Difference between revisions of "3D PRINTING WITH ROBOTS"

Revision as of 15:32, 28 January 2024

Material Preparation

Testing material viscosity and printability before 3D printing with a robot is indeed a prudent step to ensure successful printing outcomes. Here's a breakdown of the recommended process:

Manual Extrusion Test with a Closed Tube Mortar Gun:

- Use a closed tube mortar gun to manually extrude the material.

- This allows you to assess how the material flows and how it behaves during extrusion.

- The closed tube design helps in maintaining consistent pressure and control over the extrusion process.

Mixing the Material:

- Ensure thorough mixing of the material to achieve homogeneity.

- Inadequate mixing can result in inconsistencies in material properties, affecting print quality.

- Avoid adding excessive water content, as it can cause shrinkage issues during printing.

- Conversely, too little water content can lead to dry material, making it difficult to print.

Motor screw extruder

The Motor screw extruder was originally developed by Eduardo Chamorro Martin in collaboration with 3DPA IAAC. This innovative tool, which is open source, has since been further enhanced and modified by IAAC staff members for various applications.

For detailed information and updates on the Motor screw extruder, please visit the GitHub repository at the following link: https://github.com/EDUARDOCHAMORRO/FabricatableTools

1- Motor

2- Control system: Frequency converter with switch elements, power supply inlet plug with undervoltage release to prevent re-start in case of voltage interuption

3- Hopper for wet premixed material

4- Housing with polyurethan inlet

5- Worm pump

6- Pump outlet with pressure gauge

Operating the machine

Connections Before Start-Up

Connect the main power plug to the control cabinet with the cable to the construction 230V/1/N/PE/50Hz (3x1,5mm2).

Make sure that all cables and safety devices are functioning properly.

Start-up in manual mode

- Before Operating the machine check the machine state. Switch rightwards for manual mode.

- Step 1: Turn on the main switch

- Step 2: Fill the material-hopper with wet premixed material.

- Step 3: Turn the Forward/Reverse Switch to FWD (Start the machine by turning the mode switch from 0 to FWD)

- Step 4: Turn the Speed control to the desired speed

Stopping the pump:

- Step 1: Turn the Forward/Reverse control to 0

- Step 2: Turn off the main switch

Termination of work and cleaning

After work is completed or in the event of longer inter- ruptions, run the machine until the material hopper is empty.

Step 1: Wash the hopper with clean water, rub the hopper with the sponge provided if it is necessary

Important:

Never use any cutter or any sharp/rough tools to clean the hopper, always use the rubber tool that is provided.

Step 3: Soak a sponge ball in water.

Warning!

Never disconnect the hose when there is any pressure in the pressure gauge. Remove the remaining pressure gauge reaches 0.

Step 4: Open the hose coupling, insert the sponge ball into the hose.

Step 5: Reconnect the hose coupling

Step 6: Start pumping and wait for the sponge ball to come out of the hose.

Step 7: Grease the pump after cleaning to ensure the pump gasket is residue free.

Step 8: Ensure that the grease is pushed out of the pump gasket.

Warning!

Never disconnect the hose when there is any pressure in the pressure gauge. Remove the remaining pressure gauge reaches 0.

If the machine is not required for a longer period, dismantle the rotor and stator and lubricate them with slide spray. Reassemble the components and put them into the machine again.

Troubleshooting

Pump not starting:

- Ensure that the remote control plug is properly installed.