A cam indexer is a mechanical device producing intermittent indexing by means of cam-roller meshing, hence converting continuous rotation into accurate stop-motion. For high-speed and high-precision automation applications, its repeated positioning accuracy may approach ±30 arc seconds (around ±0.008°) and the output shaft has strong rigidity and outstanding impact resistance. For example, the flange model series cam indexer could still have a positioning error of ±0.02mm at 300 indexes per minute, far less than standard gear or belt drives.
The closed capsule filling machine is used in the production of pharmaceuticals and health care products; so, the process of capsule separation, filling, and closure has to be completed under sterile circumstances. Within 0.1 seconds, the capsule shell must be exactly aligned with the filling head; else, the filling amount will vary (for example, the error of the nominal 500mg medicine must be under control within ±2%). The speed of the equipment normally ranges from 200 to 400 grains/min at the same time; wear or vibration in the standard indexing mechanism causes decreased precision.
To control the precise capsule stoppage at each phase, the Cam Indexer in the capsule filling machine drives the station carousel directly. Its impacts show in:
Synchronous multi-station operation: by means of the indexing angle design (such as 90° indexing matching 4 stations), guarantee constant capsule in filling, closing, and other connections of residence duration;
By means of no backlash meshing between the cam and roller, eliminate transmission clearance, thereby eliminating the accumulated error of traditional chain/gear.
High-speed impact resistance: The high-rigidity construction can support the inertial force of the turntable (such as the load torque of 10N·m) so ensuring the stability of300 indexes per minute.