Monthly Archives: November 2013
Update: January 11th 2013
Printrbot is now offering the aluminum direct drive extruder while slowly phasing out the wood DDE. The simple is among the first printers to offer the aluminum extruder with the purchase of the kit or assembled unit. It is called the 2014 edition and also comes with an extended aluminum bed. You can buy the upgrade kit as well which will bring your older simple up to the new specs. A great deal for the price. If you buy the aluminum extruder upgrade kit by itself and you have a v1 plus or lc, make sure to check out thingiverse.com for adapter plates.
Printrbot has recently released some pics of their long anticipated aluminum extruder. They cut the fat off of the direct drive extruder (DDE) and dressed it up with a shiny new design. The new DDE is lighter, stronger, easier to load, boasting with design flare and just down right cool looking. They have re-oriented the spring tensioner which will allow for much easier swaps and adjustment. We anticipate the release of the production version of the dual and possibly triple extruder setup at the same time of the new DDE.
With an estimated price of about $40 for the all aluminum DDE, it’s something anyone can afford and will surely boost print quality as well as reliability. In the dual extruder beta the DDE’s are placed side by side which eats up a bit of x axis travel. The new design is thought to be placed one behind the other, giving the overall layout a better look with better overall balance. Another thing to consider is the fact that aluminum won’t swell and be effected by heating cycles like the wood DDE. This means the new extruder is more of an investment, then an upgrade. I say this because it will save you money and frustration in the long run.
We will be testing out the performance of the new DDE VS the wood DDE and reporting our findings for those who need a little more encouragement before buying. We expect the release of the dual extruder and all aluminum extruder to be very soon.
Posted from RepRap Squad HQ
After answering countless posts on PrintrbotTalk.com about where to find this or that. I decided to take it upon myself to start compiling calibration guides, diagrams, YouTube videos, how to’s and much more. This is a work in progress but, hopefully this will help people new to 3D printing as well as seasoned vets.
****In order to make this the best possible resource we will need your help. So if you know of a link, page, diagram or anything else that would help another fellow Printrbotter out, please either post it on the comments here or email us at RepRapSquad@techie.com and we will organize it into its own page. ****
Posted from RepRap Squad HQ
Update: January 11th 2013
Only a few more days until we start to transform our printrbot plus v2 into a mostly aluminum beast. We will also install our pb dual extruder production kit and the details of that will be documented under, “Dual extruder production version.” That way we can keep everything organized for easier referencing. The dual extruder production kit also has upgraded aluminum parts which will go nicely with these upgrades.
We have done a few upgrades to our printrbot plus V2 in order to get it ready for a quad extruder setup. GoldAugust helped us at RepRap Squad to come up with a solution that will take our printrbot plus to the next level. When you are talking about the added weight of more extruders, stability can become an issue because it can be a lot of weight to speed up as well as to slow down. The printrbot plus was obviously not designed with quad extruders in mind even though I believe the stock platform could handle it. I just don’t think it would be able to over a long period of time with constant use, without serious wear. The platform itself is a great base however and can easily be upgraded to handle the weight of 4 extruders, with at least 2 of them being direct drive. So we decided to address any weaknesses within the plus v2.
While we have everything apart we might as well extend the y axis (bed). The new 8mm rods measure in at a little over 17 1/2″, this will translate into about 3 – 3 1/2+” of added usable print space in the y axis direction and the width staying almost stock at a little over 9″. My z axis had already been upgraded prior to give me about 16″+ of usable height. This will change the overall plus’s print space to about 16+x16x9 inches or 404x404x230 if you use mm.
Another upgrade that will take place is the upgrade of a few weak spots on the plus V2’s platform. Printrbot has already addressed most of these issues with the release of the plus v2.1. One of those upgrades is to change out all of the bearing block mounts to aluminum. The reason for this is simple, aluminum is light, strong and won’t warp within these operating conditions. I already upgraded the mounts that hold the z axis rods into place initially after building my plus. That leaves the y axis, z axis on the bridge (carriage) and the x axis. Taking on this challenge the designer, GoldAugust also wanted to figure out a setup for the x axis rod mounts as we as the nut traps for the z axis. The z axis nut traps have been known to allow slippage or in some cases binding.
With these upgrades this plus will be ready for its ultimate goal and that goal is eventually quadruple extruders. The aluminum parts will give it the added strength required to move as well as stop a much heavier carriage. Also we recently upgraded all of our motors to Kysans, which are definitely the best bang for your buck as they run very cool, high holding torque and are made of high quality parts.
I will also test out the running the smaller kysan motors on the extruders. They have less torque then the longer kysan motors but, they are also almost half the weight. This would allow me to use the larger kysans for the z axis, which would be better suited for any added weight. If the weight of the new aluminum parts is even a slight issue, we will redesign the parts with milled out pockets to shave of any weight that may be an issue. Really the only parts that may be effected by added weight would be the extruder mount (carriage or shuttle) as the z axis setup can more than handle the weight and it doesn’t have acceleration/deceleration kinetic energy that the extruder mount does. With the new extruder mount we will be getting rid of quite a few layers of wood as well, this will help eat up some of the weight difference.
GoldAugust is using Inventor to design all of these parts and from early design pictures I can tell he is very talented.
Here’s some of the designs created in inventor:
After we test out the upgraded aluminum parts, GoldAugust will be selling kits as well as individual upgrades. We will be taking lots of pictures of the transformation as well as posting overall results from the upgrade. More then likely I will try to get access to a good camera to take some video of the new mods in action. We will also do a few before and after pics so you can see the difference.
I know that this will greatly affect stability and I hope to see this translated into a better overall print quality. As you may have noticed, Printrbot has changed a lot of the parts on all their printers to work with aluminum parts as they don’t warp under these operating conditions. The milled z axis nut traps will also make a huge difference as I like many have had issues with them moving or partially rotating during prints which does effect print quality.
None of this would have been possible without the help of GoldAugust and I must say he is one of the best at what he does. Check back often for updates on testing, new pics and all kinds of greet info related to this project.
Here are the first pictures of the prototype aluminum upgrade parts for the printrbot plus and LC v2. The x axis rod spacing is different on the Plus v2.1 so we will be making a second version for the Plus v2.1. The front plates have covers that can be custom ordered to make your printer truly yours. The ones pictured are just some samples of what we came up with. When GoldAugust starts to sell these we more than likely won’t be able to sell you covers with the printrbot logo as I’m pretty sure it’s under copywrite and we definitely wouldn’t want to step on any toes.
Eventually some of these add ons and mods will be available for sale through GoldAugust. We will not be able to sell anything that is of Printrbot’s designs due to copyright for non commercial use. We will however be coming out eventually with aluminum upgrades and extensions for the printrbot plus, LC V2’s and V2.1’s.
Posted from RepRap Squad HQ
Why build such an extensive setup?
There are many reasons that I decided to build this setup. One of the most important reasons is to be able to show my students how the electronics work inside a printer. With everything split out to its own terminal block and neat labeling, they can start to get a grasp on what does what. Another reason is mobility. I take my Printrbots all over the place and having a solid case that will protect all of the, “brains” of the operation is important. Also since the extrudaboard won’t fit in the plus’s undercarriage, this is the next best thing. I work with a lot of designers and electrical engineers, so this makes it easy to test out prototypes as well as debug any potential issues that may arise. I’ve found that the majority of issues I’ve had were very simple ones but, they took a good deal of time to track down. Now with the new setup, all I have to do is look at one of the indicator panels and say, “oh that’s what is going on. ”
This setup probably isn’t for the person that is into printing just as a hobby. However it isn’t hard to do and if you need help building a similar setup. I’m always available to help.
My Original Plan:
I decided it was time to make a case to properly house my Printrboard, wiring, 350w PSU änd extrudaboard. I was tired of un-organized wiring as well so I bought a bunch of new DB-9 male and female pin sets as well as everything else needed to organize my entire printrbot plus setup. I also bought 20, 12, 10 and 4 position terminal blocks so I could make quick plug panels on the case. This would allow for quick transportation and setups as well as reliable connections.
The case I will be using is an antec gamer9ine. I chose this case for a couple of reasons, one of them being the ample cooling built into the case and the other is the layout. It also fits my printrbot plus’s PSU perfectly. All of the built in fans have 3 position fan switches which allows for easy adjustment on the fly. I will also be using a front mounted fan controller to adjust the Printrstands cooling system.
The New Plan:
I liked the space involved with using a full size PC case but I later realized it was a little too much. Rummaging around for some spare parts I found an old server case which looked perfect for what I needed. I am still planning on using all of the other stuff for this one as I was with the old design. I decided to use the DB-9 cables for the end stops or homing switches, 4-pin molex connectors for the motors, DB-9 cables for the thermistors and fan lines. I may or may not use XLR connectors for all the heavier power wires like the two extruders and heatbed that will hopefully be added on at a later date.
Some other items I decided to add are:
• LED status lights for: Power, standby, homing switches, motors (during operation ), hotends On and a few others.
• USB on the front or rear of case. This will allow me to have an input that will take all the wear and tear away from the USB plug on the Printrboard.
• Various switches: Power, standby, task lights and bypass.
• Every connection will have a plug on the front or rear of the case. After that they will run to terminal blocks and then to the controller boards.
• 40mm rear mounted fan will help to circulate air within the case. I also plan on modifying the top cover to mount two fans ranging from 60-80mm. (One will be mounted over the Printrboard and the other will mount over the Extrudaboard. )
November 5th 2013
Today I started the task of wiring all the plugs and piped all the lines to the Printrboard. My hands are actually sore from stripping and crimping all the required terminals. I feel confident that this setup will relieve any issues with potential disconnects. I’ve assured this by making sure that all connections made are either soldered, clamped to terminals or hard wired with heatshrink tubing. The reason I am being so carful is due to possible disconnects during operation on the motors lines which could carry the potential of destroying my drivers or the Printrboard. This is especially the case for anyone running a RAMPS controller.
Another nice feature of the new server case is the lid is removable with a couple screws that I will be replacing with quick release ones that don’t require the use of a screw driver to remove. This will give me quick access to all of the wiring. I will be using metal and thin acrylic cut outs to make my custom panels. I also decided to add a few things in case I decide to upgrade to triple or quadruple extruders. The quadruple extruder idea is actually already in the works as the extrudaboard has supports 3 extruders and I will be testing out a board that will add-on to that setup. I really want to use Printrbots Ubis hotends but, just in case they take up too much room I have designed a custom solution with quad extruder support in a space saving design.
Back to the custom case. I added an extra DB-9 input to allow for expansion of 2 more thermistors, 2 more power lines for the extruders and I will add the required wiring for the extra motors at the time of upgrade. I have cut out the basic shapes needed for all the panels but, I haven’t cut out the connector holes yet. I also plan on mocking up all the status lights tomorrow as I haven’t decided their final mounting locations. I have the majority of the internal wiring finished and I still need to add the 4-point zip tie mounts. Once I add updated pics you will see the 4-point zip tie mounts. They are great for adding anchor points and they are fairly reasonable priced.
Here are some quick sketches and diagrams that I drew in order to figure out where everything should go.
Update: November 6th 2013
The main reasons for this build besides mobility, protection and accessability, was to be able to effectively debug any potential issues that may arise during operation. I also wanted a platform that would allow me to easily upgrade to triple and quadruple extruders when I decide to do so. One issue that might arise is the height of the power plug on the Printrboard. I made sure that there will be enough space but, just in case I came up with several different solutions as only a few more mm would be needed.
Update: November 7th 2013
Today I started messing around with ways to make my own labels/stickers to put on the cables and a few other places in the case for quick identification during debugging/troubleshooting. Since I don’t own a label maker or have the want to spend good money on sticker paper. I decided to be inventive in solving this issue. I looked around the prototyping lab to see what I had to work with and I found a bunch of blank stickers you use to write your name on. I took those to my computer and used Word to write all the labels I needed. Then I printed them out to see where they fell on a regular sheet of paper. After that I took some tape and lightly taped the blank stickers on the page. Putting that sheet back in the printer upside down and hit print. The printer then printed out all the required labels and all I had left to do was cut them all out. I used different size fonts depending on the space available for that particular label.
I decided to label each cable on the ends, each terminal block output, connectors and the outside of the case on the panels. This will make debugging very easy, even for someone un -framiliar with this particular setup.
My tablet unfortunately doesn’t take the best pictures in the world but I wanted you to get an idea of how and where I decided to label everything. When I get to a digital camera I will take better pics.
I finally figured out how to mount the power supply. I decided to reinforce the side so I could mount an adjustable mount that holds the PSU. It is semi-permanent. It has adjustments on the side that slide in to lock the power supply to the side of the controller enclosure. It is very stiff and the base acrylic plate is a little over 1/4″ thick.
Update: November 11th 2013
Today I plan on starting to cut out the spaces on 2 seperate panels for 6 4-pin molex connectors. These will be used to plug in the motors for my plus. I also took this opportunity to upgrade the wiring throughout my machine. Now all my motor wiring + power to extruder is about 14-16 gauge, endstops are about 20-22, thermisters are 20-22 and my power wiring is about 10 gauge with an in line fuse rated at 18amps. Later on I also plan to fuse the AC lines but for now those will be left stock.
Update: November 23rd 2013
I have taken a small break recently on the printrcase to work on a few other small projects but, today I had some more time to work on the control case. Today I built in all the XLR cable mounts on the front. I decided to add 4 of them even though I will only be using 2 currently. These are being used to run the power to the extruders. Eventually I will have 4 extruders hence the 4 XLR plugs. I currently have the hardware to run 3 extruders and I just got a new ad on closed loop stepper controller which will allow me to run four extruders. We are currently in the midst of designing the mounts for the quad extruder set up, more on that later.
I also took the time to set up the DB9 cable connection. I built the six 4-pin molex connector extensions that will connect all 6 kysan motors, leaving space to add two more for the eventual quad extruder setup.
Update: November 25th 2013
Like many of my build I am never truly satisfied and tell everything is perfect. I learned quite a bit with the first to printer case designs and builds. I figured out what worked and what didn’t. More importantly, I figured out the setup that would work the best to fit my needs. Space isn’t too much of an issue but, portability is. Before building yet another controller case I decided to figure out what was most important to me in a controller case. These are my main requirements: Portability, protection of all electronics, being able to fit as much as possible into the case, easy debugging, room for expansion, easy access to wiring etc, quick setups and tare downs.
I liked the server case that I used in the prior build but, I wanted to be able to fit two or at bare min one power supply. So I started hunting around for a new case that would fit a power supply as well as the essentials without being too big. I ended up settling on a small computer case, the smaller. desktop kind. It’s one of those old school “micro desktop” cases from about 10+ yrs ago. It has a corner sectioned off that fits the ATX PSU perfectly. It also had ample room for a cooling system that will surely keep the electronics free from heat. I was able to re-use the majority of wiring and parts from the last case. I still need to figure out mounting points for all the plugs. Being a computer tower it had spots that I could easily adapt for this use.
For the most part I was able to plum the majority of the wiring except some of the plugs that will connect on the Printrboard end. This setup is laid out more effectively the the prior setup. I was able to move all 6 of the motor input connections to the rear. Also the fan wiring, homing switches and thermistor were moved to the rear via DB-9 cables. The fan controller for the cases cooling system is also in the back but, I may move it to the front for easy adjustments. The power for both extruders is mounted on the left side via upgraded XLR cables with locking mounts. The USB plug was moved to the front and it is extendable if needed. I also decided to add a three point foot leveler setup that can be adjusted up to 3 inches up or down on each leg. I plan on re-painting the case black to give it a more sleek look. I will update with pics as I go.
Here are a few pics from the last few days of the build.
Update: November 30th 2013
Today I plan on printing a few parts required to mount some connectors as well as some wire management clips. I also need to figure out where I am going to add the fourth extruder closed-loop controller. I plan on mounting it somewhere near the Printrboard and extrudaboard. I will update today after finishing some prints. I’m not expecting the quality of prints to be great due to recent damage done to my plus, but hey it’ll get me by.
Posted from RepRap Squad HQ