Page 733 - Mechatronics with Experiments

PROGRAMMABLE MOTION CONTROL SYSTEMS 719
Infeed Machine section 1 Machine section 2 Die cutter Folder Stacker

Mechanical line shaft and gearing

Electric motor
(a) Mechanical line shafting

Servos: controller, drives, motors HMI

Infeed Machine section 1 Machine section 2 Die cutter Folder Stacker

Impression
cylinder
Printing
cylinder

(b) Electronic line shafting
FIGURE 10.2: (a) An automated printing machine with mechanical coordination. A long
master shaft is driven by a large electric motor. All other stations are geared to the master shaft
mechanically. (b) An automated printing machine with electronic motion coordination. Each
station is independently driven by a small actuator (i.e., electric servo motor with position
sensors).

Real time communication
bus for motion control
(i.e., SERCOS)
To 3 motors in the
To 3 motors in the
loading station unloading station
M M

M M
M M

Loading Machining center Unloading
3 - axis process 3 - axis process
FIGURE 10.3: Motion coordination between a loading, machining center, and unloading
station. The machining center typically has its on CNC controller. Custom loading and unloading
stations need to be designed and controlled in coordination with the machine tool operation.