Budget 3D Printer Fixes and Enhancements





Introduction: Budget 3D Printer Fixes and Enhancements

3D Printing Contest 2016

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3D Printing Contest 2016

I recently received a kit for a relatively inexpensive 3D printer, the JGAurora Z 605S. In this article I will provide details on steps that were required to make this printer work properly, as well as provide some insights for those new to 3D printing who may acquire this model, or another RepRap Prusa i3 clone. Your experience will hopefully be better -- you may receive a printer that works right from the start, but if not, I hope the tips provided in this article will help you solve the problems. Once this machine is up and working, it is a fantastic tool -- maybe not Ultimaker 2 quality, but definitely a tool worth having on a budget. All in all, I am pleased to have it despite the initial problems and it is likely that since I've reported the problems the manufacturer of this model may have fixed them if mine was not a fluke. Nevertheless, regardless of where your purchase your budget 3D printer this information may just make the difference in whether or not you ever get it working.3D

Step 1: Issues With the Kit...

The Plug...

The kit I received came with a UK power cord/plug. Obviously this doesn't work in the United States -- not even here in Texas! ;) This however is very easily resolved. Any 3-pronged (grounded) power cord will work. The Power Supply Unit (PSU) has a 110/220 switch on the side. You can use a plug available from any hardware store to resolve this issue.

Missing Hardware...

Be sure to carefully unpack the kit and check off the supply list. I found that my kit was missing all of the M3 nuts -- the most numerous item in the kit! In total my kit was missing about $18 worth of hardware as you. In the United States, metric hardware is generally more expensive and harder to find than "imperial" hardware. Nevertheless, all of the needed missing hardware was available at a local hardware store. (Lowes) You may however wish to check the instructions and fit carefully before purchasing hardware because the packing list is wrong in some cases and some of the hardware was not needed.


Assembly was actually fairly easy and there were few if any problems when the instructions are followed. As previously mentioned there were a few cases where hardware on the packing slip did not match what the instructions called for -- but, in these cases the needed hardware was supplies, at least in my kit.

Assembly took about 12 to 18 hours. This is where you may decide it is more cost effective to buy a pre-assembled system. :) Of course, I probably counted the time put into all of the trips to the hardware store, etc.

There are also some places where you will need to look at photos and decide for yourself the right way to do things. Running and binding cables is one example. Also the instructions do not detail wire connections to the mainboard -- so you will have to know enough about the design of the printer to get the basics in order to assemble it properly. If you are unfamiliar with which Axis is which, or what the heat bed or extruder are, etc., spend some time reading about the original RepRap Prusa i3 design. The photos in my kit for the wiring were based on an older board that is not longer shipped with the JGAurora Z 605S. Nevertheless most of the connections will be similar if not identical.

Step 2: Fixing the Reversed Stepper Motors!

Once my machine was fully assembled I began to test it out using the control panel. It became obvious immediately that there was a BIG problem. Only the Y axis was able to "home" until the limit switch was hit! The X and Z axis both ran backwards!!! In addition to this, the Extruder ejected filament instead of pulling it into and through the print nozzle!

This seemed to be anomalous to the manufacturer, who had nothing to offer. I suggested that I could use my ISP programmer to alter the firmware (supposing the board was similar to a RAMPS board), but was told that the firmware can NOT be altered. Otherwise it would have been trivial to reverse the X, Z, and Extruder motors via simple firmware changes.

Finally I decided to reverse the wires from these motors where they connect to the board. The JST-XH connectors will not allow you to simply insert the connector backwards! (I think the manufacturer must have accidentally shipped a set of boards with either incorrect firmware, or where the JST-XH headers were installed backwards.)

Hilitchi makes a very nice kit containing 480 pieces of 2.54mm JST-XH connectors, plugs, pins, and sockets. The kit is available on Amazon Prime for $20. Using this kit I was able to make 3 cables that reversed the wires in each connector. Just remember reverse all 4 wires so that it would be the same as if you were able to plug the connector into the board backwards.

This solved the problem with the reversed stepper motors!

Step 3: Printing Materials...


This is one area where the documentation and advertising for the JGAurora Z 605S was correct. This printer really is not well suited to printing ABS. Even the extremely cheap PLA that I bought (before I knew better) prints well with this printer. ABS will not adhere to the printer bed, with blue tape or to glass. There are many articles out there that will tell you how to make ABS stick. For me only one of them worked -- the one where I laser engraved a dot pattern into a piece of 1/4" acrylic and placed it on the bed with the heat cranked up to 100 C. The problem -- I got one thing to print and then the acrylic sheet was warped. Not worth the effort!

PETG: An alternative to ABS...

PETG is a great alternative to ABS, and this printer can handle it just fine. PETG has a shiny finish and has more flex to it than ABS, but it is not as brittle as PLA. Try it out and see what you think. In the attached photos, the blue funnels that I made for casting High Power Rocket motors (another article for another day) were printed using PETG. The smooth finish is perfect for a funnel, and the resulting product is strong. I had previously printed funnels using PLA but it was too brittle and they broke quickly.

Other materials

I have Ninjaflex TPE and Ninjaflex SEMIFLEX on order and will update this step when I have information on their suitability with this printer.

Step 4: Other Useful Instructables.com Articles...

Assembly and Glass Print Bed...

If you have troubles assembling your 3D printer, this article may help: How to assemble very cheap 3D printer

In addition to the assembly guide, this article shows how to add a glass print bed that works perfectly with PLA. Though the author provides few details, my glass bed was made from the glass from an 8 x 10 picture frame. I used a 40 W CO2 laser to cut it to the right size. You can use a glass cutter if you don't have laser. Also, a power sander (carefully used!) will round the edges of the glass nicely.

Printing ABS

If you want to try printing ABS on acrylic checkout this article: Reusable 3D Printing Acrylic Baseplate

Though it was not 100% successful for me, it may work for you. If it does, please add your own tips to the comments on this article. I have two spools of ABS that I can't currently use. :)

My articles...

If you "Follow" me you will see a few additional articles in the future that feature prints made from this printer. I have big plans, including plans to eventually 3D print a full size (e.g. 8 to 10 foot tall, 4 to 8" diameter) high power rocket -- but that will require finding or building a suitable printer. If you'd like to sponsor such a project (e.g. provide a capable printer) please contact me.

I will also publish an article showing the funnels in use for making High Power rocket motors, if time permits.



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    sir i build a similar printer but my print is not good.the part is soft and easy to break.what should i do

    You could have swapped the wire in the plug by pressing down on the little metal tab with a hobby knife or the like and pulling the wire out. When putting the wires back in just make sure the little tab is lifted up high enough to engage in the plastic casing.

    Yes, I am sure you were right. At the time though I was interested in verifying that I could get the thing working at all, and did not want to do anything permanent. Making the cables that swap the wires but still used the connectors tab will probably hold a bit better in the long run. Nevertheless, if anyone else runs into the same issue, and they don't want to make reversal cables, they should follow your suggestion!

    For anyone interested... It has been a few months since I wrote this article. Since that time I bought another 3D printer (which I may write about later). The new one is a Delta printer with a large capacity. It is also a kit from a Chinese manufacturer. It cost nearly $800 US. So far (6 weeks after purchase) I can not get it to print consistently or with anywhere near the quality of the JG Aurora Z 605S. So for a $200 printer this thing has been solid for me. The one problem with it (that this article highlights) would not have been an issue if the motor connectors were designed like those on most RAMPS boards so that they can be easily flipped around.

    Anyway, the point is that I'm really happy with this printer now. It has much better quality than I've gotten from the new printer that costs nearly 4 times more.

    Best Wishes.

    My kit was nearly identical to the one in this Intractable...

    A couple of things that made life easier for me when building my first 3D printer. When looking around on one popular auction site... I went through the photos of the printer, and chose one with all the electronics (minus the bed / nozzle heater wires) connected together with nice looking plugs, so no soldering needed. Plus good sized heat sinks on the board.

    The other thing was using 3M blue tape on the bed, with some Cube glue from the people that make Cube 3D printers. The Cube glue on top of the blue tape is a very nice, strong way of sticking PLA prints to the bed. I use this without the glass, just tape / glue on the aluminium print bed. Getting the print off the bed is easier when you heat the bed up to 50 degrees C. The bed only needs to be heated up when getting the prints off..

    I have a 36+ hour print printing on it now.

    A word of warning, pay attention to cable routing from the print head to the board. It can get hung up, and pull the head out of line during a print. The result? The temperature sensor came off, the head heated up and started burning the plastic away. That nasty burned plastic smell hung around for ages.

    Thanks, that is good to know. I have not had too many problems with PLA sticking, and PETG works great on the blue tape. ABS was the only problem and the Elmer's Glue Sticks have solved that.

    36 hours! Wow, that must be quite the print! :)

    Make ABS stick 100% of the time!

    For ABS, I used some scrap ABS and tossed them in a jar (with lid) and poured in Acitone. The acitone melts the ABS into a slury sauce which I then use a brush to dip and spread on the glass print bed. This makes the print stick 100% of the time! Looks like a mess on the bed, but works better than anything else.
    Its best to have a jar that fits the brush inside with lid closed. Be sure you can reach it after! Wood hand brush wont melt with acitone fumes inside jar.

    Thanks, yes I tried the ABS + Acetone method once a few weeks ago, but I did not get good results. It stuck better, but still peeled away during printing. So far the Elmer's glue stick works the best. Unlike the Elmer's glue stick, the ABS in acetone smells terrible! :)

    So what you have is not enough ABS in the solution. Your solution is too "thin". You want to add more abs so it besomes almost thick. Not quite "thick" but more dense. Play with it.
    You can also spread on more coats.
    I just never EVER had a problem with ABS not sticking after that. Only when the solution was thin. Also you want your heat bed hot the whole time. Maybe if your print is hours, then you can lower and the turn off the heat.

    To print ABS on glass put a thin layer of Elmer glue stick on the glass. Print with bed at 100+. Print sticks well and when the bed cools to about 50 it comes loose.