Page 502 - Cam Design Handbook
P. 502

THB14  9/19/03  7:58 PM  Page 490

          490                      CAM DESIGN HANDBOOK



















































                                     (b)  Installation
                  FIGURE 14.38. Star wheel cams for intermittent motion. Drive of a printing press (note cams
                  on driver). Courtesy Harris-Seybold Co., Chicago, Ill.


          14.27.2 Cam-Modulated Worm and Worm Gear

          Many  fields  including  those  using  cloth,  wire,  and  paper  machinery  need  to  have  the
          machine’s speed controlled over a cycle of operation. This requirement has high power
          and  high  load,  often  best  satisfied  by  combining  cams  with  gears  and  all  driven  by  a
          constant-speed motor or engine. Accuracy, reliability, low vibration, and low noise may
          be achieved even when large masses are moved at high speeds. Cams offer all the advan-
   497   498   499   500   501   502   503   504   505   506   507