1.5$ Filament Dryer/PreHeater - for 3D Printers

Caution: This machine operates at high temperatures, reaching up to 110 degrees Celsius. Please ensure your safety and consider adding safety stickers if available. Don't forget to click the heart icon to add this instructable as a favorite, spread the love, and show your appreciation.

Introducing the Perfect Solution for Bubbling ABS Filament

Are you tired of dealing with bubbling issues when using ABS filament? Well, we have the perfect solution for you.

To address this problem, we need to heat the filament to a minimum of 80.9 degrees Celsius. This allows gases and moisture to escape, resulting in a smoother printing process. For this purpose, we will utilize a resistor as a heater.

Let's dive into the project and explore the steps to overcome ABS filament bubbling.

Step 1: The ABS

ABS, (Acrylonitrile butadiene styrene, Type: extruded):

Drying Temperature:Range: 70°C to 93.3°C, (158ºF to 200ºF).Average: 80.9°C,(178ºF ).

Glass-transition temp: Range: 108°C to 109°C.Average: 108°C, (226.4ºF ).Wikipedia: 105°C, (221ºF )

Begin testing around this temp:Substrate/bed temperature: <105°C, (221ºF ).

Enclosure temperature: <105°C, (221ºF ).

Material properties are generally stable between:−20 and 80 °C (−4 and 176 °F).

Linear Mold Shrinkage (extruded):0.002 – 0.008 cm/cm.

Average value: 0.00532 cm/cm.

Machine parameters:Extrude temp (RepRap): 210 C ~ 240 C

(Post By A2 , Forums.reprap.org)

So we Need A Heater to Go at 80.9*C So we used a 50E 20W Resistor For that. which Can Go 86.3*C in 30- 40 Seconds Or in the meantime the extruder heats before Printing.

Lets Browse The bill of materials.

Step 2: Bill of Materials

1 X 4mm to 4mm Pneumatic Union.

1 X M6 to 4mm Pneumatic fitting.

10 - 8 Cm (4mm OD, 2mm ID) Pneumatic or PTFE Tubing.

An LED.

1 or 2 50E 20W Resistor.

1 X 10k 1/4 W Resistor

some 24W wires Or Compatible ones.

Some Cotton.

Step 3: Assembly

1. Connect tubing to M6 to 4mm.

2. Insert the tubing inside the resistor with some cotton. to lock the pipe inside.

3. connect the union to other side.

4. connect the M6 side to your extruder.

5. Connect the 4mm side to your bowden PTFE.

6. Insert Filament in the extruder.

7. assemble the circuit from next step.

Step 4: The Circuit.

Make the circuit as follow

Remember to connect to the extruder pin rather than direct supply.

Insulate using some tape.

And you're done.

Step 5: Enjoy.

Support By Clicking the heart and adding to your favorite.

Thanks A lot

Any of the product improvement and Correction will be appreciated.

Step 6: Updates.

************************************************6/5/2016******************************************************

Added Holes to double assure gases can escape. as suggested by "Jean-BaptisteP"

Drill two 2 mm Holes through the union exactly in the middle, as in the pictures. And remember to keep the union part a bit(1 - 1.5 cm) elevated than the heater.

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