Electronically controlled thread-cutting machine

Details Electronically controlled thread-cutting machine Electronically controlled thread-cutting machine

1979-11-20

1982-07-06

Rubinson, Gene Z.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318685, 318283, 318640, 318601, 318603, 318434, 10129R, 10136E, 408 6, 408 11, 408 13, G05B 1918

Patent

active

043385567

ABSTRACT:
An electronically controlled thread-cutting machine comprising a pulse controlled stepping motor for driving the thread-cutting tool, sensor means for scanning an adjustable thread depth and the torque on the thread-cutting tool, said scanning means comprising a counter for determining the steps of the motor and the number of revolutions of the thread-cutting tool respectively therefrom for determining the depth of the thread, and the current consumption of the motor being used for determining the torque transmitted to the thread-cutting tool, the motor being controlled in accordance with the torque and depth of the thread by micro-processor means for reversing the motor when the torque exceeds an upper limit torque and when the desired and preselected thread depth has been attained.

REFERENCES:
patent: 3021464 (1962-02-01), Philip
patent: 3024399 (1962-03-01), Valentino
patent: 3545310 (1970-12-01), Porath et al.
patent: 3564633 (1971-02-01), Stade
patent: 3586953 (1971-06-01), Markkanen et al.
patent: 3676651 (1972-07-01), McDaniel
patent: 3689166 (1972-09-01), Jacob, Jr.
patent: 3720135 (1973-03-01), Merner et al.
patent: 4002960 (1977-01-01), Brookfield et al.
patent: 4042863 (1977-08-01), von der Heide
patent: 4129813 (1978-12-01), Hunts et al.
patent: 4157231 (1979-06-01), Phillips
"DC Motors, Speed Controls, Servo Systems", Electrocraft Corp., pp. 6-25 to 6-35.

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