FAQs Guide on Manual Positioning Table

Jan 11, 2024

Manual Positioning Table Conditions and Methods of Use


Q: What are the regulations on the flatness of the installation object (workpiece) or installation place?

A: When mounting a workpiece with rough flatness or mounting it on an object with rough flatness, the slide surface may deform, possibly affecting accuracy. (The flatness should be approximately within 10μm.) Please confirm the flatness of the workpiece and mounting surface.


Q: After positioning, lock the clamp on the opposite side of the micrometer, but the manual rotating slide still moves slightly. Is the usage method wrong?

A: When using a manual rotary slide, slight movement may be normal even when the clamp opposite the micrometer is locked. Make sure you have correctly operated the manual rotating slide for approximate positioning. Our company's manual rotating slide design allows fine adjustment after rough positioning. This micro-movement capability is to better meet your needs.

Lock the coarse adjustment clamp first. The specific operation sequence is as follows.

① Adjust the feeding part to the target position (can be adjusted 360 degrees)
② Lock the coarse adjustment clamping part and fix it
③ Adjust the micrometer to the target position
④ Lock fine adjustment clamping part


Q: On the opposite side of the rotating positioning table, is the direction of reading (0~360°) counterclockwise?

A: Readings (0 to 360°) are recorded in clockwise order. Same goes for LR (inverse).


Q: There are three types of clamping methods (standard clamping, disc clamping, and opposed stop screws). What are the features of each?


◆Standard clamping
Lock the clamping handle and fix the clamping plate to the side of the slide table with a resin ring.

◆Disc clamping
The disc brake is fixed to the side of the slide with a clamping handle.
Reduces the load on the slide body and suppresses movement during fixation.

◆Opposite stop screw
Press the bolt from the opposite direction of the micrometer (feed screw).
Then tighten it with a nut to have a strong fixing force.


Q: The positioning table is used to adjust the initial position of the CCD camera. After adjustment, the position is misaligned when clamping. What can I do?

A: There is a "disc clamping" clamping option.
The disc brake is fixed to the side of the slide with a clamping handle.
Reduces the load on the slide body and suppresses movement during fixation.


Temperature / Vacuum / Vibration, etc. Usage Environment


Q: Is there a limit to the operating temperature range of manual positioning table?

A: The operating environment of positioning table.

Operating environment: 10~50℃, 20~70% RH (no condensation)
Recommended operating environment: 22±5℃, 20~70% RH (no condensation)


Q: Can it be used in environments with temperature changes?

A: Yeah, it can use. However, thermal expansion and contraction of components will occur when the temperature changes. If it is a precise measurement, it is recommended to use it at a certain temperature. If the temperature changes greatly, let the slide adapt to the temperature for a few hours before using it.
※There is no measurement data for temperature changes.


Q: Is there an environment where the slide table cannot be used (using NG)?

A: Please avoid using it in the following places.
・Places with a lot of dust and dust (especially metal powder)
・Places near fire candles ・Places with water or oil
・Places with a lot of salt and organic solvents ・Places with vibration and shock
・Places with corrosive gases and flammable gases ・Places with direct sunlight and radiant heat


Q: Because I want to do environmental testing, I want to use it under high humidity (70 to 90%, etc.) conditions. Is it usable?

A: When used in high humidity conditions, the guide rails may become rusty. Not recommended.


Manual Positioning Table Seclection


Q: The installation of the positioning table is restricted. Is the positioning table shown in the sample drawing a center stroke?

A: In principle, all slides have center stroke.

 ◆Manual positioning table
The amount of movement is expressed in ±.
For example, in the case of ±10mm, take the position shown in the drawing as the center, move 10mm in the negative direction, and 10mm in the positive direction.
(※Full stroke 20mm)
◆The automatic slide movement is expressed in full stroke. For example, when the movement amount is 100mm, it is centered on the position shown in the drawing and moves 50mm in the + (CW) direction and 50mm in the - (CCW) direction.

There are exceptions for manual Z-axis slides.


Q: A product with a load capacity of 20kgf would like to carry a workpiece of 22kg. If it exceeds 2kg, will the slide be damaged?

A: The critical weight that the slide table can bear is defined as the load-bearing capacity.
When overloaded, it will not be damaged immediately.
However, the product life will be shortened, and even if there is no problem with the driver, the performance on the sample may not be achieved.


Definition of Precision


Q: What's difference between allowable moment load and moment rigidity?


◆Allowable moment load [Unit: N・m]
Maximum moment load that can be applied to the slide surface.
※Permissible criteria
1. The operational feel is not significantly weakened
2. After uninstallation, the accuracy is still within the sample guaranteed value.
◆Moment rigidity [unit: “/N・cm]
Relative to the surface of the slide table, the displacement angle per 1N·cm centered on the moving surface of the slide table when a moment load is applied in any direction such as up and down swing, left and right swing, or axial rotation.

※Based on the distance from the center of the slide table moving surface (upper surface).


Q: What is the definition of swinging up and down, shaking left and right, and axial rotation?

◆Swing up and down
Axial rotation of vertical (left and right) intersecting axes relative to the forward direction (front and back)
→tilt up and down

◆Shake left and right
Axial rotation of vertical (up and down) intersecting axes relative to the forward direction (front and back)
→Tilt left and right

◆Axis rotation
Axial rotation relative to forward (front and rear) axis


Q: What is the difference between straightness, up and down swing, and left and right swing?


◆Straightness [unit: μm]
・The maximum offset (distance) in the horizontal or vertical direction relative to the ideal movement axis
◆Swing up and down [unit: "]
・Maximum vertical angle change value
◆Shake left and right [unit: "]
・Maximum horizontal angle change value


Q: What is the difference between straightness and verticality of Z axis/motion in the horizontal plane?


◆Straightness of movement [unit: μm]
・The maximum offset in the horizontal or vertical direction relative to the ideal movement axis

◆Verticality of movement [Unit: μm]
・Fix the Z-axis slide table and right-angle reference device on the reference surface.
・Place the displacement meter against the right-angle reference and measure the value in the Z-axis direction as the verticality.


Q: What is the difference between the eccentricity and surface runout of a rotary slide?


◆Eccentricity [unit: μm]
・The amount of horizontal displacement of the rotation center axis is regarded as the amount of eccentricity

◆Surface runout [unit: μm]
・The outer edge of the moving surface of the slide table fixed on the reference plane is used as the measurement point, and the maximum displacement difference relative to the reference plane after one rotation is used as the surface runout amount.


Q: What is the difference between parallelism and motion parallelism?


◆Parallelism [Unit: μm]
・Fix the slide table on the reference plane.
・Measure the parallelism of the moving surface relative to the reference plane over the entire surface, and take the maximum height difference as the parallelism.

◆Parallelism of motion [Unit: μm]
・Fix the slide table on the reference plane.
・Measure the displacement between the reference plane of each positioning point and the measuring equipment fixed on the moving plane.
・The maximum difference is used as motion parallelism


Repair and Maintenance


Q: Is there any problem trying to replace the clamping screws myself?

A: It is best not to modify it. Undesirable problems such as poor accuracy, product wear, and deterioration may occur.
There are also some customers who have replaced the clamping screws without any problems. Please understand that modified products are not covered by the warranty.


Q: Does the positioning table have a useful life?

A: There is no useful life requirement. An approximate service life cannot be estimated based on changes in the usage environment (temperature, humidity, etc.), load method, frequency of use, and other factors.


Q: Are there any regulations or recommendations for grease refilling frequency?

A: No matter what kind of grease it is, there is no specific standard for regular refilling. The refilling frequency varies depending on the driving conditions and guide rail type. Customers can check the status of the grease once a month and refill the grease as needed.