The MPS system is an option for CNC machining centres with matrix table, mainly to facilitate the use of suction cups.

Problem:

In the case of matrix tables, the vacuum is usually provided via holes that are distributed at regular intervals across the table. These holes are provided with caps which can be removed, replaced or screwed in as required.

When using suction cups on matrix tables, there must be at least one open hole under each suction block; all other holes in the table must be closed. This results in a considerable set-up effort when moving the suction cups.

How the MPS system works:

With the MPS system, needle valves are located in the holes for the vacuum instead of the caps. These needle valves protrude slightly above the table level and open as soon as they are slightly pressed in. This would therefore be the case when a workpiece or a vacuum block is placed on the table. This completely eliminates the need to open and close the vacuum holes manually, which makes set-up considerably easier, especially when workpieces are changed frequently.

Disadvantages:

• Depending on table size and number of valves, a considerable surcharge may apply.
• The valve needles protrude slightly above table level and are potentially very susceptible to damage from workpieces that are horizontally shifted on the machine table. This was taken into account in the design by the conical shape and a robust construction. However, due to the high number of valves (especially on larger tables) there is always a certain risk of failure due to damage caused by strong horizontal forces.
• If there is a lot of fine wood dust on the table surface and a vacuum cleaner or a workpiece is placed on it without prior cleaning, there is a great risk that dust will enter the valve and damage it or deposit in the seal, thus preventing it from closing completely.