Page 74 - RoboCilindri, RCP2-RCP3, robocilindri, sinta,

Technical InformationExplanation of Terms(This terminology is related to IAI products, and so the de nitions are more limited than usual.)10,000km service lifeAround 10000 hours are guaranteed for actual use in the field. When considering the speed, work ratio, etc, this translates to a distance of 5000 to 10000km. While the life of a guide is sufficiently long for radial loads, it is the uneven loads due to moment loads that are problematic to its service life.For this reason, the 10000km service life is established by specifying the rated dynamic load moment that can guarantee 10000km of travel distance.50km service lifeA way of expressing the allowable load capacity, submitted by the guide manufacturer. This is the value at which the probability of the guide not breaking (i.e. survival probability) when used with this allowable radial load (basic dynamic rated load) is 90%.Calculating the actual distance of travel, considering the motion velocity and work rate, etc, an actual industrial equipment, it is necessary to ensure 5000km to 10000km of travel. From that viewpoint, this data is difficult to understand and difficult to utilize.A-phase (signal) output / B-phase (signal) outputThe direction of rotation (CW or CCW) of the axis is determined from the phase difference between the A-phase and the B-phase of the incremental encoder output, as shown in the diagram below. In a clockwise rotation, the A-phase is ahead of the B-phase.BacklashAs shown in the figure on the right,there is a gap between the nut andthe ball (steel ball) and the screwshaft. Even if the screw shaft moves,the nut will not move the extent ofthe gap. The mechanical play in thedirection of this slider movement is called the backlash. The measurement method used is to feed the slider, then use the reading for the slight amount of movement time shown on a test indicator as a standard. Also, in that condition, without using the feed device, move the slider in the same direction with a fixed load, then without the load. Then find the difference between the standard value and the time when the load was removed. This measurement is conducted at the midpoint of the distance of movement and at points nearly at the two ends. The maximum value obtained among the values is used as the measurement value.BellowsA cover to prevent the infiltration of dust or debris from outside.BrakePrimarily used for the vertical axis to prevent the slider from dropping when the servo is turned off. The brake activates when the power is turned off.C10One of the grades of a ball screw. The lower the number, the higher the precision.Grade C10 has a typical movement error of ±0.21mm for a 300mm stroke.CCW (Counterclockwise rotation)Abbreviation for counterclockwise rotation.It describes a rotation to the left, as viewed from above, i.e. opposite of the rotation of a clock's hands.Axial gapNutScrew shaftDiagram of Output ModesClockwise (CW) 360° (1T)A-phaseB-phasePhase difference*Z-phaseCounterclockwise (CCW)A-signalB-signalPhase difference*180°* The B-signal is ahead by 90° (T/4) not the mechanical angle.* The A-signal is ahead by 90° (T/4)Note: 360° (1T) in reference to the electrical angle,Absolute positioning accuracyWhen positioning is performed to an arbitrary target point specified in coordinate values, the difference between the coordinate values and the actual measured values.100.00 0Technical Reference/Information Appendix: - 18