A method of forming a product using additive layer manufacture, comprising: forming the product as a series of layers, each layer being formed by fusing powder deposited as a powder bed by scanning the powder bed using a charged particle beam to form a desired layer shape; wherein, for each layer, the powder is fused by melting successive areas of the powder bed by scanning the charged particle beam using a combination of a relatively long-range deflector and a relatively short-range deflector wherein the relatively long-range deflector deflects the charged particle beam over a larger deflection angle than the short-range deflector, wherein the method comprises using the relatively long-range deflector to set a base position of the charged particle beam on the powder bed and using the relatively short-range deflector to scan the charged particle beam around the base position set by the relatively long-range deflector, the method further comprising repeated steps of using the relatively long-range deflector to set different base positions of the charged particle beam on the powder bed and using the relatively short-range deflector to scan the charged particle beam around each of the different base positions set by the relatively long-range deflector to trace a series of predetermined shapes (410a, 410b) on the powder bed, wherein the predetermined shapes combine to create the desired layer shape, the method further comprising repeatedly using the relatively short-range deflector to scan the charged particle beam to trace a predetermined shape of the series of predetermined shapes at each base position on the powder bed, and controlling the current of the charged particle beam and the scan speed of the relatively short-range deflector to raise and maintain the temperature of the powder bed evenly within the predetermined shape; wherein each of the long-range and short-range deflectors is an electromagnetic deflector, comprising Helmholtz coils, or an electrostatic deflector. forming the product as a series of layers, each layer being formed by fusing powder deposited as a powder bed by scanning the powder bed using a charged particle beam to form a desired layer shape; wherein, for each layer, the powder is fused by melting successive areas of the powder bed by scanning the charged particle beam using a combination of a relatively long-range deflector and a relatively short-range deflector wherein the relatively long-range deflector deflects the charged particle beam over a larger deflection angle than the short-range deflector, wherein the method comprises using the relatively long-range deflector to set a base position of the charged particle beam on the powder bed and using the relatively short-range deflector to scan the charged particle beam around the base position set by the relatively long-range deflector, the method further comprising repeated steps of using the relatively long-range deflector to set different base positions of the charged particle beam on the powder bed and using the relatively short-range deflector to scan the charged particle beam around each of the different base positions set by the relatively long-range deflector to trace a series of predetermined shapes (410a, 410b) on the powder bed, wherein the predetermined shapes combine to create the desired layer shape, the method further comprising repeatedly using the relatively short-range deflector to scan the charged particle beam to trace a predetermined shape of the series of predetermined shapes at each base position on the powder bed, and controlling the current of the charged particle beam and the scan speed of the relatively short-range deflector to raise and maintain the temperature of the powder bed evenly within the predetermined shape; wherein each of the long-range and short-range deflectors is an electromagnetic deflector, comprising Helmholtz coils, or an electrostatic deflector.