Content
Common Features of Kohzu Manual Stages
Actuator Solutions and Options
Micrometer
Kohzu standard micrometers offer precise ground-screw positioning and 10 micron resolution measured
on laser etched vernier-scale along actuator body.
Differential Micrometer
Kohzu differential micrometers offer both coarse and fine position adjustments in a single actuator.
Coarse and fine actuator resolutions are 10 and 0.5 microns respectively.
Fine Pitch Positioner
Kohzu's Fine Pitch Positioner (FPP) was developed for precise positioning of optical fibers and wave-guide components. It has both coarse and fine position adjustments, a minimum resolution of 0.5 microns and an unrivaled 0.05 micron sensitivity.
Handle-Wheel
Kohzu handle-wheel actuators with 25 or 50 divisions per revolution or no scale are also available. Device
resolution is calculated by dividing lead-screw pitch by the number of divisions on the actuator barrel.
Actuator Specifications
| Model Number | Motion Range | Minimum Readout or Resolution | Thread Pitch | Maximum Axial Load or Axial Load Max. | |
Micrometer | MHT4-6.5 | ±3.25mm | 10μm | 0.5mm/p |
| |
MHS4-13 | ±6.5mm | 10μm | 0.5mm/p |
| ||
MHK15 | ±6.5mm | 5μm | 0.5mm/p |
| ||
MHN4-25T | ±12.5mm | 10μm | 0.5mm/p |
| ||
MHG1-25W | ±12.5mm | 2μm | 0.5mm/p |
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MHH2-50T | ±25mm | 10μm | 0.5mm/p |
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Differential Micrometer (coarse, fine) | MHF | Coarse | ±6.5mm | 10μm | 0.5mm/p |
|
Fine | ±100μm | 0.5μm | 0.025mm/p |
| ||
Fine Pitch Positioner (coarse, fine) | FPP | Coarse | ±6.5mm | 1mm | 0.5mm/p | 5 |
Fine | ±150μm | 0.5μm | - |
| ||
Handle-Wheel | 25 divisions per revolution |
|
| ZM07A-S6, |
| |
50 divisions per revolution |
|
| ZM07A, |
| ||
no scale |
|
| SHxx-xx |
| ||
Locking Mechanisms
Caliper-Lock
The caliper-lock is used on most linear travel stages. In this mechanism locking is achieved by clamping two flat metal calipers against both sides of a flexible stainless plate (in similar fashion as calipers on a disc brake) by tightening a knurled thumb-screw. The benefit of this mechanism is positive locking with minimal lateral position displacement.
Spring-Plate Lock
Kohzu's spring-plate locking mechanism is used on all swivel-arc stages. It uses a flexible plate that deflects when locking screw is tightened. This minimizes lateral position displacement of stage mechanism.
Actuator-Lock
Actuator-Lock is used to vertical linear stage.
Rotary Stage Table-Lock & Travel-Stop
Kohzu manual rotary stages are fitted with two separate locking mechanisms. First is a table-lock used to lock coarse rotation. The second lock is an actuator travelstop and is used to prevent fine rotation produced by stage actuator. The travelstop restricts forward (CW) actuator travel. However, it does not impede reverse (CCW) actuator travel. Stages fitted with FPP differential actuators do not include a travel-stop, because it can damage the FPP actuator if improperly used.
Options
Lubricant Exchange
Stage lubricants can be exchanged for clean-room and vacuum applications with
strict lubrication requirements. This option is offered at additional cost.
- Clean grease: LG2 from NSK LTD.
- Vacuum oil: Fonblin YH-VAC140 / 13 from Solvay Solexis, Inc.
- Affected parts
1. Guide: ball race, sliding surface of ball bearing, crossed roller bearing.
2. Feeding mechanism: worm and worm wheel, wedge, rack and pinion
3. Micrometer (exclude MH20-3 and Fine Pitch Positioner FPP03-13)
- Clean grease: LG2 from NSK LTD.
- Vacuum oil: Fonblin YH-VAC140 / 13 from Solvay Solexis, Inc.
- Affected parts
1. Guide: ball race, sliding surface of ball bearing, crossed roller bearing.
2. Feeding mechanism: worm and worm wheel, wedge, rack and pinion
3. Micrometer (exclude MH20-3 and Fine Pitch Positioner FPP03-13)
- Effectiveness of grease change
Clean grease:
Although clean room grease aids in the reduction of particulate output, a specific cleanliness level cannot be guaranteed.
Vacuum oil:
Although Vacuum oil is low in particle emissions, specific degree of vacuum cannot be guaranteed.
Lock Screw
The standard knurled locking screw can be exchanged with a hex-head screw
in applications with limited space or higher locking-torque requirements.
Stage Installation
Mounting Kohzu stages is quick and simple. Mounting holes are provided on stage base and are counter-bored for standard metric socket-head screws. To access mounting holes (two at a time) move stage to each end of travel. Kohzu also offers a selection of adapter plates to facilitate stage mounting to third-party devices with custom bolt patterns. See page 230-231 for available adapter plates.
