Linear Positioners Catalog_en-US_revA - Kollmorgen

Linear Positioning: Mechanical Drive ComparisonL I N E A R P O S I T I O N E R SThe following chart will help pinpointwhich linear drive mechanism isright for your application. Kollmorgenoffers many positioner options, suchas brakes, encoders, lubricationports, preloaded nuts, and precisionground screws, that may help youmeet your specification. If thesestandard options do not meet yourrequirements, please contactKollmorgen for information regardingcustom solutions.Considerations Lead Screw Ballscrew Belt DriveNoise Quiet Noisy QuietBack DrivingSelflockingEasilybackdrivesEasilybackdrivesBacklash Increases with wear Constant throughoutscrew lifeCan increase with wearor stretching of beltRepeatability +/-0.005” to 0.0005” +/-0.005” to 0.0005” +/-0.004”Duty CycleModeratemax. 50%Highmax. 100%Highmax. 100%Mechanical EfficiencyLife and MechanicalWearLowPlastic Nut - 50%Bronze Nut - 40%Shorter life due tohigh frictionHigh - 90% High - 90%LongerLongerShock loads Higher Lower LowSmoothnessSmooth operationat lower speedsSmooth operationat all speedsSmooth operationat all speedsSpeeds Low High HigherCost $$ Lowest $$$ Moderate $$$ Moderate82K O L L M O R G E N