Manual Drives, 1/2″ Differential Micrometer

• Designed for Use with Our RollerBlock Stages
• Coarse Adjustment: 1/2″ (13 mm) Travel, 0.5 mm per Revolution
• Coarse Resolution: 5.0 µm
• Fine Adjustment: 300 µm Travel, 50 µm per Revolution
• Fine Drive Resolution: 0.5 µm

The DRV304 Differential Micrometer uses a unique mechanism that converts a relatively large displacement into a relatively small displacement of the center fine adjustment spindle. The design has the additional benefit of providing a uniform, smooth feel that is largely independent of loading. Coarse adjustment is provided via a knurled knob, while the differential adjuster features a large rubber grip which adds to the overall sensitivity of the unit. The coarse adjustment knob gives 1/2″ (13 mm) of total travel with 5.0 µm resolution, while the differential knob provides 300 µm of total travel with 0.5 µm resolution. The Ø3/8″ mounting barrel is compatible with a host of standard mounting equipment.

Manual Drives, 1/2″ Differential Adjuster

• Designed Specifically for Use in Our 1/2″ Travel Stages
• Coarse Adjustment: 1/2″ (12.7 mm) Travel, 0.5 mm per Revolution
• Fine Adjustment: 250 µm Travel, 25 µm per Revolution

The DM10 Differential Adjuster uses two internal leadscrews; one pushes the center spindle forward at 400 µm per revolution, and one pulls it back at 375 µm per revolution. The resultant total forward motion of the center spindle is just 25 µm per one complete revolution of the graduated knob. For more details on the operating mechanism of the DM10, please refer to the DM10 Operation tab.

Each graduation of the fine control knob is 0.5 µm. The coarse adjustment provides 1/2″ of travel with a screw pitch of 0.5 mm, which is lockable via a thumbscrew located on the mounting barrel.

If the fine adjustment knob on the DM10 is ever removed from the actuator body, it can be reattached. Please see the DM10 Knob Attachment tab for more details. Follow the reattachment instructions carefully so that the actuator functions properly.

If a longer travel range is needed we also offer our DM12 1″ Differential Adjuster.