keeps it tight to whatever rod is on the z axis. The x rods actually hold the z axis bearing system in place using 6-608 abec 5 bearings on each side. There's a lot going on but really it's quite simple.

Did you want more high res pics of the x + z axis's and the auto tensioner?


both. high res pictures in general but some more pics of the x - z too :)
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-15-Jan

I'll see what I can do as I'm in the midst of doing a y axis extension on my pb plus as well as replacing the majority of parts on it with custom milled aluminum. Right now I have the tensioner system torn apart but, once I get it together I can take some more pics. In the meantime I will try an snap some of the x+z setup. I've been running non stop for awhile, switching between projects as parts come in.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-15-Jan

Here's some more that I took earlier with a high res camera. Hopefully these help a bit.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Wed-18-Jan

I was able to snag a few more good pics for Ya. Hopefully the pictures help answer any questions you may have, if not let me know.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Jan-Fri-19-Jan

A couple of updates. Also the site has been updated quite a bit since the last few posts.
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Re: JunkBot

Postby greenb » 2014-Mar-Fri-01-Mar

wow, there is nothing junk about this bot. This was planned out and assembled with care. Do you like your Printrbot plus? I wanted to make a Printrbot LC but I could not afford it.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Mar-Fri-05-Mar

Thanks a lot, ya I absolutely love my plus. Im always updating and upgrading even though I really dont need to. The neat part is that there is a couple other people building a JunkBot in Australia. When I first started within the industry I definitely couldnt afford it either but I found parts anywhere I could. Check out my website at www.reprapsquad.wordpress.com and look at the printrbot Nintendo edition. It was a great build that I did fof a little of nothing.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Mar-Fri-08-Mar

I thought I might throw a couple updated pics so you can see some of the progress.
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Re: JunkBot

Postby greenb » 2014-Mar-Fri-09-Mar

Are you planning on cooling those stepper motors?
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Mar-Fri-10-Mar

More than likely. On my printrbot plus I run 40-45mm heatsinks on all the motors especially my 2 extruder motors. Ive found the motors are much happier when they are kept running cool.
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Re: JunkBot

Postby greenb » 2014-Mar-Fri-10-Mar

what kind of heatsinks do you use and what do you use for thermal paste? I think a stock CPU cooler would work great. You might be able to buy them off ebay for really cheap.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Mar-Fri-14-Mar

Typically the best ones come off of video cards and usually come in sizes between 40-45mm. 40mm is ideal but you can find thermal adhesives on ebay as well. They also have thermal stickers that work like double sided tape except with excellent thermal properties. You can find heatsinks on ebay for cheap and they come in just about every size imaginable.
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Re: JunkBot

Postby greenb » 2014-Mar-Fri-14-Mar

In my opinion, nothing beats having a good strong hold down clamp and arctic silver 5 thermal paste. If you wanted to do something cool, the stepper motor is about the size of a small GPU waterblock. Watercooling would be overkill but sometimes overkill is a good thing.
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Re: JunkBot

Postby REPRAP SQUAD » 2014-Mar-Fri-16-Mar

I've thought about doing it for extruder motors but with all the movement, it would be a headache. However I have been working on a hotend setup that uses a similar system.
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Re: JunkBot

Postby greenb » 2014-Mar-Fri-16-Mar

I look forward to see that hotend setup. anyway, it would be easier to watercool a Bowden extruder. You would not have to worry about the hoses moving around and either failing or kinking. This might be something I will have to try someday.
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