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www.robocylinder.de5. Lead ScrewWhen using a lead screw type actuator, note the following:<Note>This type is suited for applications with low frequency of use. (As a point of reference, one motion per 10 seconds, 24 hours per day, 240 days per year = approximately 5 years)This is suited for applications in which the load capacity and load requirements are low. (1kg or less) Use for applications that do not require a positioning repeatability smaller than ±0.05mm.Set up in a place that allows for easy maintenance.6. Home PositionThe home position is the reference point from which the actuator determines the target position.Note that if the home position becomes misaligned, the target position also shifts by the same amount.<Note>Actuators with an incremental encoder must be homed upon power-on.During homing operation, the slider (rod, table) moves to actuator's mechanical end, and then reverses. Therefore, watch for any interference with its surroundings.By default, the home position is on the motor-side (i.e. the open side on the gripper type, or the left side on the rotary type (looking down at the output shaft.)) Optionally, the home position can be moved to the opposite side (i.e. away from the motor). To change the home position after the actuator has been delivered, it must be sent back to IAI for adjustment.Models without the option code "NM" do not support reversed home position.7. Encoder Type (Incremental/Absolute/Simple Absolute)There are two types of encoders that can be used in an actuator, "incremental" and "absolute" encoders.Incremental encoder ......................When an incremental encoder is powered off, its coordinate data is erased. Therefore, homing is necessary each time it is powered back on.Absolute encoder ...........................When an absolute encoder is powered off, it uses a battery to store its coordinate data. Therefore, homing is not necessary when it is powered back on. However, note that it cannot beoperated once the battery for storing data runs out.<Note>In addition to the above two types of encoders, there is the "simple absolute" type, which is an incremental encoder with a dedicated simple absolute unit connected to the actuator's controller, for storing its coordinate data. This eliminates the need for homing upon power- on. Note that the simple absolute actuators (encoders) fall under the incremental type and not the absolute type.8. Encoder Pulse NumberThe pulse number of the encoder varies depending on the actuator. See the table below for the pulse number of each actuator.9. MotorDifferent motors are used depending on the series. SeriesTypeEncoder Pulse NumberRCP3All models800RCP2All models800RCA2RN N/RP N/GS N/ GD N/SD N/TCA N/ TWA N/TFA N1048All other models800SeriesTypeEncoder Pulse NumberRCAAll models800RCLSA1L/RA1L715SA2L/RA2L855SA3L/RA3L1145RCS2SRA7BD3072All other models16384 Pre-42