Watchmaking micro-dispensing

Challenges to face

For a reliable micro-lubrication process, several parameters must be mastered, such as:

• Process repeatability weaknesses.
• Homogeneity variations of the deposited products.
• Impact of external physical variations, such as temperature or humidity.
• Adequacy of pressure control.
• More and more small and complex components and sub-assemblies.
• Effective operating time.
• Sedimentation effects.
• Factors that influence the quantity deposited.
• Cleaning and purging cycles system performances.

The proposed solution:

• A micro-dispensing competence center to carry out functional tests.
• A micro-lubrication head installed on a high rigidity multi-axis gantry, itself mounted on a granite base.
• A concept not dependent on environmental influences, such as temperature, humidity or air pressure.

Auto-calibration of the needle position in space:

• Consumable change without adjustment.
• Correction over time.

Vision-driven system:

• Automatic recipe loading according to the detected component.
• Spatial positioning of the component.
• Control and adjustment of the dosed amount.

Automatic needle cleaning

Key features:

• Up to 5 numerical axes.
• Compatible with all dispenser types.
• Droplet deposition needle accuracy of ± 10 µm.
• 1.0 nL minimum volume, with ± 5.0% repeatability.
• 2 seconds cycle time per drop.

Applications examples:

• Lubrication of all types of watch supplies.
• Bearing greasing.
• Incabloc® (shock absorber) lubrication.

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