- Home
- News
  |
  |
 |
Press Release
July 5, 2016
Environmental resistance beyond the ordinary Absolute Assembly-type Linear Scale in the ABS AT1100 Series Launched
Mitutoyo Corporation (Headquarters: Takatsu-ku, Kawasaki City, Kanagawa Prefecture; President: Toru Nakagawa) has developed and commercialized its completely new highly contamination-resistant "ABS AT1100 Series Linear Scale" featuring its unique electromagnetic induction type linear encoder. This product will be introduced at home and abroad on July 1 this year.
These days, there is a growing demand for rugged scales intended for NC machine tools in machining centers subject to harsh environments, typically using a large amount of coolant, which has produced more requests for increased resistance to the effects of contamination.
Our electromagnetic induction absolute linear encoder "ABS AT1100 Series Linear Scale" meets this need by means of a detection principle overwhelmingly superior to conventional optical linear encoders in terms of resistance to contamination, enabling reliable feedback of absolute position.
This product will be launched at the 34th Motor Tech Japan (Exhibition Hall 8, Booth #BD-215), which opens on April 20, 2016 in Makuhari Messe.
Mitutoyo makes a social contribution by providing precision measurement for the continual evolution of manufacturing.
[Principle]
A magnetic field excited by current flowing in the excitation coil (1) of the detector induces current flow in a scale coil (2), and this is detected as an induced current in the detection coil (3).
This current is converted to a sinusoidal voltage signal (4) whose magnitude at any position is compared with the output signals from two similar coil systems in the detector. These other coils use different pitches so that the absolute position of the detector can always be calculated and does not depend on counting the voltage cycles from a reference position.
Since magnetic permeability between the coils is almost the same in air, water or oil, the electromagnetic induction type is characterized by excellent resistance to the effects of contamination by water and oil.
The ABS AT1100 series Linear Scale adopts this principle.
[Key features]
| ● | A new structure preventing intrusion of coolant and a highly coolant-resistant, dust-proof rubber material are used. This linear scale is designed for on-site operation, giving a higher level of reliability than conventional types. |
| ● | The air gap between the coils is about 0.4mm, four times larger than that of conventional optical or magnetic sensors, making it less likely to suffer failure due to accumulation of contaminants. The air gap between the coils is one of the world's largest for scales intended for machine tool applications. |
| ● | The frames multi-point mounting method are the de facto standard, achieving high resistance to vibration and impact. |
| ● | Mitutoyo's unique electromagnetic induction detection method uses a newly developed compact detector for the ABS AT1100 scale. |
| ● | The improved signal processing technique used for this scale achieves a precision six times higher than ever before, according to Mitutoyo. |
| ● | The slider positioning mechanism and the detection head unit are connected using universal joints of high rigidity, which eliminates the need for signal adjustment when they are mounted and makes the positional adjustment of the detection head easier. |
| ● | Fast serial interfaces from several vendors are supported to enable direct connection to NC controllers. |
[Product specifications]
| Detection method | Electromagnetic induction linear encoder |
| Maximum effective measuring length | 3040mm |
| Indication accuracy (20°C)* | (3+5L/1000)µm L=140 to 2040mm (5+5L/1000)µm L=2240 to 3040mm |
| Maximum response speed | 3m/sec |
| Section dimension | 85×37mm |
| Mounting method | Frame multi-point mounting method |
| Interface | Manufactured by FANUC Corporation, Mitsubishi ElectricCorporation or Siemens AG |
| Resistance to vibration / impact | 20g/ 35g L= 140 to 2040mm 20g/ 30g L=2240 to 3040mm |
| Operating temperature range | 0℃ to 50℃ |
| Option | Signal cable |
* L = difference in position feedback
