Document Type
Thesis
Date of Award
1-31-1986
Degree Name
Master of Science in Mechanical Engineering - (M.S.)
Department
Mechanical Engineering
First Advisor
Sachio Nakamura
Second Advisor
Bernard Koplik
Third Advisor
Roman Dubrovsky
Abstract
The concept of flexible manufacturing systems has ushered new dimensions into machine tool design. The power of this new technique is that a high degree of flexibility in a machine tool can be easily achieved by developing a software based control system as against conventional hard wired systems in existence.
To demonstrate this point, a microprocessor based control system is developed, in this thesis, to control the automated drill press. The Motorola MC6808 8-bit microprocessor is chosen as an example.
The microprocessor first evaluates the optimum cutting parameters for the given cutter size, work material and operation. It then uses a look-up table, which can be considered as data base, to evaluate the cutting parameters. The domain of applicability can be easily enhanced by expanding the look-up table.
The microprocessor controls two DC motors for the cutting speed and feed respectively. The speed and direction of the motor is controlled by digital bit patterns stored in the look-up table. The corresponding digital value is converted into an analog voltage through D/A converter and fed into a power amplifier to drive the motor.
The advantage of this system is that it permits a high level of automation because of the ease with which it can be integrated with a Computer Aided Manufacturing (CAM) system. It also reveals the frontiers of the microprocessor applications beyond the point to point Flexible Manufacturing System (FMS) machine, e.g. a drill press to 2D and S-D continuous path FMS machines.
Recommended Citation
Ayyagari, Arun J., "Simulation of a microprocessor controlled drill press" (1986). Theses. 3121.
https://digitalcommons.njit.edu/theses/3121
