Electricity: motive power systems – With particular motor-driven load device – Plural – diverse or diversely controlled driving motors
Patent
1989-09-07
1992-07-28
Ro, Bentsu
Electricity: motive power systems
With particular motor-driven load device
Plural, diverse or diversely controlled driving motors
318 13, 318 15, 318 55, H02K 7116
Patent
active
051343460
ABSTRACT:
The driving apparatus for the rotation of the spindle or the work piece pallet of an electroerosive machining device comprises two electric motors which drive e.g. the spindle to a rotational movement by means of two gear boxes and a plurality of gear wheels. In order to avoid any backlash in the gear box and any clearance between the gear wheels and to compensate the elasticity of the gear transmission, the two electric motors are always operated to rotate in opposite directions and/or to yield different values of torque. Thus, the entire transmission assembly is always subjected to a certain bias force so that a precise positioning of the spindle is possible by means of simple and inexpensive driving elements.
REFERENCES:
patent: 3202893 (1965-08-01), Arp et al.
patent: 3434025 (1969-03-01), Parkinson et al.
patent: 3452261 (1969-06-01), Tagliasacchi
patent: 3559008 (1971-01-01), Stut et al.
patent: 3612965 (1971-10-01), France
patent: 4087731 (1978-05-01), Rhoades
patent: 4594652 (1986-06-01), Mattson
patent: 4712048 (1987-12-01), Rebsamen
patent: 4788606 (1988-11-01), Uchikoshi
Liechti Niklaus
Schneider Rudolf
Erowa AG
Ro Bentsu
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