How To Succeed When Printing With ABS

What’s ABS? ABS is likely one of the mostly used, and most versatile supplies obtainable in 3D printing as we speak. If you happen to’re new to the scene although, it may be a bit daunting to begin with. Nonetheless, the payoff is value it. Studying to print effectively with ABS is crucial if you need robust, warmth resistant elements.

ABS or Acrylonitrile Butadiene Styrene is a standard thermoplastic. It’s a well-liked plastic for injection molding and it’s used to make legos, devices, sports activities gear and extra.

If you happen to’re used to printing with PLA, you’ll in all probability discover ABS a bit of trickier to print with. There are a pair extra steps required for every print, and it has a distinct set of printing settings. Nonetheless, you needn’t despair. ABS is a robust and warmth resistant filament, with superior publish processing choices. With this text beneath your belt, issues can be printing your means.

Getting that first layer proper

As we mentioned in our PLA article, getting the primary layer down is a very powerful a part of the print. Listed below are the important thing factors:

1. You want the print mattress (or print floor) to be degree
2. You want the extruder to be homed to the proper peak from the mattress.
3. You want a great adhesive to help your ABS in sticking to the mattress.
4. And naturally, ensuring that your extruder is heated to the precise temperature.

Lego bricks comprised of ABS

Printing on glass with Kapton/PET tape

To be able to print with ABS, you want a temperature managed mattress. The beneficial mattress temperature for ABS is 110°C.

As an alternative of printing immediately on the glass, it’s higher to print with Kapton/PET tape. This makes it simpler to scrub the mattress after you’ve been printing for some time, as you may merely take away the tape, clearing any leftover adhesive or filament. For directions on making use of Kapton tape see the video under or learn our article: Mattress Surfaces – How you can apply Kapton Tape

Having your mattress degree and extruder on the proper peak is extraordinarily vital when printing on tape.  In case your extruder is simply too removed from the glass your ABS merely won’t stick. If the extruder is simply too low the glass it would fully block the extrusion of fabric and should trigger a jam after prolonged intervals.

You must also just be sure you have an adhesive of some kind. ABS requires one thing to bind itself to in the course of the first layer of the print. Probably the most generally used adhesives are glue sticks, ABS slurry, and hairspray. We want hairspray as a result of it’s simple to use and smells good. Be sure to get the type with a plastic base. (We have now used “Aqua Web Additional Tremendous Maintain”)

In case your first layer will not be sticking:

1. Be sure the mattress is degree.
2. Be sure the mattress is sizzling sufficient.
3. Make it possible for the ambient temperature of the print atmosphere isn’t too sizzling or chilly (or else modify accordingly).
4. Be sure to put the adhesive on the mattress.
5. Be sure the print head is shut sufficient to make a pleasant squished first layer.
6. Be sure to run the extruder sufficient earlier than your print begins so there may be filament going onto the mattress throughout your complete first layer.  In MatterControl you may set how a lot materials you want to extrude earlier than the print begins, both with loops, or in case your an skilled GCode instructions.

7. Kapton/PET tape is a good way to print ABS.  It makes an awesome shiny backside layer and the heated mattress ensures that your elements keep good and flat.

   For extra in depth info relating to ABS mattress adhesion try this text we wrote for extra detailed steerage.

Getting the temperature proper

When working with a brand new roll of filament for the primary time, we usually like to begin out printing at about 230c after which adjusting the temperature up or down by 5 diploma increments till we get the standard of the print and the energy of the half to be in good stability with one another.

What to search for

If the temperature is simply too excessive:

You will note extra strings between the separate elements of your print and chances are you’ll discover that the extruder leaks out loads of plastic whereas transferring between separate areas of the print.  If this occurs it’s best to attempt to incrementally decrease the temperature by 5 levels till the extruder will not be leaking a lot materials.

Generally you’ll have a cloth that’s merely much less viscous than ABS and can leak extra even at decrease temperatures.  We suggest you enhance the retraction a couple of millimeters (3-4 looks as if a great quantity for many each ABS we have now tried).

If the temperature is simply too chilly:

You’ll both see that the filament will not be sticking to the earlier layer and you’re getting a tough floor, or you’re going to get an element that’s not robust and may be pulled aside simply.  In both case, it’s best to enhance the temperature by 5 levels and check out once more till you get good line segments on each layer and have a robust half when achieved printing.

A print gone chilly. Verify your retraction and warmth for clear prints.

Altering filament

When switching ABS colours:

1. Whereas the extruder is chilly set the warmth to 120c and look forward to it to warmth up.
2. While you attain 120c take away the present filament from the extruder.  You could possibly again it out by hand or chances are you’ll have to reverse the extruder.
3. If you’re having hassle eradicating the filament, enhance the temperature to 180c and check out once more.
4. Clear the extruder gear and blow out any particles from the extruder entrance. 
5. Improve the warmth and cargo the brand new filament usually.
6. Run the brand new coloration by means of the extruder till it runs clear and the brand new coloration is all that’s popping out of the extruder. If you’re switching from a darkish coloration (comparable to black) to a lightweight coloration (like white or pure) chances are you’ll wish to extrude for a couple of minutes to be you positive haven’t any darkish contamination.
7. Print one thing that you do not care if it has bits of the earlier coloration in it, or run the extruder for a number of minutes.  It could take as a lot as 10 to fifteen minutes of extrusion earlier than you may believe that there will not be darkish materials combined with lighter materials.

Be aware: We beneficial eradicating the filament when tender quite than when absolutely melted so that there’s a decrease risk of depositing melted materials onto the extruder drive gear or leaving meterial excessive up the soften chamber entrance.  Each of which might trigger jamming and are laborious to scrub out.  Tender elimination additionally helps make sure that you get all the things out of the extruder tip.

What to do when issues go incorrect

There are a couple of key issues to test when your prints aren’t working.  However earlier than we have a look at options we have to have a short description of your signs.

“I can not get the primary layer to stay.”

1. Be sure the extruder is on the proper peak. Regulate the restrict change or extruder to 0 peak
2. Be sure the print mattress is degree. Degree the mattress.
3. Be sure to’re printing on the proper temperature and that your mattress is the precise temperature.
4. Verify the ambient temperature of your atmosphere. If it’s too chilly or too sizzling outdoors, your print can differ drastically!

“The half has dangerous inner layers and high surfaces.”

1. Verify the extrusion temperature (chances are you’ll want to extend it by 5 diploma bumps).
2. Verify the filament stress.
3. Clear the filament drive gear.
4. Lower your velocity.
5. Be sure your half is correctly cooled.

“The surface edges of my elements have a lot of little bumps on them.”

1. Be sure your printer is getting sufficient knowledge. If printing from a pc, make sure that the pc will not be too busy to feed the printer instructions. If the printer is pausing it’s normally as a result of pc being too busy.
2. Print from the SD card. On some printers you may try to print from the SD card.  This usually helps the printer have sufficient knowledge to run extra easily.

Nonetheless, do not be too fast to imagine the issue is in your ABS.  With the precise settings and persistence hobbyists have succeeded in printing all kinds of supplies lots of which have very low viscosity.  It’s best to be capable of get usable elements even with some decrease high quality filament.

“Tall sections of my prints look melted or squished collectively.”

1. Activate “Cooling”. In case your printer has a fan it’s best to allow “Cooling” within the print settings.
2. Get a small fan. In case your printer doesn’t have an built-in fan it’s best to look into getting a small desk fan. This will help dramatically with tall sections of your print or when “bridging” (printing high layers that span gaps).

My half is curling out of bed.”

1. Just remember to have a great quantity of adhesive on the mattress and that you just’re making use of a recent layer with each print. As well as, activate a brim. Having a brim that extends out a bit helps give the half a big base to work with, in addition to having extra to stick to.

“My printer won’t extrude any materials.”

1. Be sure your sizzling finish is getting sizzling. Verify to verify the recent finish is heating in any respect.  If it’s not, that you must have your printer serviced. It’s doubtless that you’ve got a unfastened connection, or your electronics have been fried (assuming the printer remains to be linked and responding to your host software program).
2. Clear the drive gear and modify stress. The very first thing we’re going to do is clear the filament touching drive gear and make sure that we have now correct stress in opposition to the filament.  Often improper stress or a clogged drive gear will make the print look extra like the image we have now for low temperature filament, nevertheless it generally does stop extrusion all collectively.  Clear the pinch wheel with a wire brush, and ensure your stress is sweet and stable (an excessive amount of may stop extrusion and is extra widespread with direct drives [the motor is directly connected to the drive gear] however much less widespread with geared drives).
3. Take away the present filament. It could be that you’ve got a small particle in your extruder tip jamming the plastic.  Use the change filament method described above to tug out any particles which might be within the extruder tip.
4. Verify for and take away jams between the extruder and sizzling finish. That is probably the most excessive sort of downside as a result of now it is time to take issues aside.  Generally warmth can creep up the filament within the extruder and trigger a bulge that then cools and prevents any additional extrusion. That is normally on the junction between the extruder and sizzling finish. Take off the extruder and take away all of the ABS you may (chances are you’ll want the recent finish sizzling to get all the fabric out.)  If you cannot get out all of the filament by pulling, chances are you’ll have to try to drive it down by means of the recent finish. We normally use a small allen wrench.  If this fails you may try to drill out the extruder or sizzling finish however chances are you’ll want to switch elements.  Make sure to take precautions in opposition to being shocked or burned.  If you’re not certified to do that work, discover somebody who’s, quite than danger damage.

Thanks for studying this text!

If in case you have any feedback, corrections, or contributions, please drop us an e-mail or give us a name. We’re all the time searching for suggestions, and finest practices – and would love to listen to from you.

Sincerely,

The MatterHackers Crew