If you have a two-headed 3D printer, you can achieve more accurate results with the right calibration. That’s how it’s done.
Plastic-processing 3D printers are available with one and two extruders. If a device has two nozzles, you can print two-color objects without having to change the material. You can also use special materials for support structures with dual-head 3D printers. This is suitable for objects with strong overhangs or auxiliary structures which should disappear completely after printing – for example because they are water-soluble. The tip tells you what you need to consider when performing dual head calibration.
Two jets – separate drives: Good 3D printer with two extruders separate the two systems mechanically. This allows the two print heads to be used separately. While one extruder is working, the other moves to a rest position at the edge of the construction platform. When its use occurs, the first extruder moves into its waiting position. This prevents errors on the object. Because, the two pressure nozzles continuously side by side, can unwanted material from the nozzle of the stationary extruder exit, or this will damage the object with scratches.
Calibration with dual-head extruders: Separately controlled print nozzles such as the Printupy of 2Printbeta must be precisely adjusted so that They work without any displacements on an object. As with most 3D printer models with display, you can carry out the calibration procedure on the display. Given drive the two print heads first into the rest position ( Home position). On the display, select Prepare -> Home All. This causes the printer to move all axes to the zero position. Now measure the distance between the two pressure nozzles accurately with a ruler or gauge. Enter this value in the display under Control -> Motion -> Offset X in millimeters. Now measure the distances of the individual nozzles in the Y direction – that is, to the end of the building platform on the front side – and calculate the difference between these two values. Enter the thus determined differential value on the display under Control -> Motion -> Offset Y. Save your entries by confirming them with “Set” or “Ok”. The pre-calibration is done with it.
Fine adjustment of print heads: Now print a test object, so you can check how well the two extruders are adjusted. To this end, most manufacturers supply sample items on the SD card. Select “Print from SD” from the main menu on the display, as well as a test object using both extruders. Small objects such as cubes are best suited to make a picture of the calibration level. They do not last very long and quickly reveal how good the setting of the print heads is. If the extruders deviate from the ideal position, correct the settings under Control -> Motion -> Offset X and Control -> Motion -> Offset Y accordingly. During initial installation, you may have to repeat the process several times.