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Equipment:

  • Digital calipers
  • Scraper
  • Material
  • RFID material tag
  • 1,5 mm Allen wrench
  • 3 mm Allen wrench
  • Post-processing materials
  • Home Position Calibration Cubes.stl file

To check, modify, or fine-tune the printer’s parallelism and home position, a Home Position Calibration Cubes.stl file is printed. The printer must be powered on for the duration of the parallelism calibration, and the home position calibration.

Always remove the platform before taking the material tray out of the printer!

Failure to do so can result in material dripping down into or onto the printer causing failed builds and damaged equipment!

Parallelism is achieved when the platform and material tray are aligned with each other. Home position is the lowest point of the build platform along the Z-axis, it is the start position of the build platform for printing.

1. Download the .stl file to the computer where the Envision One RP software is installed.

2. Open the Envision One RP software and select a buildstyle. See the Envision One RP® User Guide provided with the printer for details.

3. Import the .stl file into the Envision One RP software.

Home Position Calibration Cubes.stl is a file made of nine blocks, each block is five millimeters high. This file is located on the USB-drive that is shipped with every Envision One cDLM printer. The file is also available to download by contacting EnvisionTEC support, or an authorized distributor.

4. Print the Home Position Calibration Cubes.stl.

5. Once the print has completed, check if there are nine cubes on the platform.

6. If any of the cubes are missing, tap the icon and remove any cured particles that settled to the bottom of the material tray.

7. Gently remove the calibration blocks from the build platform using the scraper that came in the starter kit.

8. Clean and cure the models.

9. Take a close look at each printed block. There is a small number printed on each cube.

10. Measure the height of each cube and write down the values.

  • 8. If all the blocks are within +/- 100 microns, the printer is paralleled, and no further actions need to be taken at this time.
  • If all the blocks are within 4.90 and 5.10 mm, the printer’s home position is correct, and no further actions need to be taken.

11. If the home position is correct and the printer is not paralleled, move on to Step 12. If the printer is paralleled and the home position is not correct, skip to Step 17.

12. Using the 1.5 mm Allen wrench, unlock all four locking screws by turning them two full rotations to the left.

13. Reference your values in Step 10 to determine which side needs adjustment. Most often, one corner needs to be either raised or lowered in order to even out the height measurements of the calibration cubes.

14. Using the 3 mm Allen wrench, apply adjustments cautiously and precisely.

To increase the height measurement:

  • Turn the outer screws, or Set Screws, counter-clockwise (e. g. ¼ turn= 100 microns).
  • Turn the inner screws, or Driving Bolts, clockwise (e. g. ¼ turn = 100 microns).

To decrease the height measurement:

  • Turn the inner screws, or Driving Bolts, counter-clockwise (e. g. ¼ turn= 100 microns).
  • Turn the outer screws, or Set Screws, clockwise (e. g. ¼ turn = 100 microns).

15. To lock the adjustments in place, turn the Locking Screws two full rotations to the right.

16. Remove the platform from the printer and place it aside on a clean work surface.

17. Tap Settings | Move & Calibration | Home Calibration | Manual Homing in Envision One Control Software.

18. Set the value of a step by tapping the and + icons of Step Value. This is the increment used for the Motion Distance. The Step Value increments can be set to 0.01, 0.10, 1.00, and 10.00.

19. Set a motion distance of the platform by tapping the and + icons of Motion Distance. This is the total distance the platform moves.

The positive values move the platform up; the negative values move the platform down.
Tapping the icon resets the motion distance value to zero.

20. Reference the values in Step 10 to determine the new home position. The adjustment should be made based on the average height of the calibration blocks.

  • If the average height measurement is below 4.90 mm, move the platform up tapping [Move] the required number of steps.
  • If the average height measurement is above 5.10 mm move the platform down tapping [Move] the required number of steps.

21. Tap [Save].

→ The build platform holder starts moving up to the top of the Z-axis.
→ The new home position is set.

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