Sharebot SnowWhite2 HT User Manual Ver. January 2025

© Sharebot srl via Montello 18 23895 Nibionno (LC) Italia - Codice Fiscale, Partita IVA IT 03482570136 Tel +39.031.692.132 - Fax + 39.031.228.1412 www.sharebot.it [email protected]

• Verify that the grounding system is functioning properly. • Place the printer in a room where the temperature remains between 20°C and 25°C. • Always wear safety glasses to protect your eyes from potential laser reflections. • Always wear a dust mask when handling powders and follow the preventive measures recommended by the powder manufacturer. • The machine can be configured to operate in either a normal or an inert atmosphere. If using an inert atmosphere, an oxygen alarm monitor must be installed in the room where the SnowWhite2 HT is located. This monitor will alert you if the oxygen level...

The primary function of the safety system in your SnowWhite2 HT printer is to shut off power to machine components that could pose a hazard if used improperly, specifically: The external components of the safety system include: • The green start button (2) • The safety switch on the front door (4) • Pressing the red emergency button immediately cuts power to the laser system, heaters, inert gas control, and all movements of the powder distribution system. Once pressed, the button must be reset by turning it slightly clockwise before power can be restored. • Pressing the red stop button cuts power...

The SnowWhite2 HT printer is an additive rapid prototyping machine that uses a CO2 laser to melt thermoplastic powder, creating a three-dimensional object layer by layer. The main difference between the SnowWhite2 HT and the standard SnowWhite2 is its ability to reach temperatures of up to 350°C on the powder bed, building cylinder, and loading cylinder. This high-temperature capability allows the machine to study the printability of high-melting-point polymers. Objects to be printed are first designed using CAD software, saved in STL format, and then processed by a slicing program, which divides...

The SnowWhite2 HT printer consists of the following key components: • Powder Distributor - Composed of: • The upper shell, which encloses the printing area._ The lower shell, which supports the distribution system. • Heaters - Responsible for maintaining the required temperatures: • Powder bed heaters are located in the upper shell. • Cylinder heaters are directly connected to both the build cylinder and the loading cylinder, positioned in the lower shell. • Inert Gas System - Located in the lower part of the machine, this system regulates the controlled atmosphere required for the printing process....

Heaters The powder bed heaters consist of ceramic infrared lamps located in the upper shell, controlled by an IR temperature sensor. • The cylinder heaters are independently regulated by two thermistors embedded in the cylinder walls. These heaters are directly connected to both the build cylinder and the loading cylinder. • The ambient temperature inside the printing chamber is measured by a thermistor, though this sensor does not directly control the heaters. Note: If a lamp or any other heater needs to be replaced, the corresponding component must also be replaced. Both replacements must be...

The machine kit includes an upper shell support that can be placed on a table, providing a designated spot to rest the upper shell when it is removed from the machine. The upper shell has three windows: • The central window and the left window are coated with ZnSe to allow CO₂ radiation and IR sensor © Sharebot srl via Montello 18 23895 Nibionno (LC) Italia - Codice Fiscale, Partita IVA IT 03482570136 Tel +39.031.692.132 - Fax + 39.031.228.1412 www.sharebot.it info@sharebo

radiation to reach the powder bed. The right window is made of Pyrex for the internal camera, but it can be replaced with a ZnSe window if a thermal camera is installed instead of the standard camera. The lower shell is composed of the following components: • The loading powder cylinder (1) • The exhaust powder exit (2) The inert gas system is composed of the following components: © Sharebot srl via Montello 18 23895 Nibionno (LC) Italia - Codice Fiscale, Partita IVA IT 03482570136 Tel +39.031.692.132 - Fax + 39.031.228.1412 www.sharebot.it [email protected]

SnowWhite2 HT has a gas pressure regulator adjusting the input gas pressure to 0,5 bar more than the environmental pressure. The machine has an average consumption of about 170lt/h while printing. © Sharebot srl via Montello 18 23895 Nibionno (LC) Italia - Codice Fiscale, Partita IVA IT 03482570136 Tel +39.031.692.132 - Fax + 39.031.228.1412 www.sharebot.it [email protected]

Since the SnowWhite2 HT can print materials with a very wide temperature range, it is important to be cautious when changing powders. If the new powder has a processing temperature higher than the melting point of the previous powder, mechanical issues may arise, and the pistons may become clogged. To prevent this, follow these steps: 1. Dismount the two pistons from the cylinders. 2. Clean the internal parts of the cylinders and all areas of the printing chamber thoroughly using a cloth and Isopropanol. 3. Replace the old glass fiber cord gasket with a new one. 4. Clean the upper shell thoroughly....

2. Now, unscrew the three screws at the top of the piston and the two screws on the opposite side to completely disassemble the piston. Remove the old gaskets. Use gloves, as the gaskets are made of fiberglass. Clean the individual plates carefully. Reassemble the plates onto the bar, screwing back all the previously removed screws. Take one of the removed gaskets as a measurement and cut an equal length of 6mm fiberglass cord. © Sharebot srl via Montello 18 23895 Nibionno (LC) Italia - Codice Fiscale, Partita IVA IT 03482570136 Tel +39.031.692.132 - Fax + 39.031.228.1412 www.sharebot.it [email protected]...