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Parts List

XH B310

One of thermometers that are able to measure high temperatures (up to 800°C). You not need to use this part, if you are able to measure nozzle temperature in other way. This is the most simple way, that I found.

Power Supply

You can use 5A and also 10A. The difference is in the stability of the engine speed and the stability of the nozzle temperature. The stronger the source, the faster the nozzle heats up.

PWM Regulator 12V 5A

PWM 12V DC Motor Speed Controller Module DC-DC 4.5V-35V Adjustable Speed Regulator. This small component allows for a smooth reduction or increase in engine speed without loss of torque.

12V 7RPM DC Motor

The motor is built into the holder and drives the spool for winding the finished pet filament. This 12V DC motor has its own gearbox (it is not necessary to print the gearbox). This means very high torque without any additional gear system.

Heat Block

The heat block is the part heated by the heating element (12V 40W). When choosing, it is important to know that the larger the block, the slower it cools with less temperature fluctuations.

Heater 12V (40W)

Ceramic heater 12V (40W) is a component that is inserted into the heat block and ensures heating of the nozzle. It is a cheap and simple component.

Diode 1N5408

This cheap component is used for the input modulation for the W1209 heat controller. W1209 is a temperature control module for use in egg hatching incubators. Therefore, the W1209 is designed to operate up to a maximum temperature of 110 ° C. By using a diode, we ensure that the value at the input of the temperature controller drops sufficiently for use up to 250 ° C.


This is heart of the Petamentor project. W1209 is designed for temperature control up to 110 ° C. That’s not much, so we have to change the behavior of the module using diode 5408 on the input.

100K Thermistor

This part will replace an original W1209 sensor.

Color Switches

You need one for 230V (EU), or 110 (US) and one for PWM controller 12V. But you can use 230 (up to 250V) for all purposes

Nozzle (must drill DIY)

To convert a PET bottle into filament, I use a standard nozzle with a diameter of 0.4 mm, which must be drilled. Drilling is very simple, using a 1.5mm drill bit. Here is a video tutorial.

Wood screws M2.6 (10-12mm long)

Wood screws that are for attaching all the 3D printed parts of the PETamentor. The wood screws must not be longer than the thickness of your wooden platform.

M3 Screws (10mm)

Screws for cutter assembly, puller assembly and spool assembly. The screw is 10mm long – metric M3 type. You can choose the screw head as you like.

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