Apparatus and method for writing a pattern in a substrate
AssigneesRenishaw PLC, Rls Merilna Tehnika D.O.O.
InventorsPeter Kogej, Matija Jezersek, Janez Mozina, Ales Babnik
Life of this patent
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Abstract
A method and apparatus are described for forming a pattern including one or more markings on a substrate. The method includes the step of forming each marking by locally heating the substrate, for example using a fibre laser. A step is also performed of monitoring the temperature of the substrate, e.g. using a temperature sensor, whilst each marking is being formed. The method may be used to form a magnetic encoder scale on a stainless steel substrate having a high content of martensitic material. The local heating causes the martensitic material to be transformed into austenitic material. An encoder scale made using the method is also described.
Claims15
A method for forming a pattern comprising one or more markings on a substrate, the method comprising the step of forming each marking by locally heating the substrate, wherein the method comprises the step of monitoring the temperature of the substrate whilst each marking is being formed.
Apparatus for forming a pattern comprising one or more markings on a substrate, the apparatus comprising;
- a heating device for forming one or more marking on a substrate, and
- a temperature sensing device for monitoring the temperature of the substrate whilst each marking is being formed by the heating device.
Dependencies are inferred from the claim text.