Electricity: motive power systems – With particular motor-driven load device – Tension-maintaining type of motor-control system
Patent
1982-09-16
1985-09-10
Shoop, Jr., William M.
Electricity: motive power systems
With particular motor-driven load device
Tension-maintaining type of motor-control system
318 6, 242 7546, 242 7551, B65H 5938
Patent
active
045409200
ABSTRACT:
A system capable of unbuffered transfer of magnetic tape between a take-up reel and supply reel comprises a control unit connected through a mode switching device to a respective linked error device and pulse width modulator, arranged to drive a respective take-up or supply reel motor. A tachometer monitors the amount of a pre-determined length of supply spool tape transferred to the take-up spool and the control unit accordingly evaluates proposed reel motor current levels. The mode switching device operates each motor in velocity or acceleration mode. In the velocity mode a phase locked loop connected to the tachometer and a control frequency output provides an error signal which can be applied to the selected motor current level. In the acceleration mode a motor current sensor output is compared with the proposed current level to derive another error signal which can be applied to the selected current level.
REFERENCES:
patent: 4065074 (1977-12-01), Anderson et al.
patent: 4121138 (1978-10-01), Flint et al.
Cutler David S.
Spouse Keith G.
EMI Limited
Ro Bentsu
Shoop Jr. William M.
LandOfFree
Relating to tape transport control systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Relating to tape transport control systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relating to tape transport control systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1430859