Why Are Cam Indexers Ideal for Rotary Table Machines?
The use of rotary table machines is becoming more and more widespread, especially for some mass-produced assembly and processing machines, such as screw machines, which generally involve tapping hardware products. It is necessary to design drilling, tapping and riveting stations. Because both the disc and the fixture workpiece are heavier, the best choice for intermittent drives is the cam indexer.
What Causes Shaking on the Surface of the Disc in Automatic Turntables?
In practical applications, especially in the early stage of automatic turntable, the surface of the disc will shake at times, which should be analyzed from the following reasons.
Overload Conditions in Cam Indexers
The cam indexer is used under overload conditions, under the premise that the quality of the cam indexer is confirmed, the connecting flange fixing screw connected to the cam indexer and the disc, the stability of the cam indexer fixing table, and the installation and use of the automatic induction system are completely correct. The load of the indexer disc must be checked first. At the beginning of the indexer selection, the load on the system includes the sum of the weights of all components such as discs, fixtures, and workpieces. However, sometimes it can be due to theoretical data and practical usage. The generated parameter deviations, or the theoretical calculated values are close to the actual demand values, especially some technical parameters that are conservatively estimated in the design, will also exist, even if the coefficients in all aspects are the same, there will be deviations in use, in this case, from the point of view of cost savings, the disc can be emptied and the weight can be reduced, or the material can be changed or the fixture can be replaced, depending on the use of the fixture material.
Runout of the disc surface
If the disc is too thin, the entire system will be unstable or the disc surface will bounce. In this case, it is necessary to confirm whether the material used for the disc, the connection between the output flange face of the cam indexer and the surface of the disc is tight, and in addition, it is necessary to check whether the sensing reference position of the indexer, that is, whether the angle of repose of the indexer is consistent with the angle actually used.
The motor runs unsteadily
Many people in automated systems don't notice this aspect. It is this link that often has the problem of instability, because the cam indexer itself does not have a driving function, so the stability performance of the motor plays a vital role in the operation of the entire automation system. The input of current, the stability of the variable speed gear, and the selection of the motor speed ratio all have a fundamental impact on the rotation of the disc.