![]() The app will install a folder on your computer called Google Drive, and you can drag photos and documents onto the folder to sync its contents with Google Drive on Google's servers.ĥ. If it asks, grant the app permission to access your photos.Ĥ. Follow the instructions to install it and sign in.ģ. If you haven't already, download Backup and Sync to your PC or Mac.Ģ. They are sometimes called three-dimensional cams or camoids.Google's Backup and Sync app for Windows or Mac will back up photos from your computer, camera or SD card to Google Drive and Photos, and the app will upload a copy to both Google services for you. Q: What if I want both axial and radial follower motion?Ī: Combined axial-radial cams are not unheard of. The diagram depicts an acceptable example of a single-dwell cycle. Once a suitable output motion is defined, the profile of the cam itself can be generated, often through special software. Obviously, the follower begins and ends the cycle at the same position. In a valid follower motion, the velocity and acceleration will remain continuous throughout the cycle - otherwise the device produces an impossible, infinite amount of jerk. ![]() Rocker followers often approximate straight-line motion adequately while remaining fixed about their arms.Ĭonsider this plot of cam dynamics: Cam design requires you to keep sight of the follower displacement and the first, second, and third derivatives: velocity, acceleration, and jerk. A follower with a wheel-type contact, though, must remain aligned. This can be used to help distribute wear by offsetting a flat-faced follower. ![]() Q: Which is preferable, rocker or slider motion?Ī: A translating follower (slider) can often rotate freely about its shaft. Pointed followers can be useful for detailed cam profiles, but are subject to wear and generate high contact stress. Flat-faced followers resist jamming, but cannot trace concave cam profiles. Followers that slide along the cam, such as flat-faced or pointed, generate more friction than rolling followers, but are attractive due to size and simplicity. Questions & answers Q: What are the pros and cons of the different follower contacts?Ī: Rolling followers are versatile, durable, and readily available. This could represent one cycle of the input shaft. In a simple case, it may have to move to a critical position "on time" while maintaining velocity and/or acceleration parameters, hold this position, or dwell, for a set time, and return to the original position under a different set of velocity/acceleration parameters. However, cams go beyond the function of linkage mechanisms, allowing a tremendous range of possibilities for the output motion.ĭepending on the application, the follower may be required to perform some tricky maneuvers. ![]() Where this overlap occurs, the cam usually provides the quicker design solution while presenting a more difficult manufacturing prospect. ![]() There can be overlapping functionality between cams and linkages (such as crank-rockers). The follower may move as a slider, reciprocating in a linear direction, or as a rocker, oscillating around a fixed pivot. This is accomplished by keeping one or more followers in contact with the surface of a rotating cam. Cams convert ordinary shaft rotation into a more complicated pattern of motion. ![]()
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