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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 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.

  • 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 (for the disposable tray – 4.84.95mm), 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 18.

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.

Find the two extremes. One corner is most likely the highest and the opposite is the lowest. We recommend adjusting the higher number to make it lower.

14. Find the difference between the two extremes and divide that number in half to figure out the adjustment amount.

For example block 1 is measuring 4.9 and block 9 is measuring 4.7. The difference is 2 mm (200 microns). Divide this number in half to get 100 microns. That would equate to a 1/4 turn adjustment.

15. 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).

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

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

18. Tap Settings | Move & Calibration | Home Calibration in Envision One Control Software.
→ The following screen appears with a list of material trays. The material trays included in the list have been calibrated and the calibration data is saved. The numbers on the right of the material tray name show the number of prints done for each material tray.

  • If you have already calibrated the platform position with this material tray, proceed to step 19.
  • If you want to add a new material tray, proceed to the Adding a new material tray subsection.

19. Find the serial number or name of your material tray in the list and tap it.

→ The warning message appears asking if you are sure you want to recalibrate the existing material tray. Confirm by tapping OK.

→ The following screen appears.

20. 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.

21. 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.

22. 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.

23. Tap [Save].

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

Adding a new material tray

If you want to add a new material tray to the list, proceed as follows:

Tap Settings | Move & Calibration | Home Calibration | Add New Material Tray.

→ The following screen appears.

If your material tray has the serial number:

1. Tap [With S/N].

2. Find the serial number on the front of your material tray and enter it into the field on the screen that appears.

3. Tap [OK].

→ The following screen appears.

4. Move to step 20 of the instructions above to complete the calibration.

If your material tray does not have the serial number:

1. Tap [Without S/N].

2. Name your material tray and enter the name to the field on the screen that appears. The name should contain 7 digits from 0 to 9.

3. Tap [OK].

→ The following screen appears.

4. Move to step 20 of the instructions above to complete the calibration.

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