Comparison Jer RP560A vs Myriwell RP100B

The diameter of the nozzle provided in the pen.

The larger the nozzle, the thicker the lines produced by the pen will be (ceteris paribus; the actual thickness of the lines will also depend on the type of plastic and the adjusted temperature). In the thinnest models, the nozzle diameter is less than 0.5 mm, in the thickest models it is about 0.9 mm. Most modern 3D pens have nozzles in the range of 0.6 – 0.7 mm — this value is considered the most versatile and convenient for practical use.

The material feed rate provided by the pen. The higher this speed, the faster you can work with this model; on the other hand, the rapid supply of material requires increased accuracy and serious skills. The maximum value of this parameter in modern 3D pens is about 40 mm/s. Models with adjusted speed is also available (see below); for them, usually, the highest speed of operation is given in the specs.

Possibility to adjust the heating temperature of the pen with a "hot" type of operation (see "Product Type").

Most devices with this feature capable of working with different types of plastic — both ABS and PLA (see "Filament Material"). These types of plastics have different softening temperatures, and temperature adjustment is used in order to adjust the pen to a specific material. However, this function can also be found in models designed for one type of plastic. In such cases, adjusting the temperature allows you to prepare the device for threads of different thicknesses (the thicker the thread, the more intense the heating should be), as well as change the fluidity of the material (the higher the temperature, the more liquid the plastic coming out of the nozzle).

The ability to smoothly change the feed rate of the material. The speed adjust allows you to set the mode of operation of the pen to the circumstances: for example, a low speed will be convenient for fine work, and a high speed is so for large elements. Specifically, the smooth speed adjust is convenient because it allows you to select almost any speed in the range from minimum to maximum.

In addition to this type, there is also a step adjustment, for more details, see “Number of Speeds”.

The number of fixed speed settings provided in the pen. This spec is specified only if there is more than one such setting.

The speed control allows you to adjust the mode of operation to the circumstances: for example, a low speed will be convenient for fine work, and a high speed is so for large elements. And the more speed settings there are in the pen, the wider the choice for the user to configure the device more accurately. In the most advanced models, the number of speeds can reach eight.

Note that the speed adjust can be not only stepwise, but also smooth (see above).

The pen is powered by a standard USB connector. Such devices are as versatile as possible in connectivity: they can be powered via a PC, a portable device like a laptop or tablet, an external power bank, a USB wall charger or car charger.

Automatic power off of the pen for being idle for a while. Usually, auto-off triggers after a few minutes.

This feature is found mainly in models with a "hot" type of operation (see "Product Type"). It saves energy and reduces the risk of getting burned by accidentally touching the pen that is left on. However, there are also "cold" models with auto-off.

The availability of a built-in display. Usually, these are the simplest single-colour screens that display the basic operating parameters — speed and/or temperature. However, even such a display makes the pen more convenient and allows you to get important information about its operation.

The availability of a special stand for the pen. In models with hot operation (see "Product Type"), the stand is usually made of heat-resistant materials, and even a heated pen can be placed in it. This is much more convenient, and most importantly – safer than putting the device on the table without any stand or using improvised devices.