Tips on how to Print Flexible Filament

Print Flexible Filament with no stringing, no voiding, and easy overhangs. Print Ninjaflex, TPU, TPE and others at full-speed.

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If you need to venture in to the globe of flexible, sturdy, tactile printed parts, then you came for the proper place. Here is where you’ll discover to print flexible filament rapid and effortlessly print the softest filament available.

Employing the Flexion To Print Flexible Filament

This short article focuses on the way to print flexible filament with all the Flexion Extruder. For those who do not currently use the Flexion Extruder, then go get one and come back right here. Correct out in the box, Flexion produces rapidly (60mm/s), clean, void-free prints with TPU, TPE, Ninjaflex, along with other flexible filaments. Angus (aka Makersmuse) even uses it to test flexible filament: Critique of Flexible Filaments (with X60!). Flexion eliminates the standard problems you encounter whenever you print flexible filament: jamming, buckling, and oozing. Read on to locate some tricks to optimize your settings and generate great prints with your flexible filament.

Computer software Settings

Here’s an example of your extrusion settings we use having a soft TPU for example Ninjaflex (about 85 Shore A). These settings are valid for speeds up to 60mm/s. A number of factors to note:

The extrusion multiplier above 1.0 - when the drive roller and idler squeeze the filament, they proficiently decrease the diameter from the filament. This requires much more extrusion. As you boost tension you might ought to raise extrusion at the same time.

Extrusion width decrease than the nozzle diameter - this assists build gap-free upper layers. Having said that, it may also make overhangs difficult. You can really need to balance these factors to optimize your own personal prints.

Retract higher and fast - this keeps the nozzle from oozing and makes clean prints. Longer drive paths (Bowden drive, E3D hotend, Mk11 extruder), may possibly require even longer retractions.

We advocate that you just enhance outline overlap above 75% to ensure a good connection among outlines and infill. Other settings is going to be equivalent to what you use for other supplies.

Hardware Settings

First, adjust tension. Hold the filament between your fingers and load filament., then turn the adjust screw to maximize the pull-force around the filament. Most printers have a function to load filament automatically. If yours will not, then try this load/unload “print”.

The photo below depicts two identical prints (a single still has assistance material attached). The print around the left was made having a perfectly-functioning Flexion extruder. The 1 on the suitable had a little hardware concern that caused stress buildup and “blobbing”.

So how to fix this concern?

Blobs/strings/pressure buildup - when the barrel (see the exploded view for portion name reference) just isn't pushed each of the way up into the mounting block, then the PTFE are going to be in a position to float between the nip point and also the nozzle, permitting the accumulation of material among the PTFE and the nozzle. This is a problem that will manifest with time. You could get some quantity of “good” prints ahead of seeing this impact. The best technique to fix it can be to disassemble your hotend, take away any material, and reassemble. Guarantee that the barrel is seated on its shoulder against the bottom of the mounting block. Make sure to tighten the nozzle when it can be at temperature to acquire a very good seal.

Bumpy surfaces/inconsistent extrusion - this can be attributable to undesirable settings. Before you take into account hardware problems, adjust temperature and extrusion up and down. If that doesn’t assistance, you could have an under-powered extruder motor. This could “cog” toward a steady magnetic position when it needs to be micro-stepping, causing visible locations of over- and under-extrusion. To operate the Flexion, we suggest a minimum of 250N-mm of torque. Most Nema17 motors attain this, but some drivers do not deliver sufficient current. This happens most typically on Wanhao (and related) printers, particularly one particular batch that shipped in early 2017. To adjust current, comply with the guide right here. You may also find replacement motors on Amazon.

Design and style Considerations

Here are some quick tips to optimize prints for flexible filament:

Maintain overhangs at 40° or much less

Style in peelable support wherever possible (see Ninjaflex Help Material here)

Use slicer-generated support and eliminate with side-cutters. This performs superior than you may consider

We hope this assists you print flexible filament using the Flexion Extruder. Should you have any concerns, we are constantly here to answer them! Just send a message by way of our get in touch with type.

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