1. The flatness of the bottom surface of the single-axis manipulator installation is not up to standard.
The installation bottom plane of the single-axis manipulator is too large, which will lead to the forced locking of the bottom surface of the electric slide table, resulting in the strong bending deformation of the bottom surface of the slide table, linear guide rail and ball screw. At worst, it will increase the running resistance of the single-axis manipulator, and at worst, the electric slide table may not be able to operate, which will greatly shorten the life of the electric slide.
According to the accuracy level of the single-axis manipulator, the flatness of the installation bottom surface of the general ordinary grade should be less than 0.05mm/m. For the precision level, the flatness of the bottom surface of the installation should be less than 0.02mm/mm.
2. The locking sequence of the bottom fixing screw of the single-axis manipulator is incorrect.
The bottom fixing screw of the single-axis manipulator should follow the principle of locking in the middle first, then the two ends, and in turn. If the two ends are locked first, the arch deformation variable caused by deformation cannot be eliminated, resulting in the linear guide rail can not run smoothly, and the walking parallelism and straightness accuracy will be reduced.
3. The motor shaft of the single-axis manipulator and the end of the lead screw shaft are not concentric.
Although the coupling can eliminate a certain degree of eccentricity, if the concentric runout value of the screw shaft end of the single-axis manipulator and the motor shaft exceeds the allowable range of the coupling, it will accelerate the damage of the coupling, resulting in abnormal coupling noise, or shrapnel breakage. It should be avoided as much as possible.
4. The installation height of the multi-axis gantry combined manipulator on both sides is uneven.
When the mechanical arm is installed in gantry type, if the height of the guide rails on both sides is uneven, or the parallel two slide tables are not parallel, the electric slide table will be held and the damage of the electric slide table will be accelerated.
5. The tension of the synchronous belt of the single-axis electric slide table is too loose or too tight.
The tension of the synchronous belt of the electric slide table should be kept moderate, and the belt tension is too tight, which will make the tension of the synchronous wheel and the synchronous belt too large, and produce abnormal noise. If the belt tension is too loose, it will cause clearance in the transmission process, reduce the accuracy, and in serious cases, it will produce tooth jumping. The tension degree of the timing belt is generally determined by the tension force and deflection, and the measurement method is: use the thrust meter to press down the vertical direction of the midpoint of the belt, and measure the deflection value when a certain amount of installation force is applied. Reference values for different center distances and belt sizes.
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