Applies to: Z4

Filling the cooling liquid

The workflow for restoration is as follows:

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NOTICE

Damages caused by wet machining with unsuitable cooling liquid

Wet machining without suitable cooling liquid can damage the machine, tools and blanks.

  • Before you execute a job, ensure that the cooling liquid is clean and the liquid level is sufficient.
  • Only use cooling liquid that meets the requirements listed below.
  • If you use a cooling lubricant: Only add the cooling lubricant Tec Liquid Pro to the cooling liquid.
  • Exchange used cooling liquid according to the maintenance table. Clean the cooling liquid tank before refilling it.
  • If you use a cleaning agent, ensure that no residues of it remain in the tank.

The machine needs cooling liquid that meets the following requirements:

  • Drinking water
  • No added chlorine
  • No distilled water
  • No carbonated water

Without sufficient cooling liquid in the tank, wet machining is not possible. You will find the appropriate intervals in the maintenance table. Of course, you can exchange the cooling liquid at any time.

You need to exchange the cooling liquid in the following cases:

  • The liquid level lies below the min mark.
  • The change interval in the maintenance table has been exceeded.
  • The cooling liquid is soiled.
  • In case of a strong odor from or a biofilm on the cooling liquid.
  • If you use a cooling lubricant: The pH value is below 9.

Every time you exchange the cooling liquid, you must also clean the tank.

The cooling liquid tank is dishwasher-safe. If you use a dishwasher, select a cleaning program with a maximum temperature of 70 °C. To preserve the cooling liquid filter, remove it and clean it by hand.

Before every job, you also have to check the strainer basket and empty it if required.

  1. Close the working chamber door.
  2. Open the multi-purpose drawer.
  3. Grasp the cooling liquid tank at the positions marked in the following figure. Pull it out of the drawer in the direction indicated by the arrow.

    4. When you tilt the cooling liquid tank, the cover will not prevent the cooling liquid from leaking.

     

    Information on the disposal of cooling liquid and machining residues:

  4. If there is cooling liquid in the cooling liquid tank, empty and clean the cooling liquid tank.

    Exchanging the cooling liquid and cleaning the cooling liquid tank

  5. Lift the cover, including the strainer basket, off the cooling liquid tank.

    6.  

  6. Fill the cooling liquid tank with cooling liquid until it reaches the max mark.

  7. When machining titanium blanks: In order to achieve longer service life values, you can add the cooling lubricant Tec Liquid Pro to the cooling liquid. The mixing ratio is indicated on the bottle label. Determine the pH value of the cooling liquid. Determine the pH value of the cooling liquid

  8. Insert the strainer basket into the tank cover and put the cover onto the tank.

  9. Remove dirt and foreign bodies from the coupling of the cooling liquid tank and the counterpart in the machine.

    10. The coupling of the tank and its counterpart (colored green)

  10. Insert the cooling liquid tank into the multi-purpose drawer with the help of the guide rail (marked orange).

    11.  

  11. Push the cooling liquid tank into its end position until it is properly attached to the machine.
    • The cooling liquid tank is connected to the cooling liquid system via the coupling.
  12. Close the multi-purpose drawer.

Cooling lubricant

When machining titanium blanks:

  • In order to achieve longer service life values, you can add the cooling lubricant Tec Liquid Pro to the cooling liquid. The mixing ratio is indicated on the bottle label. Determine the pH value of the cooling liquid. Determine the pH value of the cooling liquid

Tec Liquid Pro is available from customer service.

Determine the pH value of the cooling liquid

If you added cooling lubricant to the cooling liquid, you need to check the pH value of the cooling liquid to determine whether you need to exchange it.

  • Determine the pH value of the cooling liquid directly after adding the cooling lubricant and when you didn’t use the machine for 2 days.
  • To determine the pH value of the cooling liquid with test strips, do the following:

Test strips are available from customer service.

  1. Hold one test strip into the cooling liquid for a few seconds.
  2. Compare the colors on the test strip with the indications on the container of the pH test strips.
    • The colors on the test strip match the pH value 9 on the container.

Used pH test strip (right) and indications on the container

  1. The pH value as indicated on the container
  2. Colors as indicated on the container
  3. pH test strip that was used to test the cooling liquid
  • If the pH value is below 9 or if the change interval in the maintenance table has been exceeded, exchange the cooling liquid.