How to choose a magnetic grid ruler reading head? 5 key considerations for industrial high-precision displacement detection

Choosing a magnetic grid ruler reading head is not as simple as "buying a ruler". Resolution, range, interface, protection, and installation all directly determine whether it can work stably on your device. Below are 5 key considerations to break down.

1、 Resolution: How detailed do you want?

The Atorm MRR series offers multiple resolutions of 1 μ m/5 μ m/10 μ m:

Precision machining, micro displacement comparison → prioritize 1 μ m level;

Conventional positioning and in place triggering → 5 μ m/10 μ m is usually sufficient.

The higher the resolution, the better. It should match your accuracy requirements and electrical control capabilities. Excessive resolution may result in cost and signal processing burden.

2、 Range and stroke: How long is the ruler?

Confirm the maximum travel of the slide table/actuator, select a ruler to cover the travel and leave a margin;

Multi axis equipment should confirm the stroke of each axis separately;

Pay attention to the straightness and fixing method of the ruler body during long-distance installation.

3、 Output interface: Who should I talk to?

Common outputs need to match the interface protocol of the device's electronic control or upper system;

If it is necessary to connect to the bus or trace to the upper level, confirm the communication and data format in advance;

The output form of the trigger signal (triggered when in place) should also be aligned with the device logic.

4、 Protection level: Can the workshop environment withstand it?

There are many oil stains, dust, and coolant in the workshop. Pay attention to the protection level and sealing design;

Non contact reading itself reduces the misalignment caused by mechanical wear and tear;

If there is water splashing or oil mist, confirm whether the shell and joint protection meet the requirements.

5、 Installation method: Can it be installed properly or correctly?

Confirm the relative installation space and parallelism requirements between the reading head and the magnetic ruler;

Special aircraft with limited space should prioritize compact structures;

Installation deviation will directly affect accuracy. If necessary, please ask the manufacturer to assist in calibration.

6、 Quick selection checklist

|Consideration dimensions | Key issues | Suggestions|

||||

|Resolution | What is the required precision | Choose 1/5/10 μ m according to your needs|

|Travel | Maximum travel of slide table | Length covering travel+margin|

|Interface | What system to interface with | Matching electronic control/bus/trigger output|

|Protection | Workshop environment | Pay attention to protection level and sealing|

|Installation | Is the space sufficient | Compact structure+manufacturer calibration|

&Reminder: The specific model and installation method need to be confirmed based on your model, travel, and accuracy requirements. It is recommended to contact the manufacturer for 1V1 selection.

7、 One sentence summary

When choosing a magnetic grid ruler reading head, first think about five things: "how thin to go, how far to go, who to talk to, how dirty the environment is, and whether it can fit". Clearly state the requirements, and the selection will not be difficult.