Chapter 66-16.1 Construction6.1.1 Specifications, Control Mechanism, and Functions 0006-9404iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /Laser LightT-6-1Scanner MotorT-6-2Polygon MirrorT-6-3Control MechanismT-6-46.1.2 Major Components 0006-5970iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /F-6-1T-6-56.1.3 Construction of the Control System 0006-5971iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /The laser exposure system is primarily controlled by the DC controller PCB.iR2270/2270F/2870/2870F/2230/2230F/2830Number of laser beams 2Output 5mW (iR2270/2870/2230/2830)10mW (iR3570/4570/3530)Wave length 785 nm - 800 nm (infrared light)Type of motor DC brushless motorNumber of revolutions 16000 rpm (approx.; single control)(iR2270/2870/2230/2830)27000 rpm/16000 rpm (approx.; double control)(iR3570/4570/3530)Type of bearing OilNumber of facets 6 (40-mm dia.)Synchronous control Main scanning directionLight intensity control APCOthers Laser activation/deactivationLaser scanner motor controlLaser shutter controlName Description[1] Laser unit Generates laser light[2] Polygon mirror Scans laser light in main scanning direction.[3] BD mirror Reflects laser light in the direction of the BD PCB.[4] BD PCB Generates the BD signal.[1][2] [4][3]