planar magnetic scale linear magnetic tape and magnetic

f planar magnetic scale linear magnetic tape and magnetic tape two kinds of coaxial line.
Planar linear magnetic tape
The magnetic tape and metal engraved lines have a structure similar to the feet of A and strip aperture similar. Magnetic tape strip is installed with a special metal frame. Magnetic tape the tape-shaped metal bracket with a certain tension to the stress of the middle of the frame or support, the magnetic scale and the thermal expansion coefficient of the machine frame or close to the thermal expansion coefficient. The work head and the Magnetic Grate tape contacts, magnetic tape as a flexible strip, to allow a certain deformation. This magnetic tape can be done relatively long, generally do more than 1m in length. Coaxial linear magnetic tape This is a round rod of 2mm in diameter made of magnetic tape, the head is a special structure, it is the bag in the middle of magnetic tape, the track is a multi-gap type magnetic head in response. The advantage of this structure is the output signal, high accuracy, good anti-jamming, the disadvantage is not easy to do for a long (typically 1.5m less), thermal expansion coefficient, usually applied to small precision machine tools and measuring machines.