Description
xThe ERM280 is a high-accuracy rotary encoder (position detector) manufactured by Heidenhain and used as a spindle/C-axis feedback encoder in CNC machine tool systems. It provides extremely precise angular position data that a CNC controller or drive uses for C-axis control, spindle orientation, and high-accuracy motion feedback.
👉 In Mitsubishi CNC documentation, ERM280 is listed as a “spindle side accuracy serial output encoder” used as an option for precise C-axis control in spindle drives.
📌 Key Technical Details
📍 Encoder Variants
The ERM280 series comes in multiple line-count / resolution variants, such as:
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ERM280 1200
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ERM280 2048
These differ mainly in resolution (number of scale marks) and maximum rotational speed.
📏 Resolution & Precision
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ERM280 1200:
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Minimum detection resolution: ~0.0000183° (≈ 19,660,800 counts/rev)
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Compatible max speed: ~20,000 rpm
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ERM280 2048:
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Minimum detection resolution: ~0.0000107° (≈ 33,554,432 counts/rev)
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Compatible max speed: ~11,718 rpm
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These extremely fine angular resolutions make the ERM280 suitable for very precise spindle positioning and C-axis control in advanced CNC operations.
🧠 How It Works in Systems
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The ERM280 itself is mounted on the spindle or its gear/mechanism and uses magnetic or optical scanning techniques (depending on exact model) to detect rotational position.
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Its raw signals (often SIN/COS or A/B signals) are typically fed into an interface/conversion unit (e.g., EIB192M/EIB392M). This unit converts them into a high-resolution digital serial output that Mitsubishi drives/controllers can use.
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These converters allow attachment to modern CNC/spindle drives for high-gain servo response and accurate motion feedback.
⚙️ Typical Applications
The ERM280 is used in applications like:
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C-axis machining and orientation
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Synchronous tapping and spindle indexing
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High-precision spindle speed/position feedback for servo control
Because of its high resolution, it is often chosen for advanced CNC machine tools where position accuracy is critical.
📌 Summary
| Feature | Specification |
|---|---|
| Type | High-accuracy rotary encoder (Heidenhain ERM280 series) |
| Purpose | Spindle/C-axis feedback in CNC systems |
| Resolution examples | 19,660,800 p/rev (1200) |
| Max speed | Up to ~20,000 rpm |
| Typical use | C-axis control, spindle orientation, high-accuracy feedback |
| Interface | Via serial conversion units (e.g., EIB192M/C4, EIB392M/C6) |
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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